Hydraulic press one-way valve does not work the reasons and elimination of what?

This failure means that the reverse oil (P2PI) can also pass through the check valve, but sometimes the front oil can not. The bow-shaped hydraulic press is composed of the main engine and the control mechanism. The main part of the hydraulic press includes the body, the main cylinder, the ejector cylinder and the filling device. The power mechanism of oil press factory is composed of oil tank, high pressure pump, low pressure control system, motor, various pressure valves and direction valves. Hydraulic press a special hydraulic oil as the working medium, through the hydraulic pump as the power source, by the force of the pump to make the hydraulic oil through the hydraulic pipeline into the cylinder/piston, then the cylinder/piston has several sets of seals that work together. The seals are different in different positions, but they all act as seals to keep the hydraulic oil from leaking.

(1) spool

1 because the spool edge burrs not clean (see just used valve) , check spool stuck in the open position. The clearance between the outside diameter of the valve core and the inside diameter of the valve body D is too smallEspecially when new check valves are not worn out. Seat: in contact with the spool of the line dirt adhesion or spalling. At this point, check the seat and spool contact line insideEdge, if dirty, should be cleaned; if there is a gap, should knock out the seat and replace.

(2) bodyThe Burr on the edge of the groove in the valve body hole is not removed, and the one-way valve core is stuck in the open position. Can be cleaned to remove burrs.The dirt enters into a valve body hole and the valve core in the coordination working gap and jams the valve core.3 the valve core outside diameter m and the valve body bore diameter d work clearance is too large, so that the valve core can be radial changes floating, and just in the figure at C, there is dirt stick, the valve core deviationSeat and center (eccentricity distance e) , resulting in increased risk of internal leakage, one-way valve spool more open larger.