Back Pressure Valve

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Stainless Steel Back Pressure Valve

Stainless Steel Back Pressure Valve


The primary function of a back pressure valve is to prevent liquid from flowing or siphoning due to gravitational forces. In addition, it helps to reduce flow and control pressure fluctuations.
Our stainless steel back pressure valves find extensive usage in various industries including chemical, water treatment, and laboratory settings. Furthermore, these valves are well-suited for air and a range of corrosive liquids.



Basic information of Stainless Steel Series Back Pressure Valves:

Adjustable pressure: 0-1.0MPa,0-2.0MPa,

Diaphragms: PTFE composite NBR etc.

Material for upper valve body: Carbon steel with spray treatment ,SS304,SS316L etc.

Material for upper valve body: 33304,SS316L,Hastelloy etc.

Connection type: Thread,Flange and can be customized

Model parameter of Stainless Steel 304 Back pressure valves

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

Model parameter of Stainless Steel 316L

ModelMaterialNominal Dia.（mm）Setting Pressure (MPa)DimensionStandard connection
Lower Valve Body Dia.(mm)Total Height(mm)
RXBF-L6/1.0SUS316L60.1-1.064.782Rc1/8”
RXBF-L8/1.0SUS316L80.1-1.064.787Rc1/4”
RXBF-L10/1.0SUS316L100.1-1.064.789Rc3/8”
RXBF-L15/1.0SUS316L150.1-1.064.794Rc1/2”
RXBF-L20/1.0-NSUS316L200.1-1.064.7104Rc3/4”
RXBF-L20/1.0SUS316L200.1-1.087123Rc3/4”
RXBF-L25/1.0SUS316L250.1-1.087128Rc1”
RXBF-L32/1.0SUS316L320.1-1.0117175Rc1 1/4”
RXBF-L40/1.0-NSUS316L400.1-1.0117185Rc1 1/2”
RXBF-L40/1.0SUS316L400.1-1.0137240Rc1 1/2”
RXBF-L50/1.0SUS316L500.1-1.0167260Rc2”
RXBF-L65/1.0SUS316L650.1-1.0177325Rc2 1/2”
RXBF-L80/0.6SUS316L800.1-0.62254203” flanged
RXBF-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 back pressure valves

The Back Pressure Valve functions as an anti-siphon valve, preventing liquid flow or siphoning due to gravity. Additionally, the valve can decrease flow due to siphoning and regulate pressure fluctuations. Anti-siphon valves only permit water to flow in one direction.

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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