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In a wide range of valves used in heating networks, there is one element that is used infrequently. It is similar in shape to a tee, but the internal content differs greatly from the latter. Yes, and its purpose is completely different. This is a three-way valve for heating with a thermostat. The scheme of its installation, as well as the principle of operation will be considered in today's review.
Three-way valve with zone type thermal head
Basically, three-way valves are divided according to the principle of operation. There are three positions here:
- mixing,
- separating,
- switching.
The former mix two coolant streams with different temperatures into one, the latter, on the contrary, divide one stream into two. And still others simply switch the movement of water from one direction (circuit) to another. The first two varieties are similar in appearance to each other, so a diagram is applied to their case, which shows for what purposes the device should be used.
As for the third position, it is easy to distinguish it from the rest. He additionally has a block with which the switch occurs. A valve of this type is usually installed in a double-circuit when it is necessary to redirect the flow from the heating system to and vice versa.
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The device and principle of operation of the three-way valve in the heating system
So, first of all, let's deal with the device. To make it easier to understand what is inside the valve, you need to consider the photo below, in which the device is shown in section. It consists of three nozzles (two lateral one lower), between which there is a mixing chamber. On the fourth side (upper) is thermal headresponsible for controlling the temperature of the coolant.
Inside the device, from the thermostat there is a spring-loaded rod with two flat round valves. Their diameter corresponds to the diameter of the nozzle seats. Instead, one ball valve can be installed, located inside the mixing chamber between two seats. When pressure is applied to the stem, the valves partially block the flow from the lower branch pipe and open the upper one. All the same only happens in reverse if the stem rises.
But here you need to figure out what laws the stock works under, under the influence of what force it lowers or rises. It's all about the thermostat itself. Inside it is a temperature sensor filled with a special liquid. She is heat sensitive. As soon as the temperature of the coolant begins to rise, the liquid expands and rises through the capillary tube into a special bellows (capacity), which is located in the thermal head. The reservoir itself begins to expand, and thus presses on the stock. The latter descends and opens the lower pipe, from where cold water enters the three-way valve. Hot comes from the left pipe (see photo).
Of course, just like that, with any increase in water temperature, pressure cannot occur. To do this, a temperature gradation is set on the thermal head, which is manually adjusted. It is the set parameter that is the moment the rod is pressed.
So, the stem responded to a change in the temperature of the coolant in the supply pipe, opened the lower one for cold water, and the hot and cold media mixed up to the required temperature inside the valve. That is, it turns out that the temperature of the coolant at the inlet has not changed, but at the outlet it has become less.
In the event that the coolant continues to heat up, the rod may drop to the lowest position. That is, it will completely close the hot water supply and completely open the cold water supply. And this will continue until the coolant inside the heating system drops to the required temperature. After that, the top valve will open, it will start up hot water.
This is how a three-way mixing control valve works. As for the separating model, its principle of operation is almost the same, just the other way around. The coolant enters one pipe, inside the device case it is divided into two flows and exits through two adjacent pipes.
This type of valves is installed in those areas where the coolant flow must be divided into two circuits. One of them will be with a constant thermal regime, the other with a variable one. The first is the fluid flow, which is subject to quality requirements. The second with quantity requirements. At the same time, purely constructively, the flow with a constant hydraulic regime is never blocked, because in the design of the device, the stem length is made in such a way that the valve does not close the constant circuit.
But it must be noted that the length of the stem can be adjusted. This makes it possible to adjust the required volume of coolant on a constant circuit. As for the variable, it can completely overlap. This is how the flow and pressure of the coolant in the heating system is regulated. As you can see, the principle of operation of a three-way valve is quite simple. The main thing is to accurately select the type of device and install it in the required place in the circuit.
How does a three-way thermostatic valve work in a "warm floor" system
To make it clear how the valve circuit works, we can give an example of coolant circulation in the underfloor heating system. The three-way valve for underfloor heating is a mixing valve. The circulation scheme here is as follows:
- hot water through the collector enters the floor heating system;
- it must have a certain temperature, which is monitored precisely in the process of passing through a three-way valve;
- as soon as its value exceeds the permissible value, the valve opens one of the circuits, which is connected to the heating return;
- cooled coolant enters inside, lowering the temperature,
- after which the mixed water enters the heating circuit of the warm floor;
- as soon as the temperature drops to the required one, the return circuit is blocked inside the valve by the stem.
Three-way valves with actuators
Experts say that adjusting a three-way valve using a thermal head and a sensor is the simplest and most accurate. In addition, it does not consume electricity. That is why this type of three-way valve is popular today. But the process can be controlled in other ways. The simplest one is manual. Let's face it, this is not the most accurate option, because the range of the stem immersion depth is set by the handle located outside the valve body.
Attention! A valve with such an adjustment is recommended to be used only in those heating systems where the temperature drops of the coolant are insignificant.
The second option is to control the temperature regime with the help of electric drives. They receive commands from the controller.
