(Check valve or check valve)
Function: only allow positive flow of oil, not allowed to reflux.
Category: Straight, right angle
Structure: body, valve cone, steel ball, spring and so on
How it works: When the flow of liquid flows in from the inlet, A → B
When the flow of liquid flows from the oil outlet, A → B
Opening pressure: 0,04--0,1MPa
Do back pressure valve: Pk = 0.2-0.6 MPa 3