Oil return process:The plunger supplies oil upward. When the chute on the plunger communicates with the oil return hole on the sleeve, the low pressure oil passage of the pump oil chamber communicates with the middle hole, radial hole and chute of the plunger head. The oil pressure suddenly drops, and the oil delivery valve closes flexibly under the action of the spring force to supply oil one after another.　　 After that, the plunger will move up again. When the cam's protrusion is turned over, the plunger will move down again under the action of the spring. Now the next cycle begins.　　 The above is the information introduction brought to you by the closed plunger pump manufacturer. For more related knowledge introduction, please pay attention to our official website.Related products:Vacuum Pump
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