Motorized 3-way valve
Valve-mounted motors are often referred to as servo motors. In fact, these are ordinary electric motors in which the shaft does not spin, but rotates by a certain degree. It should be noted that this category includes any types of engines, for example, thermal ones. The main thing is to fulfill the condition of rotation, not rotation.
Manufacturers today offer two positions regarding equipment. The first is a complete package that includes a controller and a temperature sensor. It is possible to immediately set the device to the required temperature, as well as to the angle of rotation, for example, from 0 to 180 °. In this case, any intermediate values are possible. The second is a separate drive with a sensor inside, to which the controller must be added as a separate element.
As for the controller, this is a device that solves the problems of signal management. In the case of heating, it reacts to temperature changes that are signaled to it by a temperature sensor. It processes the signals and decides what to do - open the valve or close it, or rather, turn it clockwise or counterclockwise. Today, manufacturers offer a huge model line of three-way electric valves. One of the most popular brands is ESBE (Sweden).
Three-way valve ESBE with electric actuator
First of all, it must be indicated that this brand of valves has a ball with through slots inside. The latter open or close two channels, the third always remains open. Through it, the coolant enters the heating system. Degree of rotation - 90÷180°.
In stores, the valve of this model is sold separately from the servo drive, therefore, before installation, they are interconnected by inserting the axis (shaft) of the drive into the upper part of the stem. It has a hole for the axle. After that, it is necessary, exactly according to the instructions attached to the device, to carry out the adjustment in terms of temperature conditions.
Today, the manufacturer offers a fairly wide range of ESBE three-way valves with and without an actuator:
| A photo | Model | Purpose |
|---|---|---|
 | VTA 200 | Designed for systems where there is no water recirculation. |
 | VTA 270 | This is a thermostatic valve for underfloor heating. It is installed if heating is organized in a room with an area of at least 100 m² |
 | VTA 310 | Valve for general use in any heating systems, where the temperature of the coolant does not exceed +95°C and the pressure is 0.3 atm. |
 | VTA 300/ VTA 360 | The two models differ from each other only in the direction of water movement in the heating system. They control the temperature well even with pressure surges inside the network. |
 | VTC300 | This is a 3-way valve without servo. It can be installed in systems that use low-power boilers - up to 30 kW. |
 | DN25 | This is a three-way valve for solid fuel boilers. That is, it can withstand coolant temperatures up to + 110 ° C. In this case, the power of the boilers should not be less than 150 kW. This is one of the most unpretentious devices of all present on the market. It can work under any conditions in any heating networks without changing the quality. |
 | VRG131 | This is the most popular and sought-after device that is used in apartments and private houses. |
Other models of three-way valves
Another well-known brand is the Navien three-way valve from a South Korean company. It should be noted that this device is an integral part of the double-circuit boiler of this manufacturer. And it is installed inside the heating equipment. Its main purpose is to separate the coolant for supply to the heating network and for hot water supply.
Attention! Navien valves are beyond repair. The main cause of failure is the gear transmission from the motor to the rod. Spare parts are not sold anywhere. In case of failure, the device must be replaced with a new one.
The Danish company Danfoss is a well-known manufacturer of three-way valves. It offers four models that are designed for different systems:
| A photo | Model | Purpose |
|---|---|---|
 | VF3 | Used in air conditioning and heating systems. Production material - cast iron. With flange connection. |
 | VMV | It is used only in heating systems. Production material - bronze or stainless steel. |
 | VRB3 | This is a mixer that is used both in heating systems and in refrigeration installations. Material - stainless steel. |
 | VRG3 | It is installed in heating networks or when transporting refrigerant. The material is either stainless steel or cast iron. |
Schemes for connecting a three-way valve to the heating network
After all the analysis regarding the design of the valve and its principle of operation, an understanding appeared of how it can be used in various heating systems. Most often it is used in three cases.
- In the system of warm floors, the temperature of the heat carrier must be within + 45 ° C. It is this mode that is supported by the device. This has already been discussed above, and it has been shown how it should work.
- To protect against the formation of condensate inside the furnace. This happens when relatively cold water returns to the generator heat exchanger. From this, water droplets from condensed steam form on the outer surfaces. This must not be allowed, because condensate shortens the life of the equipment.
- If there is a need to maintain different temperature conditions in different parts of the heating system.
The first option will not be considered, because it has already been described. As for the second case, it is necessary to take the photo below as the basis for the analysis.
There is a double circuit in the diagram: one large one passes through the radiators, the second - a short one through (this is a vertical red line, the beginning of which is at the top to the radiators, the end rests at the bottom of the valve). Until the boiler is warmed up, the coolant moves along a short circuit. The temperature has risen to the required level, the valve closes the bypass and opens the return (lower blue line).
And the third position, which is based on the distribution of the coolant among consumers, in which the required temperature is not always the same. For example, an indirect heating boiler requires water with a higher temperature, for batteries with a lower one, and even less for underfloor heating.
Attention! In such a scheme, there is no need to install control valves in front of the boiler.
The wiring diagram with the installation of a three-way valve should be approximately the same as shown in the photo below.
