Back Pressure Valve

What is a back pressure valve ?

YB7 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. It 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 YB7, ensure pump get the best protection, guarantee long-term stability for safe operation system.

How Do Back Pressure Valves Work?

This valve is self-support type, do axial movement along with valve disc by spring force function, so as to generate differential pressure around the back pressure valve. Meanwhile, the valve seat hole opening bigger and bigger gradually until pressure differential reaches the setting point.


In order to make the valve achieve to the best performance, BPV should be installed in downstream of the important protected valve, since valve outlet velocity is high, the installation location should be close deaerator or water supply tank.


Be easy to operation and maintenance. We can provide installation and maintenance manuals.

Valve size

DN25~DN150(1″-6″)Standard size: DN25~DN150(1″-6″)

Pressure range

Nominal pressure range: PN10~PN400(ANSI 150Lbs~ANSI 2500Lbs).Another pressure range is according to requirements.


Flange connection standard is according to DIN or ANSI, another standard (e.g. ISO, BS, JIS, NF) can be customized.

How do a back pressure valves Install?

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.

Back Pressure Valve Install
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
YB 7 Nominal pressure Body Material Nominal Diameter Structure ytpe
Back Pressure Valve 7 serives PN16=PN16
Class 150LB
D=Water type
F=Flange connection
S = Overflow function
For example 7 series BPV, Class 1500#, body maerial is A105, diameter 2", flange type connection,
Model : YB7-PN40-C-50-F
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