If the flow of some pumps varies strongly with pressure, a back pressure valve can be installed at the pump outlet, keeps the pump output flow stable, in this case the back pressure valve is normally set to the pump working pressure or slightly below it. The check valve on the outlet line prevents backflow of liquid, the back pressure valve maintains a constant pressure at the pump outlet.
Manual control
Air operated control
Pilot control
Electric control
Electrical proportional model
● Provides a pressure differential on both sides of the back pressure valve piping
● Prevents siphoning, Eliminates dosing variations caused by pressure fluctuations at the injection point
● Used together with pulse dampers to reduce water-hammer damage to the system
● Protects piping, elbows and fittings, reduces the impact of pressure fluctuations
● Delivers its full effect only when used with other line components such as pulse dampers
| ➣ control pressure control range: 0-1bar, 0-3bar, 0-7bar, 0-10bar |
| Safety Test Pressure: 150% max. Rated pressure |
| Temperature Range: -40℃ to ＋100℃(above 100℃ consult technical) |
| Internal Leakage Rate: Without gas leakage |
| Cv value: 0.6, 1.2, 2, 2.6, 3.8, 5.1, 8, 11, 13, 17, 25, 36, 50, 75 |
| Valve Body: 316L, 304, C276, TA2, PVC, PVDF, PTFE, stainless steel pTFE-lined |
| Diaphragm: 316L, C276, PTFE, NBR, VITON, EPDM, PEEK, PTFE composite diaphragm |
| O-ring: NBR, VITON, EPDM, PTFE, RPTFE |
| Valve Seat: PTFE, PCTFE, PEEK, Vespel, 316L |
| Spring: 316L |
| Plug Stem: 316L |
| ORDERING INFORMATION | |||||||
| Series models | Body material | Body port layout | Nominal Diameter (DN) | Connection RC/NPT | Control pressure | Diaphragm | Pressure Gauges |
| WBF back pressure valve HTWBFHigh Temperature Back Pressure Valves AWBF air operated back pressure valve XWBF pilot back pressure valve LWBF liquid back pressure valve EWBF motorised back pressure valve EAWBF proportional back pressure valve | L:316L S:304 C:C276 T:TA2 P:PVC PD:PVDF PF:PTFE CF: PTFE-lined | A B | 6 32 8 40 10 50 15 65 20 80 25 100 | 1/8" 1.25" 1/4" 1.5" 3/8" 2" 1/2" 2.5" 3/4" 3" 1" 4" Flanged connection available on request, code: F | I:0-1bar H:0-3bar G:0-7bar Q:0-10bar | 1, 316L 2, C276 3, PTFE 4, NBR 5, VITON 6, EPDM 7, PEEK 8, PTFE composite diaphragm | G: With pressure gauge (MPa) P: With pressure gauge (psig/bar) W: Without pressure gauge |