Three-way valves for heating with a fixed heating medium temperature
This is the so-called budget option. At a price it is cheaper than 30-35% of devices with drives. How is he different from everyone else. In its design there are no rods, no sensors, no thermal heads. A so-called thermostatic element is installed inside, which is set to a certain temperature of the coolant. For example, it can be either +45°С or +65°С. That is, the indicator can be any, depending on the requirements of the consumer of hot water.
The element is selected at the factory and installed there, so the valve must indicate what outlet temperature will be after it. For example, if you need a valve for underfloor heating, then choose with a temperature of + 45 ° C. The positive side of these devices is their cheapness. Negative - the inability to adjust the temperature of the water.
Attention! If a valve of this type is installed on the bypass of a solid fuel boiler, then it is necessary to study the passport of the generator itself before buying. The main indicator for the valve is the temperature of the water in the return circuit. It is for her that the device is selected.
A three-way valve in a water supply or heating system is responsible for mixing or separating liquids of different temperatures, as well as for obtaining the required temperature at the outlet of the liquid (adjusting the temperature of the coolant using a servo drive).
Design features
The body of the device contains two inlets and one outlet for liquids and a control element, which can be of different designs (for example, a rotary ball or a travel rod), as well as a place for a servo drive.
Usually, the valve is not designed to completely shut off the liquid outlet, but is only capable of controlling the mixing ratio of the liquids and the temperature in the system. The instruction does not imply, but functionally, it is quite possible to shut off the liquid supply.
A three-way valve of a certain variety, which performs a dividing function, may have a rotary servo to redirect the flow to different pipes (then it is called "shut-off").
In this case, there is no gradual or smooth mixing of liquids with temperature control, and the rotary mechanism itself consists of a ball (like a Bugatti ball valve).
There are several varieties of it, according to the type of drive mechanism, performing the same functions:
- Hydraulic slewing drive;
- Pneumatic drive;
- Electric servo.
Yes, three Esbe's new valve, having a servo drive, will assume the actual sample itself and a compatible drive manufactured by the same company.
Types and differences
Esbe has been in business for over a hundred years and specializes in temperature control for hydraulic systems in small buildings.
It manufactures a valve and rotary actuator for cooling or heating systems, also working "in conjunction" with indoor and outdoor temperature sensors in the system. The principle of operation of the Esbe three-way valve is similar to the above options.
The company produces several model series of three-way valves, including a mixing valve:
- Rotary valves (series models: VRG130, VRG330, 3F, H, VRH130, HG);
- Linear valves (series models: VLF300, VLF200, VLE132);
- Thermostatic mixing valve (series models: VTA and VTS).
Rotary valves
Valves of the VRG130 series are applied to systems of hot/cold water supply. This model range, like the subsequent ones, has various options (for example, the three-way valve from Esbe VRG 131 also belongs to this series and has a connection for a servo drive).
They are compact mixing models made of brass alloys, designed to minimize leakage and with a manual adjustment dial. The instruction indicates that they are also compatible with Esbe automatic control systems and controllers, which allow automating the operation of valves.
Esbe three-way valve of this model series - available in sizes DN 15-50, pressure class - PN 10, model options include varieties with internal (three-way mixing valve type Esbe model VRG131 with connection for actuator), external thread
(model VRG132), with union nut or compression fittings.
three-way Esbe's VRG330 Series Mixing Valve has similar features to the previously described VRG131 Series (DN 20-50, PN 10), but is specifically designed for high flows (60 percent kvs difference between inlets).
It can also be equipped with compatible controllers and automatic control. Available with three types of connection: internal thread, external thread, rotating nut.
According to Esbe specification, 3F series rotary mixing valves are designed for heating and cooling applications.
Esbe controllers and automatic control systems can also be used with them.
For ease of installation, the Esbe 3F three-way valve is marked with an adjustment scale on both sides. The valve body is made of cast iron, and the model is also supplied with an adapter for a flange pipe PN 6, model sizes - DN25-150.
The mixing valve from Esbe series H (DN25-40) and HG (DN25) is designed for installation in confined spaces.
This three-way control valve from Esbe is used only for heating systems and is specified for operation with a boiler group (made of cast iron, special "H"-shaped body). It also has an acceptable price.
As the main type of connection, both internal thread and its mixed type are used. Compatible with Esbe controllers and actuators like VRG131 .
Models of the VRH130 series are also made in the "H"-shaped version, but made of brass with a pressure class of PN 10. This model is more versatile than the previous sample and can also be used in water supply systems, is available with different body widths.
Line valves
The VLF300 series is a 3-way mixing line with sizes DN 15-50.
This model range is It is made of nodular cast iron and can be used with working fluids such as cold/hot water, and which contain antifreeze components (glycol, for example).
In the latter case, the sample must be equipped with a rod heater. It is completed with a flange for a PN 6 pipe. Models similar to those previously indicated, VLF200 dn25, are distinguished by a high working pressure of up to 16 bar (against 6 bar for the previously indicated model range).
