Relief valve is a pressure to adjust the export pressure below the import pressure control valve, when it comes to the failure of the relief valve, one of the most common problems is pressure fluctuations, then, in response to this situation, how to exclude it?

Failure analysis and elimination method of pressure relief valve

Failure phenomenon: unstable pressure fluctuation

Failure Analysis:

1, oil mixed with air.

2. The damping hole is sometimes blocked.

3, sliding valve and valve body hole roundness exceeding the regulation, so that the valve jammed.

4, spring deformation or in the sliding valve jammed, so that the slide valve moving difficult or too soft spring.

5, the steel ball is not round, the steel ball and the valve seat match is not good or the cone valve installs incorrectly.

Exclusion Method:

1, the elimination of oil in the air.

2. Clean the damping hole.

3. Repair and research valve hole and slide valve.

4. Replace the spring.

5, the replacement of steel ball or open taper valve adjustment.

Decompression valve failure phenomenon: two times pressure rise is not high

Failure Analysis:

1. External leakage.

2, cone valve and valve seat contact is bad.

Exclusion Method:

1, the replacement of seals, fastening screws, and ensure the torque force.

2, repair or replacement.

Decompression valve failure Phenomenon: no effect of pressure reduction

Failure Analysis:

1, leaking oil mouth, drain tubing and back to the tubing connected, and there is oil back pressure.

2, the main valve core in the full open position card.

Exclusion Method:

1, the drain pipe must be separated from the return oil pipeline, separate back into the tank.

2, repair, replacement parts, check the oil.

Small pressure relief valve, to daily life has brought a great impact, reasonable use of water at the same time, to avoid a large number of pressure relief valve.