Hebei Lufeng Piping Equipment Co., Ltd.
Carbon /Alloy steel pipes, ERW steel pipes, API 5L LSAW&SSAW, ASME B16.9/MSS SP-75 BW pipe fittings, ASME B16.5/16.47 steel flanges, ASME B16.11/MSS SP-97 forged fittings, Knife gate valves, Butterfly
Back pressure valve is used to the applicable conditions that the common controlling system can not be used, as a kind of special pressure control valves, it commonly match with automatic recirculation valve to protect pump system.Back pressure valve is used to control upstream pressure, enables to achieve factory technological setting pressure value and system required pressure value, preventing vaporization and corrosion phenomena. Carefully matched technological condition between automatic recirculation valve and back pressure valve, ensure pump get the best protection, guarantee long-term stability for safe operation system.
This valve is self-support type, do axial movement along valve disc by spring force function, so as to generate differential pressure around back pressure valve. Meanwhile, valve seat hole opening bigger and bigger gradually until pressure differential reaches setting point.
In order to make the valve to achieve to best performance, BPV should be installed in downstream of the important protected valve, since valve outlet velocity is high, installation location should be close deaerator or water supply tank.
Be easy to operation and maintenance.We can provide installation and maintenance manual.
DN25~DN150(1″-6″)Standard size: DN25~DN150(1″-6″)
Nominal pressure range: PN10~PN400(ANSI 150Lbs~ANSI 2500Lbs).Other pressure range is according to requirements.
Flange connection standard is according to DIN or ANSI, other standard (e.g. ISO, BS, JIS, NF) can be customerized.
| Body material
Sealing material | A105 | LF2 | F304 | F316 |
| NBR | -20～+100 | -30～+100 | -30～+100 | -30～+100 |
| FKM | -20～+200 | -40～+200 | -40～+200 | -40～+200 |
| PTFE | -20～+230 | -40～+230 | -80～+230 | -80～+230 |
| Stainless steel gasket | -20～+300 | -40～+300 | -196～+300 | -196～+300 |
In order to make the valve to achieve best performance, YB7 should be installed in the downstream of the protected valve, since valve outlet velocity flow is high, installation location should near close to deaerator or tank.
| NO | Name | Material( Commonly used) | |||
| 1 | Body | A105 | LF2 | F304 | F316 |
| 2 | Elastic block circle | 2Cr13 | 2Cr13 | 304 | 316 |
| 3 | Seat | 2Cr13+STL | 2Cr13+STL | 304+STL | 316+STL |
| 4 | O ring | EPDM | EPDM | EPDM | EPDM |
| 5 | Trim | 2Cr13+STL | 2Cr13+STL | 304+STL | 316+STL |
| 6 | Spring | 60Si2Mn | 60Si2Mn | 1Cr18Ni9Ti | 316 |
| 7 | Pressed nut | 2Cr13 | 2Cr13 | 304 | 316 |