Models VLE132 - made of bronze with sizes DN 15-50. These are linear motorized valves, which, like the previously mentioned similar models, can use water with glycol as working fluids (connection - external thread PN16), unlike the VRG131 series. Its price ranges from 140 to 350 euros.
All listed 3-way in-line valves are compatible with the Esbe controller and actuator.
thermostatic mixing valve
VTS520 / 550 - the instruction indicates that the three-way valves are designed to work with hot water systems that are connected to a solar heating system. Its price starts from 150 euros.
A feature of this model range is that the Esbe three-way thermostatic valve comes with specialized protection against burns, since the liquid circulating in the system is of a sufficiently high temperature.
Esbe's three-way thermostatic mixing valve with "scald protection" features a sensor that automatically turns off the hot water servo if cold water is not supplied.
The coolant with which these models work is water (including drinking water), the coolant of closed systems is water with non-freezing components. Pressure class - PN 10, the body is made of brass, resistant to corrosion, for example, the VRG131 valve is not suitable for such a system.
VTA330/530 is Esbe's thermostatic mixing valve of this series designed for use in domestic hot water systems, as well as in faucets or showers where no other means of temperature control is provided (VTA330), or in domestic hot water systems with high flow (VTA530). Its price is within 150 euros.
Also equipped with a security system you from burns. Pressure class PN 10 (material - brass, resistant to corrosion), is available with external threaded connection, fittings or adapters.
VTA360/560 - a series similar to the previous one, but equipped with a large number of fittings and connections. The instruction assumes that the drive of the Esbe three-way device of this series must also be compatible with those indicated by the company in the specification.
Representatives of the VTA320/520 series can be used both in conditions similar to the operating modes of the previous model ranges, and in systems where other temperature control systems are present.
These valves are recommended for hot water circulation systems (HWC) or underfloor heating systems. Also equipped with "burn protection". VTA370 / 570 - models designed for use in the "warm floor" system, have a high throughput.
VTA310 - sample supplied with adjusting knob, without burn protection system. It is used in domestic water supply systems, including - in the system of hot water supply of a closed cycle (HWC). The price for it starts from 50 euros.
Valve design overview (video)
Installation features and prices
When installing a three-way mixing valve, various options, instructions and algorithms are selected for installation. As a rule, the part is not installed directly to the heat source, since the system uses a non-pressure manifold or "hydraulic arrow".
In the version for heating, the simplified instruction assumes that the coolant is supplied from the boiler to the valve, from there the coolant is fed into the heating system through the pump.
The liquid that has passed through the heating system and cooled down is sent to the boiler for heating, but also to the mixing valve, which ensures the temperature control of the supplied substance.
The instruction for the Esbe three-way valve usually involves a description of the connection of the valve to the system, which, depending on the model range, may be different.
The cw602n Esbe three-way valve (brass brand is indicated here) of the VRG130 model range (namely, VRG131 ½) costs an average of $ 170 (if purchased complete with an actuator).
The price of a three-way valve from Esbe linear VLA330, depending on the configuration, is $ 150 (not equipped with an electric actuator).
The Esbe three-way thermostatic valve (VTA 320) can be priced at $70 or more.
Esbe valves are one of the most reliable and functional components used in various water supply systems, including domestic and main ones. It has a very wide range, which includes: rotary vrg131, dn25, as well as other popular varieties.
Currently, a three-way rotary sample of such equipment can be installed in every home. In order to do it right, let's look at the intricacies of working with such equipment and the features of its use.
Article content
Esbe valves - technical features of devices
Esbe valves are a variety of devices used to control a liquid or gas when it is supplied from one pipe to another. The three-way type of valves is distinguished by the presence of three connections that allow you to effectively redirect the flows in the system, especially in the case of mixing hot and cold water.
Adjusting the operation of valves of this type within the same system can realize the servo. This device needs a little more attention.
Servo. This is a separate element in the system that controls the position of the valves. A servo drive is usually the most affordable and easy to install, which is why it is most often used for.
According to the design features, the servo drive can be different, most often they are included in the category of such devices. For example, this can be installed with vrg131 samples. Today they provide the highest quality and accuracy in system maintenance, which is why they are so popular among consumers.
In some devices, a servo drive, as well as motor control is not used. In such cases, such special devices are used as for adjusting the operation of the equipment.
Such varieties include, for example, a dn25 valve, which can be mounted in a crane without a drive.
Esbe three-way valve overview (video)
Appointment of Esbe valves
This type of product can be used in a wide range of systems, including heating systems, even centralized, hot, cold water supply, as well as air conditioning.
These types of valves are suitable for various systems, including those operating on oil products, gas, as well as eco-fuels, including solar energy or wind energy. It is possible to install these types of equipment, for example, a three-way rotary valve vrg131, both for central water supply networks and for home networks.
You can pick up a product for any crane. It is only important to choose the right type of product and install it according to the recommendations. Also, for the system to work properly, it is very important to adjust the servomotor or thermostatic controller.
