Failure of check valves in metering pumps when operating under high-pressure conditions
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Our company currently has a Hanbang metering pump with a flow rate setting of 20 ml/min. When operating at atmospheric pressure, it provides accurate metering, and there is no significant pulsation in the fluid output； However, when operating at high pressure (8-12 Mpa), the measurement differences are significant, and the liquid output pulses are large. I’m not sure what the reason for this is
I’m not very familiar with pumps, so I suggest the original poster ask a manufacturer – after all, manufacturers that specialize in production are more experienced in this area. If you have questions and ask for advice, some people will respond to you
Is the outlet end a closed-type reactor?
The suction side of the pump is at atmospheric pressure, while the outlet side is part of a high-pressure system
This is normal; if the pulses are particularly large, it indicates a problem with the valve. You can contact 13589226713 if there is anything.
Adding a check valve at the pump outlet, along with a damper, should make things much better
How significant is the difference in measurement? By how much is the traffic lower?
Reaching such flow rates and pressures is not easy; attention must be paid to various factors, and it’s not necessarily just the check valve that is at fault. What type of metering pump is this – plunger-type or hydraulic diaphragm-type?