What is the function of the two DN20 connections at the front and back of the pump?
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What is the function of the two DN20 connections at the front and back of the pump?
The inlet is used to empty the material, while the outlet is used for exhaust; it can also serve as a purging interface.
The inlet can discharge sludge, particles, etc. Venting the exhaust gas is necessary, especially after special maintenance or when the pump is first started.
The inlet is for waste discharge and the outlet is for air release; this is the usual setup； If the pressure gauge on the outlet is equipped with a two-valve assembly (that allows for air release), it may not be necessary to include an air release point on the outlet pipe, but a drain point can be added
The drain port when repairing the pump, and venting the upper port before starting the pump
Entry: Empty before cleaning the filter； Export: Venting during pumping (in some cases, direct discharge to the atmosphere is not allowed). None of them have anything to do with purging!
The inlet pipeline of the pump is a drain line, and the outlet of the pump is also used for draining, to remove any liquid remaining behind the check valve