Then the model chosen by you will work without failures, irrespective of the set technical parameters.
Advantages of using this type of valves
Among the main advantages of installing exactly Esbe products are:
- Ease of installation of this type of components, the ability to install samples in virtually any system.
- Wide operating temperature range, especially for models such as the vrg131 swivel crane.
- Versatility in use - can be used in networks with different loads.
- No need for maintenance of such samples with the correct installation of such equipment.
- Can be used with any Esbe actuator that has the required specifications.
- The presence in some details of the so-called burn protection functions- automatic shutdown of hot water supply in the event that cold water has ceased to flow into the system.
Popular models of Esbe valves
Currently, the following Esbe valve models are especially popular on sale:
- VTA200 equipment is the best faucet for all water supply systems. Applicable for systems without hot water recirculation, as well as HWC with this function. Does not require special maintenance;
- VTA270 is a model range suitable for installation in underfloor heating systems. They can be mounted in systems where there is no risk of “burning”. Suitable for systems with a fairly large area - up to 100 square meters;
- VTA310 is an equipment, like the vrg131 swivel tap, suitable for all water supply systems where there are no special requirements for protection against burns. Designed for areas with a maximum coolant temperature of 95 degrees, withstand a differential pressure of 0.3 MPa. This type of valve can be mounted in a crane with any type of actuator;
- VTA330/VTA360 - equipment that is installed in systems that do not have additional devices that carry out temperature control. The features of this equipment are that, like the 3-way valve vrg131, it reacts as sensitively as possible to changes in pressure in the system and allows you to maintain a stable water temperature even with its jumps. This model comes with a special protective cover, unless, of course, the user has chosen a different package. Parts of the VTA330/VTA360 are only distinguishable by the direction of the water flow;
- VTC300 is a thermostatic mixer. The crane is used for installation with boilers up to 30 kW. It is used in cases where a coolant of a sufficiently low temperature enters through the return pipe of the equipment. There is no need to install a servo drive for this model - without it, it also functions quite normally. The equipment has several installation options and can be easily adapted to the requirements of your chosen system;
- DN25 is another particularly popular valve model. Represents. Can also be used to protect boilers power up to 150 kW. The working temperature of this sample is also 110 degrees. DN25 is completely unpretentious to the installation conditions, its efficiency does not depend on the chosen installation position;
- model vrg131 - designed specifically for use in hot water networks. Released vrg from a specialized brass alloy, which significantly increases its service life. Can be set manually. It is recommended to use a servomotor from the same manufacturer to control this three-way valve.
Esbe products are quite popular today. is no exception. It is one of the many elements that are included in the life support system of residential buildings.
The need to use
This design, on the one hand, is quite simple, but on the other hand, it is designed to perform an extremely important task, being part of engineering networks. Everyone knows the rule that demand creates supply, which is why on the market today you can find many models that are represented by various manufacturers. However, valves manufactured by Esbe are distinguished by excellent performance. A three-way valve of this type can be purchased at an affordable cost. This is confirmed by user reviews.
Design features
In a wide range today you can find Esbe products. The three-way valve is no exception. This element has a regulating component, which is a ball or a rod. The latter moves vertically, but as for the ball, its movement occurs around its axis. Due to the fact that the movements of the regulating element do not allow to block the flow of liquid, distribution and mixing occurs. The most common and simple models are cranes.
Main plus
Their main advantage is low cost and simplicity. However, if you need to adjust the Esbe three-way valve, then you should exclude the purchase of simple devices, since they have the main drawback, expressed in the inability to stabilize the outlet temperature.
Carrying out installation work
Almost all described valves that are on the market are connected on the basis of one scheme. Most often, mixer taps are used in water supply systems. Their main goal is to reduce the risk of backflow. Between the streams of cold and hot water, a pressure difference will inevitably occur. It can cause reverse flow. If you install a valve, then you will not encounter such a problem. If we are talking about a heating system, then such devices are used exclusively in three directions, namely, to stabilize the temperature regime of the coolant flow in the incoming pipeline of boiler equipment, to reduce the supply of high-temperature water from the heating device to the pipeline, as well as in the conditions of mixing units of systems underfloor heating.
Connection in the mixing unit
If you are interested in Esbe products, the three-way valve can be purchased from any relevant store. One has only to consider before that how the tap is used in the underfloor heating system. The use of a mixing unit allows you to create an additional circuit in the system. It connects with two points to this allows for a constant circulation of water at the outlet. As for the inlet, the flow is provided only if there is a need to obtain additional heat. The thermostatic valve is connected to the mixing unit. Due to the fact that all valves are at the point, they are narrowed, which can cause insufficient flow of pumping equipment. To increase it, it is necessary to create an additional line, with which you can reduce the electricity consumption of the pump. During the installation process, it is worth remembering that a second line is not always required. A number of valve models have a fairly large passage. An Esbe three-way valve, whose connection diagram can be designed based on the instructions presented in the article, may suggest insufficient flow capacity in the first line. In this case, the thermostat is not able to open the passage of the required size. This issue can be easily solved in two ways: the first involves narrowing the second line, while the other option is to mount on it. The latter option is considered more productive, as it allows you to adjust the flow.
