Our back pressure valves made of PTFE are designed to prevent liquid from flowing or siphoning caused by gravity. They can effectively reduce flow due to siphon and regulate pressure fluctuations. Our valves find extensive usage in the chemical industry, water treatment plants, laboratories, and are compatible with air and a range of corrosive liquids.
Basic information of PTFE Series Back Pressure Valves
Diaphragms: PTFE composite NBR or customized
Material for upper valve body: Nylon,PP,PVC,PTFE or customized
Material for lower valve body: PTFE
Adjustable pressure: 0-1.0MPa
Connection type: Thread,Flange and can be customized
Models of PTFE Back Pressure Valve
| Model | Material | Nominal Dia.（mm） | Setting Pressure (MPa) | Dimension | Standard connection | |
| Lower Valve Body Dia.(mm) | Total Height(mm) | |||||
| RXBF-F6/1.0 | PTFE | 6 | 0.1-1.0 | 64.7 | 82 | Rc1/8” |
| RXBF-F8/1.0 | PTFE | 8 | 0.1-1.0 | 64.7 | 87 | Rc1/4” |
| RXBF-F10/1.0 | PTFE | 10 | 0.1-1.0 | 64.7 | 89 | Rc3/8” |
| RXBF-F15/1.0 | PTFE | 15 | 0.1-1.0 | 64.7 | 94 | Rc1/2” |
| RXBF-F20/1.0-N | PTFE | 20 | 0.1-1.0 | 64.7 | 104 | Rc3/4” |
| RXBF-F20/1.0 | PTFE | 20 | 0.1-1.0 | 87 | 123 | Rc3/4” |
| RXBF-F25/1.0 | PTFE | 25 | 0.1-1.0 | 87 | 128 | Rc1” |
| RXBF-F32/1.0 | PTFE | 32 | 0.1-1.0 | 117 | 175 | Rc1 1/4” |
| RXBF-F40/1.0-N | PTFE | 40 | 0.1-1.0 | 117 | 185 | Rc1 1/2” |
| Other unspecified model/material/connection can be customized according to requirement. | ||||||
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 type | Thread, flange etc. and can be customized |
| Adjustable pressure | 0-1.0MPa, 0-2.0MPa |
| Safety test pressure | 1.5 times the maximum input pressure |
| Applicable temperature | -60℃ to +300℃ (customizable） |
| Available materials | |
| Materials for Lower valve body | PVC,SS304,SS316L,Hastelloy, PTFE,PVDF,PP, carbon steel etc.and can be customized |
| materials for diaphragm | PTFE composite NBR,EPDM etc. |
| Material for upper valve body | Nylon,PVC, carbon steel , SS304,SS316L etc.and can be customized |
