Safety spring valves of direct action SPPK4, SPPK4R medium supply direction - under the spool. The force of the compressed spring presses the spool to the seat, when the pressure of the working medium exceeds the set value, the opposite force acts on the spool, which compresses the spring and opens the passage for the discharge of the working medium. After reducing the pressure in front of the valve to the back-seat pressure, the spool is again pressed against the seat under the action of the spring force, stopping the discharge of the medium.

Safety valves are designed for liquid and gaseous, chemical or petroleum media. The tightness standards in the gate according to GOST 9789-75.

Safety valves are designed to protect equipment from inadmissible excess of the set pressure. They are used in tanks, boilers, containers, vessels and pipelines for automatic discharge of the working medium into the atmosphere or a discharge pipeline. After reducing the pressure to the desired limit, the safety valve stops the discharge of the medium. Throughput calculation is made in accordance with GOST 12.2.085.

valves are marked as SPK4R-100-16, where the alphanumeric designation means the following:

SPPK - special spring safety valve;

4 - valve modification number;

P - indicates the presence of a manual override lever (if it is absent, the letter is not indicated);

100 - nominal passage at the inlet in mm (DN);

16 - working pressure in kgf/cm2 (PN);

Safety valves according to the traditional "table of figures" have a type designation 17s17nzh or 17s25nzh, where:

17 - designation of the type of fittings - safety valve;

c - designation of the material of the valve body (steel 20L);

17 or 25 - conditional numbers indicating the valve modification number;

nzh - designation of the material of the valve seat.

Valves of types SPKK and SPK4R are full-lift, spring-loaded, on-off, closed-type safety valves, but they operate as full-lift valves only in gaseous (vaporous) media. When operating on liquid (incompressible) media, the throughput capacity of valves of the SPPK and SPPK4R types is 4-8 times less than when operating on gaseous media.

Safety valves for checking serviceability and purging in working condition SPPK4R type valves have a special lever for manual opening of the "manual undermining" device. Valves of type SPPK4 have no lever.

Flanged spring safety valves made of 20L steel with a device for forced opening

Working environment - water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and environments not aggressive to steel 20L, with temperature from minus 40C to plus 425C. The minimum ambient air temperature during operation is minus 40C.

Flanged spring safety valves made of steel 20L without forced opening device

Climatic version - U1 GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Working environment - water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and the environments which are not aggressive to steel 20L, with a temperature from minus 40C to plus 425C. The minimum ambient air temperature during operation is minus 40C.

Flanged spring safety valves made of steel 12Kh18N9TL with a device for forced opening

Climatic version - UHL1 according to GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Flanged spring safety valves made of steel 12Kh18N9TL without device for forced opening

Climatic version - UHL1 according to GOST15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Working medium - water, air, steam, ammonia, wet natural gas, oil products containing hydrogen sulfide up to 0.1%, liquid and gaseous hydrocarbons, petrochemical media with temperatures from minus 60C to plus 600C. The minimum ambient temperature is minus 60C.

When ordering safety valves, please specify:

Product name, designation;

Nominal size (nominal passage) (DN, mm);

Nominal (conditional) pressure (PN, kgf/cm2);

Opening start pressure (Рн.о, kgf/cm2) or spring number;

Execution according to the material;

The need for a manual opening device.

To order Safety spring valves of direct action SPPK4, SPPK4R, delivery time can be used using the order form or contact information. Upon request, we will provide: scheme, passport, certificate, permit.

Safety valve 17s6nzh with manual undermining (the valve also has the name SPPK4R and SPPK5R) is a type of direct-acting automatic valve that protects pipelines from an unintentional increase in the working pressure of the medium above the established norm.

Devices 17s6nzh are used on capacitive equipment, tanks, boilers and engineering networks for automatic release of media in order to regulate the working pressure of a controlled environment.

The main characteristics of 17s6nzh are the response pressure, the amount of medium discharged per unit of time and throughput. The pressure force at which the device is triggered is adjusted on special equipment. To remove dirt particles that accumulate during operation, and to check the device's performance, a special element for manual opening is provided.

Principle of action 17s6nzh

The safety valve 17s6nzh is equipped with a special spring that holds the spool, pressing it to the seat. Excessive pressure inside the pipeline system exerts an action opposite to the spring force, pushing the spool out of the seat, which leads to the discharge of part of the working fluid outside the pipeline. After the pressure is restored, the valve moves from its original position, stopping the discharge of the medium. The 17s6nzh valve is equipped with an additional mechanism that allows manual pressure relief.

For uninterrupted and reliable operation of the 17s6nzh valve, it is necessary to conduct a regular technical inspection of the structure, at least 2 times a year.

When choosing a valve model 17s6nzh, one should take into account the viscosity of the transported medium, its consistency affects the throughput of the safety element. Installation of these valves is carried out in a vertical position, in easily accessible areas.

Pressure range of valve spring setting 17s6nzh (Рн, kg/cm2)

Materials used for the manufacture of valve 17s6nzh

Overall and connecting dimensions of the valve 17s6nzh

Safety spring valves of direct action SPPK4, SPPK4R medium supply direction - under the spool. The force of the compressed spring presses the spool to the seat, when the pressure of the working medium exceeds the set value, the opposite force acts on the spool, which compresses the spring and opens the passage for the discharge of the working medium. After reducing the pressure in front of the valve to the back-seat pressure, the spool is again pressed against the seat under the action of the spring force, stopping the discharge of the medium.