Alternative installation option
Installation of the Esbe three-way valve can also be done by another method. It does not involve the use of a balancing crane. The pump is connected to the second line, eventually the temperature of the outlet and inlet streams equalize. A thermostatic valve is found in single circuit systems. The simplest example of such systems is underfloor heating in small rooms. In this case, it is not always justified to create a mixing unit with large dimensions. It is best to connect the underfloor heating system using one circuit. If you are thinking about how to connect an Esbe three-way valve with an electric drive, then it can be placed on the return line, through which cooled water runs. In this case, the thermostat will lead to the movement of the valves, the cross section will be increased, and the flow will be open. As soon as the pipe is heated, the thermal sensor will detect this and reduce the flow.
Installation of a valve for a heating boiler
This issue, according to professionals, must be considered separately. The main task of the installation is to prevent the entry of a cold water flow to the incoming pipeline, which is connected to the heating equipment. If this requirement is not taken into account, then condensation will occur on the pipes, temperature drops will lead to deformation at the joints. If we talk about the consequences of deformation, then at best you will encounter a small leak, while at worst the system will need to be completely changed. In order to avoid the need to repair the Esbe three-way valve, it is important to connect the shut-off valves to the boiler, which is characterized by temperature changes during operation. If you install a mixing valve, then you can ensure that water does not enter the inlet of the equipment, the temperature of which is below 50 degrees. The temperature difference is significantly reduced, the negative impact of cold is reduced. Experts advise supplementing systems that are equipped with plastic pipelines with mixing valves. In this case, the task is to prevent the ingress of high temperature water into the pipeline. While polymers have many advantages, they do not cope well with frequent temperature changes, which can be higher than operating temperatures.
Under the influence of such conditions, the pipeline system fails soon enough. Experts advise choosing Esbe products. The three-way valve, the installation instructions for which are presented in the article, has been manufactured by this company for a long time. If you use this element, then you can provide temperature readings ranging from 75 to 85 degrees, which are recommended by experts. Mounting the valve allows you to cope with many problems, however, the model must be selected in accordance with the characteristics of the network, and also have a sufficiently large passage.
Adjustment features
When purchasing Esbe products - a three-way valve, the installation and adjustment instructions for which are presented in the article - you must remember that with this device it is possible to mix the cooled water from the return into the supply. For high-quality regulation, not only a three-way valve, but also a four-way valve, which must be present in the heating system, is installed in the system independently. It is located directly in front of the contour of the warm floor. The handle allows you to open the bypass, while the circulation pumps and equipment draw in the cooled coolant from the return, where it is mixed with hot water. In order for the adjustment to be made as efficiently as possible, you should understand what happens at certain positions of the handle. The latter can be set to the bypass overlap position, while the hot coolant will flow into the pipe of the underfloor heating system. As for the mode in which the supply is blocked, water enters the tank and runs in a small circle. The third position allows you to feed the supply from the return system without blocking the full cycle of water passage throughout the circuit.
Conclusion
Recently, experts have increasingly recommended purchasing Esbe brand products. A three-way valve, the instruction, the wiring diagram of which is presented in the article, is just an example of this. It can act as an indispensable element of the heating system and part of the boiler equipment, however, it is important to choose the right model and install it, observing the technology.
A three-way valve in a water supply or heating system is responsible for mixing or separating liquids of different temperatures, as well as for obtaining the required temperature at the outlet of the liquid (adjusting the temperature of the coolant using a servo drive).
Design features
The body of the device contains two inlets and one outlet for liquids and a control element, which can be of different designs (for example, a rotary ball or a travel rod), as well as a place for a servo drive.
Usually, the valve is not designed to completely shut off the liquid outlet, but is only capable of controlling the mixing ratio of the liquids and the temperature in the system. The instruction does not imply, but functionally, it is quite possible to shut off the liquid supply.
A three-way valve of a certain variety, which performs a dividing function, may have a rotary servo to redirect the flow to different pipes (then it is called "shut-off").
In this case, there is no gradual or smooth mixing of liquids with temperature control, and the rotary mechanism itself consists of a ball (like a Bugatti ball valve).
There are several varieties of it, according to the type of drive mechanism, performing the same functions:
- Hydraulic slewing drive;
- Pneumatic drive;
- Electric servo.
Yes, three Esbe's new valve, having a servo drive, will assume the actual sample itself and a compatible drive manufactured by the same company.
Types and differences
Esbe has been in business for over a hundred years and specializes in temperature control for hydraulic systems in small buildings.
It manufactures a valve and rotary actuator for cooling or heating systems, also working "in conjunction" with indoor and outdoor temperature sensors in the system. The principle of operation of the Esbe three-way valve is similar to the above options.
