PTFE Back Pressure Valve

PTFE Back Pressure Valves / Pressure Relief Valves

PTFE Back pressure valve is used to prevent liquid from flowing or siphoning due to Gravitation. At this time, the back pressure valve can reduce the flow due to siphon and control the pressure fluctuations.
The back pressure valves we manufactured are widely used in chemical industry, water treatment, laboratory etc., also our back pressure valves are suitable for air and various kind of corrosive liquids.

Connection typeThread, flange etc. and can be customized
Adjustable pressure0-0.3MPa，0-1.0MPa
Safety test pressure1.5 times the maximum input pressure
Applicable temperature-5℃ to +80℃ for EPDM lining PTFE diaphragm
-5℃ to +80℃ for PTFE diaphragm
Available materials
Materials for Lower valve bodyPVC,SS304,SS316L,PTFE,PVDF,PP,carbon steel etc
materials for diaphragmEPDM lining PTFE diaphragm，PTFE diaphragm
Material for upper valve bodyPVC,carbon steel(nickel plated,black oxide etc.), SS304,SS316L
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Design features of PTFE Back Pressure Valve

  • With Diaphragm structure spring and the pressure will be adjustable
  • The medium contacting 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
  • EPDM lining PTFE with Cloth type diaphragm has a very good sealing effect and long service life, The PTFE type diaphragm has a very good performance in high temperature resistance corrosion resistance.

Specifications and models

ModelsMaterialDia.（mm）Pressure（MPa）SizeConnection
D(mm)Lower valve bodyH(mm)
RXBF-P6/1.0PVC60.1-1.064.782Rc1/8”
RXBF-P8/1.0PVC80.1-1.064.787Rc1/4”
RXBF-P10/1.0PVC100.1-1.064.789Rc3/8”
RXBF-P15/1.0PVC150.1-1.064.794Rc1/2”
RXBF-P20/1.0-NPVC200.1-1.064.7(For pumps flow ≤250L/h)104Rc3/4”
RXBF-P20/1.087123
RXBF-P25/1.0PVC250.1-1.087128Rc1”
RXBF-P32/1.0PVC320.1-1.0117175Rc1+1/4”
RXBF-P40/1.0-NPVC400.1-1.0117(for pumps flow ≤2500L/h)185Rc1+1/2”
RXBF-P40/1.0137240
RXBF-P50/1.0PVC500.1-1.0167260Rc2”
RXBF-P65/1.0PVC650.1-1.0177325Rc2+1/2”
RXBF-P80/0.6PVC800.1-0.6230420Rc3”
RXBF-P100/0.6PVC1000.1-0.6250430Rc4”
RXBF-S6/1.0SUS304/316L60.1-1.064.782Rc1/8”
RXBF-S8/1.0SUS304/316L80.1-1.064.787Rc1/4”
RXBF-S10/1.0SUS304/316L100.1-1.064.789Rc3/8”
RXBF-S15/1.0SUS304/316L150.1-1.064.794Rc1/2”
RXBF-S20/1.0-NSUS304/316L200.1-1.064.7((for pumps flow≤250L/h)104Rc3/4”
RXBF-S20/1.087123
RXBF-S25/1.0SUS304/316L250.1-1.087128Rc1”
RXBF-S32/1.0SUS304/316L320.1-1.0117175Rc1+1/4”
RXBF-S40/1.0-NSUS304/316L400.1-1.0117185Rc1+1/2”
RXBF-S40/1.0137240
RXBF-S50/1.0SUS304/316L500.1-1.0167260Rc2”
RXBF-S65/1.0SUS304/316L650.1-1.0177325Rc2+1/2”
RXBF-S80/0.6SUS304/316L800.1-0.62254203”flange type
RXBF-S100/0.6SUS304/316L1000.1-0.62404304”flange type

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