Safety valves are designed for liquid and gaseous, chemical or petroleum media. The tightness standards in the gate according to GOST 9789-75.

Safety valves are designed to protect equipment from inadmissible excess of the set pressure. They are used in tanks, boilers, containers, vessels and pipelines for automatic discharge of the working medium into the atmosphere or a discharge pipeline. After reducing the pressure to the desired limit, the safety valve stops the discharge of the medium. Throughput calculation is made in accordance with GOST 12.2.085.

valves are marked as SPK4R-100-16, where the alphanumeric designation means the following:

SPPK - special spring safety valve;

4 - valve modification number;

P - indicates the presence of a manual override lever (if it is absent, the letter is not indicated);

100 - conditional passage at the inlet in mm (DN);

16 — working pressure in kgf/cm2 (PN);

Safety valves according to the traditional "table of figures" have a symbol of the type 17s17nzh or 17s25nzh, where:

17 - designation of the type of fittings - safety valve;

c - designation of the material of the valve body (steel 20L);

17 or 25 - conditional numbers indicating the valve modification number;

nzh - designation of the material of the valve seat.

Valves of types SPKK and SPK4R are full-lift, spring-loaded, on-off, closed-type safety valves, but they operate as full-lift valves only in gaseous (vaporous) media. When operating on liquid (incompressible) media, the throughput capacity of valves of the SPPK and SPPK4R types is 4-8 times less than when operating on gaseous media.

Safety valves for checking serviceability and purging in working condition SPPK4R type valves have a special lever for manual opening of the “manual blasting” device. Valves of type SPPK4 have no lever.

Flanged spring safety valves made of 20L steel with a device for forced opening

Working medium - water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and media not aggressive to steel 20L, with a temperature of minus 40C to plus 425C. The minimum ambient air temperature during operation is minus 40C.

Flanged spring safety valves made of steel 20L without forced opening device

Climatic version - U1 GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Working medium - water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and media that are not aggressive to steel 20L, with a temperature of minus 40C to plus 425C. The minimum ambient air temperature during operation is minus 40C.

Flanged spring safety valves made of steel 12Kh18N9TL with a device for forced opening

Climatic version - UHL1 according to GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Flanged spring safety valves made of steel 12Kh18N9TL without device for forced opening

Climatic version - UHL1 according to GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set one;

Working medium - water, air, steam, ammonia, wet natural gas, oil products containing hydrogen sulfide up to 0.1%, liquid and gaseous hydrocarbons, petrochemical media with temperatures from minus 60C to plus 600C. The minimum ambient temperature is minus 60C.

When ordering safety valves, please specify:

- product name, designation;

- nominal size (nominal passage) (DN, mm);

— nominal (conditional) pressure (PN, kgf/cm2);

- pressure of the beginning of opening (Рн.о, kgf / cm2) or spring number;

— performance according to the material;

- the need for a device for manual opening.

To order Safety spring valves of direct action SPPK4, SPPK4R, delivery time can be usedor contact information. Upon request, we will provide: scheme, passport, certificate, permit.

Safety valve special full-lift spring with a lever for control purge type SPPK4R-16 (17s6nzh)

Designed to limit the pressure of non-aggressive gases by discharging gas into the atmosphere to the set value when the pressure in the network rises above the allowable limit. It is installed on gas pipelines of medium and high pressure.

Specifications

Device and principle of operation

The inlet pipe of the valve (see figure) is connected to the controlled section of the gas pipeline after the pressure regulator. A spool 1 is installed in the valve body, pressed against the seat by a spring 2, the force of which is regulated by moving the support washer 3 by rotating the screw 4 in the thread. which is much larger than the central part, as a result of which the static pressure increases, squeezing the spool up. In addition, the inwardly beveled edge of the spool deflects down the flow of gas flowing from the seat. With this flow deflection, a reactive force is created which adds up to the already increased static pressure on the spool. The balance between the force of the spring and the pressure of the gas on the spool is broken, and the spool jerks up to its highest position. When the pressure in the gas pipeline decreases, the gas pressure on the spool cannot overcome the force of the compressed spring and the spool quickly sits on the seat, hermetically blocking the gas flow. The valve is equipped with a lever 5 for forced opening.

Safety valve special full-lift spring with a lever for control purge type SPPK4R-16 (17s6nzh)

Purpose of the product

Designed to limit the pressure of non-aggressive gases by discharging gas into the atmosphere to the set value when the pressure in the network rises above the allowable limit. It is installed on gas pipelines of medium and high pressure.

Specifications

Device and principle of operation

The inlet pipe of the valve (see figure) is connected to the controlled section of the gas pipeline after the pressure regulator. A spool 1 is installed in the valve body, pressed against the seat by a spring 2, the force of which is regulated by moving the support washer 3 by rotating the screw 4 in the thread. which is much larger than the central part, as a result of which the static pressure increases, squeezing the spool up. In addition, the inwardly beveled edge of the spool deflects down the flow of gas flowing from the seat. With this flow deflection, a reactive force is created which adds up to the already increased static pressure on the spool. The balance between the force of the spring and the pressure of the gas on the spool is broken, and the spool jerks up to its highest position. When the pressure in the gas pipeline decreases, the gas pressure on the spool cannot overcome the force of the compressed spring and the spool quickly sits on the seat, hermetically blocking the gas flow. The valve is equipped with a lever 5 for forced opening.