The company produces several model series of three-way valves, including a mixing valve:
- Rotary valves (series models: VRG130, VRG330, 3F, H, VRH130, HG);
- Linear valves (series models: VLF300, VLF200, VLE132);
- Thermostatic mixing valve (series models: VTA and VTS).
Rotary valves
Valves of the VRG130 series are applied to systems of hot/cold water supply. This model range, like the subsequent ones, has various options (for example, the three-way valve from Esbe VRG 131 also belongs to this series and has a connection for a servo drive).
They are compact mixing models made of brass alloys, designed to minimize leakage and with a manual adjustment dial. The instruction indicates that they are also compatible with Esbe automatic control systems and controllers, which allow automating the operation of valves.
Esbe three-way valve of this model series - available in sizes DN 15-50, pressure class - PN 10, model options include varieties with internal (three-way mixing valve type Esbe model VRG131 with connection for actuator), external thread
(model VRG132), with union nut or compression fittings.
three-way Esbe's VRG330 Series Mixing Valve has similar features to the previously described VRG131 Series (DN 20-50, PN 10), but is specifically designed for high flows (60 percent kvs difference between inlets).
It can also be equipped with compatible controllers and automatic control. Available with three types of connection: internal thread, external thread, rotating nut.
According to Esbe specification, 3F series rotary mixing valves are designed for heating and cooling applications.
Esbe controllers and automatic control systems can also be used with them.
For ease of installation, the Esbe 3F three-way valve is marked with an adjustment scale on both sides. The valve body is made of cast iron, the model is also supplied with an adapter for a flanged pipe PN 6, model sizes - DN25-150.
The mixing valve from Esbe series H (DN25-40) and HG (DN25) is designed for installation in confined spaces.
This three-way control valve from Esbe is used only for heating systems and is specified for operation with a boiler group (made of cast iron, special "H"-shaped body). It also has an acceptable price.
As the main type of connection, both internal thread and its mixed type are used. Compatible with Esbe controllers and actuators like VRG131 .
Models of the VRH130 series are also made in the "H"-shaped version, but made of brass with a pressure class of PN 10. This model is more versatile than the previous sample and can also be used in water supply systems, is available with different body widths.
Line valves
The VLF300 series is a 3-way mixing line with sizes DN 15-50.
This model range is It is made of nodular cast iron and can be used with working fluids such as cold/hot water, and which contain antifreeze components (glycol, for example).
In the latter case, the sample must be equipped with a rod heater. It is completed with a flange for a PN 6 pipe. Models similar to those previously indicated, VLF200 dn25, are distinguished by a high working pressure of up to 16 bar (against 6 bar for the previously indicated model range).
Models VLE132 - made of bronze with sizes DN 15-50. These are linear motorized valves, which, like the previously mentioned similar models, can use water with glycol as working fluids (connection - external thread PN16), unlike the VRG131 series. Its price ranges from 140 to 350 euros.
All listed 3-way in-line valves are compatible with the Esbe controller and actuator.
thermostatic mixing valve
VTS520 / 550 - the instruction indicates that the three-way valves are designed to work with hot water systems that are connected to a solar heating system. Its price starts from 150 euros.
A feature of this model range is that the Esbe three-way thermostatic valve comes with specialized protection against burns, since the liquid circulating in the system is of a sufficiently high temperature.
Esbe's three-way thermostatic mixing valve with "scald protection" features a sensor that automatically turns off the hot water servo if cold water is not supplied.
The coolant with which these models work is water (including drinking water), the coolant of closed systems is water with non-freezing components. Pressure class - PN 10, the body is made of brass, resistant to corrosion, for example, the VRG131 valve is not suitable for such a system.
VTA330/530 is Esbe's thermostatic mixing valve of this series designed for use in domestic hot water systems, as well as in faucets or showers where no other means of temperature control is provided (VTA330), or in domestic hot water systems with high flow (VTA530). Its price is within 150 euros.
Also equipped with a security system you from burns. Pressure class PN 10 (material - brass, resistant to corrosion), is available with external threaded connection, fittings or adapters.
VTA360/560 - a series similar to the previous one, but equipped with a large number of fittings and connections. The instruction assumes that the drive of the Esbe three-way device of this series must also be compatible with those indicated by the company in the specification.
Representatives of the VTA320/520 series can be used both in conditions similar to the operating modes of the previous model ranges, and in systems where other temperature control systems are present.
These valves are recommended for hot water circulation systems (HWC) or underfloor heating systems. Also equipped with "burn protection". VTA370 / 570 - models designed for use in the "warm floor" system, have a high throughput.
VTA310 - sample supplied with adjusting knob, without burn protection system. It is used in domestic water supply systems, including - in the system of hot water supply of a closed cycle (HWC). The price for it starts from 50 euros.
Valve design overview (video)
Installation features and prices
When installing a three-way mixing valve, various options, instructions and algorithms are selected for installation. As a rule, the part is not installed directly to the heat source, since the system uses a non-pressure manifold or "hydraulic arrow".
In the version for heating, the simplified instruction assumes that the coolant is supplied from the boiler to the valve, from there the coolant is fed into the heating system through the pump.
