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 type Thread, flange etc. and can be customized
Adjustable pressure 0-0.3MPa,0-1.0MPa
Safety test pressure 1.5 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 body PVC,SS304,SS316L,PTFE,PVDF,PP,carbon steel etc
materials for diaphragm EPDM lining PTFE diaphragm,PTFE diaphragm
Material for upper valve body PVC,carbon steel(nickel plated,black oxide etc.), SS304,SS316L

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

Models Material Dia.(mm) Pressure(MPa) Size Connection
D(mm)Lower valve body H(mm)
RXBF-P6/1.0 PVC 6 0.1-1.0 64.7 82 Rc1/8”
RXBF-P8/1.0 PVC 8 0.1-1.0 64.7 87 Rc1/4”
RXBF-P10/1.0 PVC 10 0.1-1.0 64.7 89 Rc3/8”
RXBF-P15/1.0 PVC 15 0.1-1.0 64.7 94 Rc1/2”
RXBF-P20/1.0-N PVC 20 0.1-1.0 64.7(For pumps flow ≤250L/h) 104 Rc3/4”
RXBF-P20/1.0 87 123
RXBF-P25/1.0 PVC 25 0.1-1.0 87 128 Rc1”
RXBF-P32/1.0 PVC 32 0.1-1.0 117 175 Rc1+1/4”
RXBF-P40/1.0-N PVC 40 0.1-1.0 117(for pumps flow ≤2500L/h) 185 Rc1+1/2”
RXBF-P40/1.0 137 240
RXBF-P50/1.0 PVC 50 0.1-1.0 167 260 Rc2”
RXBF-P65/1.0 PVC 65 0.1-1.0 177 325 Rc2+1/2”
RXBF-P80/0.6 PVC 80 0.1-0.6 230 420 Rc3”
RXBF-P100/0.6 PVC 100 0.1-0.6 250 430 Rc4”
RXBF-S6/1.0 SUS304/316L 6 0.1-1.0 64.7 82 Rc1/8”
RXBF-S8/1.0 SUS304/316L 8 0.1-1.0 64.7 87 Rc1/4”
RXBF-S10/1.0 SUS304/316L 10 0.1-1.0 64.7 89 Rc3/8”
RXBF-S15/1.0 SUS304/316L 15 0.1-1.0 64.7 94 Rc1/2”
RXBF-S20/1.0-N SUS304/316L 20 0.1-1.0 64.7((for pumps flow≤250L/h) 104 Rc3/4”
RXBF-S20/1.0 87 123
RXBF-S25/1.0 SUS304/316L 25 0.1-1.0 87 128 Rc1”
RXBF-S32/1.0 SUS304/316L 32 0.1-1.0 117 175 Rc1+1/4”
RXBF-S40/1.0-N SUS304/316L 40 0.1-1.0 117 185 Rc1+1/2”
RXBF-S40/1.0 137 240
RXBF-S50/1.0 SUS304/316L 50 0.1-1.0 167 260 Rc2”
RXBF-S65/1.0 SUS304/316L 65 0.1-1.0 177 325 Rc2+1/2”
RXBF-S80/0.6 SUS304/316L 80 0.1-0.6 225 420 3”flange type
RXBF-S100/0.6 SUS304/316L 100 0.1-0.6 240 430 4”flange type