Safety Relief Valve

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PP Safety Relief Valve

PP Safety Relief Valve


Polypropylene(PP) safety Relief Valves are widely used in chemical industry, water treatment, laboratory etc. And suitable for air and various kind of corrosive liquids.The PP material safety valve we produce has good corrosion resistance and can withstand the erosion of various chemical substances, making it suitable for a variety of liquid environments. The pressure relief valve made of PP material can be installed in any position for easy maintenance and inspection, improving the flexibility of use. Compared with other materials, PP material is easy to process and has relatively low manufacturing costs, which also reduces the production cost of pressure relief valves. Therefore, it is widely used in chemical dosing systems and other fluid control systems that require cost control.


Basic information of PP Series Back Safety Relief Valves

Diaphragms: PTFE composite NBR,EPDM etc.

Material for upper valve body: Nylon,PP

Material for lower valve body: PP

Adjustable pressure: 0-1.0MPa

Connection type: Thread,Flange and can be customized


Model of PP Safety Relief Valve

ModelMaterialNominal Dia. (mm)Setting Pressure (MPa)DimensionStandard Connection
Lower Valve Body Dia. (mm)Total Height (mm)
RXAF-B6/1.0PP60.1-1.064.782Rc1/8”
RXAF-B8/1.0PP80.1-1.064.787Rc1/4”
RXAF-B10/1.0PP100.1-1.064.789Rc3/8”
RXAF-B15/1.0PP150.1-1.064.794Rc1/2”
RXAF-B20/1.0-NPP200.1-1.064.7104Rc3/4”
RXAF-B20/1.0PP200.1-1.087123Rc3/4”
RXAF-B25/1.0PP250.1-1.087128Rc1”
RXAF-B32/1.0PP320.1-1.0117175Rc1 1/4”
RXAF-B40/1.0-NPP400.1-1.0117185Rc1 1/2”
RXAF-B40/1.0PP400.1-1.0137240Rc1 1/2”
RXAF-B50/1.0PP500.1-1.0167260Rc2”
RXAF-B65/1.0PP650.1-1.0177325Rc2 1/2”
RXAF-B80/0.6PP800.1-0.6230420Rc3”
RXAF-B100/0.6PP1000.1-0.6250430Rc4”
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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