The liquid that has passed through the heating system and cooled down is sent to the boiler for heating, but also to the mixing valve, which ensures the temperature control of the supplied substance.
The instruction for the Esbe three-way valve usually involves a description of the connection of the valve to the system, which, depending on the model range, may be different.
The cw602n Esbe three-way valve (brass brand is indicated here) of the VRG130 model range (namely, VRG131 ½) costs an average of $ 170 (if purchased complete with an actuator).
The price of a three-way valve from Esbe linear VLA330, depending on the configuration, is $ 150 (not equipped with an electric actuator).
The Esbe three-way thermostatic valve (VTA 320) can be priced at $70 or more.
Esbe valves are one of the most reliable and functional components used in various water supply systems, including domestic and main ones. It has a very wide range, which includes: rotary vrg131, dn25, as well as other popular varieties.
Currently, a three-way rotary sample of such equipment can be installed in every home. In order to do it right, let's look at the intricacies of working with such equipment and the features of its use.
Article content
Esbe valves - technical features of devices
Esbe valves are a variety of devices used to control a liquid or gas when it is supplied from one pipe to another. The three-way type of valves is distinguished by the presence of three connections that allow you to effectively redirect the flows in the system, especially in the case of mixing hot and cold water.
Adjusting the operation of valves of this type within the same system can realize the servo. This device needs a little more attention.
Servo. This is a separate element in the system that controls the position of the valves. The servo drive is usually the most affordable and easy to install, which is why it is most often used for.
According to the design features, the servo drive can be different, most often the category of such devices includes. For example, this can be installed with vrg131 samples. Today they provide the highest quality and accuracy in system maintenance, which is why they are so popular among consumers.
In some devices, a servo drive, as well as motor control is not used. In such cases, such special devices are used as for adjusting the operation of the equipment.
Such varieties include, for example, a dn25 valve, which can be mounted in a crane without a drive.
Esbe three-way valve overview (video)
Appointment of Esbe valves
This type of product can be used in a wide range of systems, including heating systems, even centralized, hot, cold water supply, as well as air conditioning.
These types of valves are suitable for various systems, including those operating on oil products, gas, as well as eco-fuels, including solar energy or wind energy. It is possible to install these types of equipment, for example, a three-way rotary valve vrg131, both for central water supply networks and for home networks.
You can pick up a product for any crane. It is only important to choose the right type of product and install it according to the recommendations. Also, for the system to work properly, it is very important to adjust the servomotor or thermostatic controller.
Then the model chosen by you will work without failures, irrespective of the set technical parameters.
Advantages of using this type of valves
Among the main advantages of installing exactly Esbe products are:
- Ease of installation of this type of components, the ability to install samples in virtually any system.
- Wide operating temperature range, especially for models such as the vrg131 swivel crane.
- Versatility in use - can be used in networks with different loads.
- No need for maintenance of such samples with the correct installation of such equipment.
- Can be used with any Esbe drive that has the required specifications.
- The presence in some details of the so-called burn protection functions- automatic shutdown of hot water supply in the event that cold water has ceased to flow into the system.
Popular models of Esbe valves
Currently, the following models of Esbe valves are especially popular on sale:
- VTA200 equipment is the best faucet for all water supply systems. Applicable for systems without hot water recirculation, as well as HWC with this function. Does not require special maintenance;
- VTA270 is a model range suitable for installation in underfloor heating systems. They can be mounted in systems where there is no risk of “burning”. Suitable for systems with a fairly large area - up to 100 square meters;
- VTA310 is an equipment, like the vrg131 swivel tap, suitable for all water supply systems where there are no special requirements for protection against burns. Designed for areas with a maximum coolant temperature of 95 degrees, withstand a differential pressure of 0.3 MPa. This type of valve can be mounted in a crane with any type of actuator;
- VTA330/VTA360 - equipment that is installed in systems that do not have additional devices that carry out temperature control. The features of this equipment are that, like the 3-way valve vrg131, it reacts as sensitively as possible to changes in pressure in the system and allows you to maintain a stable water temperature even with its jumps. This model comes with a special protective cover, unless, of course, the user has chosen a different package. Parts of the VTA330/VTA360 are only distinguishable by the direction of the water flow;
- VTC300 is a thermostatic mixer. The crane is used for installation with boilers up to 30 kW. It is used in cases where a coolant of a sufficiently low temperature enters through the return pipe of the equipment. There is no need to install a servo drive for this model - without it, it also functions quite normally. The equipment has several installation options and can be easily adapted to the requirements of your chosen system;
- DN25 is another particularly popular valve model. Represents . Can also be used to protect boilers power up to 150 kW. The working temperature of this sample is also 110 degrees. DN25 is completely unpretentious to the installation conditions, its efficiency does not depend on the chosen installation position;
- model vrg131 - designed specifically for use in hot water networks. Released vrg from a specialized brass alloy, which significantly increases its service life. Can be set manually. It is recommended to use a servomotor from the same manufacturer to control this three-way valve.
