discount 70% in 2018-09-18 to 2018-09-20
price: USD$ 59.50
freight :USD$7.00,(Postal parcel)
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Back pressure valve through built-inSpringElastic force to achieve action: when the system pressure is smaller than the set pressure, the diaphragm is blocked by the spring forcePipingWhen the system pressure is greater than the setting pressure, the diaphragm compression spring, the pipeline is connected, the liquid through the back pressure valve.
In the condition that the pipeline or the equipment vessel is unstable, the back pressure valve can keep the pressure required by the pipeline, so that the pump can output normallyflow. At the end of the pump, siphon phenomenon occurs due to gravity or other effects. At this point, the backpressure valve can reduce the flow and pressure fluctuation caused by siphon. For metering pumps and so onPositive displacement pumpExcessive delivery occurs when working at low system pressure. In order to prevent similar problems, the outlet of metering pump must be at least 0.7Bar back pressure, generally through the installation of back pressure valve at the outlet of metering pump to achieve the purpose.
1. exportsThe ConduitThe check valve is used to prevent liquid backflow, and the backpressure valve is used to maintain a constant pressure at the pump outlet.
2. can be used in a system that is not very strictSafety valveUse。
The fluid enters from the back pressure valve and is blocked by the diaphragm, so the fluid produces upward pressure on the diaphragm. When the pressure is large enough, the spring is compressed, the fluid rises from the diaphragm to form a channel and flows out from the outlet of the backpressure valve; if the fluid pressure is not enough, the pressure will be suppressed so that the inlet can be formedPressure riseUntil reachingRated pressureThe diaphragm forms a passage.
Back pressure valve rated pressure can be adjusted, usually by adjusting the upper end of the spring, so as to adjust the length of the spring to achieve.