First, the common problems of the metering pump piping system:
1. Problem 1: When there is no pressure at the outlet of the metering pump, the actual flow rate of the pump is much larger than the rated flow rate, and the flow rate is basically unchanged when the flow rate is adjusted.
2. Problem 2: After the pump is turned on, the vibration of the outlet pipe is quite severe.
Second, the solution of the metering pump piping system:
1. Solution to Problem 1: The back pressure valve is added at the outlet of the metering pump. The back pressure valve can stabilize the flow of the metering pump while ensuring the metering accuracy while stabilizing the line pressure.
2. Solution to Problem 2: Install a pulsation damper at the outlet of the metering pump (if there is no pressure at the outlet of the metering pump, it is best to use it at the same time as the back pressure valve); the fluid at the discharge end will be in the tube at the start of the pump due to the inertia resistance. The road produces a pulsating impact force. This is a peculiar phenomenon of reciprocating pumps caused by sudden acceleration of the liquid in the pipe. The pulsation damper can effectively prevent the vibration caused by the pulse.