The purpose of Back Pressure Valves is to improve the efficiency of chemical feed systems by providing a steady back pressure to the chemical dosing pump. These valves find extensive application in various industries, such as chemical, water treatment, and laboratory. Furthermore, they are compatible with different kinds of corrosive liquids and even air.
Basic information of PVDF Back Pressure Valves:
Diaphragms: PTFE composite NBR,EPDM etc.
Material for upper valve body: Nylon,PP,PVC,PVDF or customized
Material for lower valve body: PVDF
Adjustable pressure: 0-1.0MPa
Connection type: Thread,Flange and can be customized
Model of PVDF Back Pressure Valves
| Model | Material | Nominal Dia.（mm） | Setting Pressure (MPa) | Dimension | Standard connection | |
| Lower Valve Body Dia.(mm) | Total Height(mm) | |||||
| RXBF-T6/1.0 | PVDF | 6 | 0.1-1.0 | 64.7 | 82 | Rc1/8” |
| RXBF-T8/1.0 | PVDF | 8 | 0.1-1.0 | 64.7 | 87 | Rc1/4” |
| RXBF-T10/1.0 | PVDF | 10 | 0.1-1.0 | 64.7 | 89 | Rc3/8” |
| RXBF-T15/1.0 | PVDF | 15 | 0.1-1.0 | 64.7 | 94 | Rc1/2” |
| RXBF-T20/1.0-N | PVDF | 20 | 0.1-1.0 | 64.7 | 104 | Rc3/4” |
| RXBF-T20/1.0 | PVDF | 20 | 0.1-1.0 | 87 | 123 | Rc3/4” |
| RXBF-T25/1.0 | PVDF | 25 | 0.1-1.0 | 87 | 128 | Rc1” |
| RXBF-T32/1.0 | PVDF | 32 | 0.1-1.0 | 117 | 175 | Rc1 1/4” |
| RXBF-T40/1.0-N | PVDF | 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 |
