Safety Relief Valve

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Stainless Steel Safey Relief Valve

Stainless Steel Safey Relief Valve


Stainless steel safety relief valves are widely used in various fields such as chemical, petroleum, and pharmaceutical industries, as well as in air and various corrosive liquids. The stainless steel safety relief valve we manufacture adopts the design of stainless steel material for wetted part, commonly including SS304, SS316L, etc. The upper valve body material can be produced according to customers’ needs. Stainless steel pressure relief valves can operate stably for a long time in harsh working environments and have high corrosion resistance and wear resistance. Compared to other plastic safety valves, stainless steel safety valves can achieve a pressure of 2.5 Mpa or higher, which can meet some high-pressure usage conditions. The surface of the safety valve made of stainless steel is smooth, not prone to scaling, easy to clean and maintain which can reduce maintenance costs.


Basic information of Stainless Steel Series Safety Relief Valves:

Diaphragms: PTFE composite NBR,EPDM etc.

Material for upper valve body: SS304,SS16L,carbon steel or customized

Material for lower valve body: SS304,SS16L,Hastelloy etc.

Adjustable pressure: 0-1.0MPa,0-2.5Mpa

Connection type:Thread,Flange and can be customized


Mode of 304 Stainless Steel Safey Relief Valve

ModelMaterialNominal Dia. (mm)Setting Pressure (MPa)DimensionStandard Connection
Lower Valve Body Dia. (mm)Total Height (mm)
RXAF-S6/1.0SUS30460.1-1.064.782Rc1/8”
RXAF-S8/1.0SUS30480.1-1.064.787Rc1/4”
RXAF-S10/1.0SUS304100.1-1.064.789Rc3/8”
RXAF-S15/1.0SUS304150.1-1.064.794Rc1/2”
RXAF-S20/1.0-NSUS304200.1-1.064.7104Rc3/4”
RXAF-S20/1.0SUS304200.1-1.087123Rc3/4”
RXAF-S25/1.0SUS304250.1-1.087128Rc1”
RXAF-S32/1.0SUS304320.1-1.0117175Rc1 1/4”
RXAF-S40/1.0-NSUS304400.1-1.0117185Rc1 1/2”
RXAF-S40/1.0SUS304400.1-1.0137240Rc1 1/2”
RXAF-S50/1.0SUS304500.1-1.0167260Rc2”
RXAF-S65/1.0SUS304650.1-1.0177325Rc2 1/2”
RXAF-S80/0.6SUS304800.1-0.62254203” flanged
RXAF-S100/0.6SUS3041000.1-0.62404304” flanged
Other unspecified model/material/connection and DN100 above can be customized according to requirement.

Model of 316 Stainless Steel Safey Relief Valve

ModelMaterialNominal Dia. (mm)Setting Pressure (MPa)DimensionStandard connection
Lower Valve Body Dia. (mm)Total Height (mm)
RXAF-L6/1.0SUS316L60.1-1.064.782Rc1/8”
RXAF-L8/1.0SUS316L80.1-1.064.787Rc1/4”
RXAF-L10/1.0SUS316L100.1-1.064.789Rc3/8”
RXAF-L15/1.0SUS316L150.1-1.064.794Rc1/2”
RXAF-L20/1.0-NSUS316L200.1-1.064.7104Rc3/4”
RXAF-L20/1.0SUS316L200.1-1.087123Rc3/4”
RXAF-L25/1.0SUS316L250.1-1.087128Rc1”
RXAF-L32/1.0SUS316L320.1-1.0117175Rc1 1/4”
RXAF-L40/1.0-NSUS316L400.1-1.0117185Rc1 1/2”
RXAF-L40/1.0SUS316L400.1-1.0137240Rc1 1/2”
RXAF-L50/1.0SUS316L500.1-1.0167260Rc2”
RXAF-L65/1.0SUS316L650.1-1.0177325Rc2 1/2”
RXAF-L80/0.6SUS316L800.1-0.62254203” flanged
RXAF-L100/0.6SUS316L1000.1-0.62404304” flanged
Other unspecified model/material/connection and DN100 above can be customized according to requirement.

General Information of our diaphragm type safety relief valves

Safety relief valve is opened and closed automatically according to the working pressure of the pressure system. Safety valve is generally installed on the equipment of closed system or pipeline to keep the system safety. When the pressure in the equipment or pipeline exceeds the setting pressure of the safety valve, it will open automatically and relief the pressure to ensure that the medium pressure in the equipment and pipeline is under the setting pressures the equipment and pipeline can  work normally to avoid accidents and losses.

Design features:

- With Diaphragm structure spring and the pressure can be adjustable.

- The wetted parts are only the lower valve body and the diaphragm and they are assembled  with sealing rib which has good sealing effect and high sensitivity.

- Multiple materials of diaphragm are optional to meet the usage of different environments and scenarios.

Technical Parameters
Connection typeThread, flange etc. and can be customized
Adjustable pressure0-1.0MPa, 0-2.0MPa
Safety test pressure1.5 times the maximum input pressure
Applicable temperature-60℃ to +300℃ (customizable）
Available materials
Materials for Lower valve bodyPVC,SS304,SS316L,Hastelloy, PTFE,PVDF,PP, carbon steel etc.and can be customized
materials for diaphragmPTFE composite NBR,EPDM etc.
Material for upper valve bodyNylon,PVC, carbon steel , SS304,SS316L etc.and can be customized


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