First, the piston-type steam pressure relief valve does not decompression or decompression failure and direct through several reasons:

1, the main valve or pay valve seal surface has dirt, can remove dirt clean.

2, the main valve or pay valve seal surface damage, will be sealed for grinding repair or replacement.

3, the main, pay disc spring fatigue or broken, replace the new spring.

4. The feedback channel C hole is blocked to clear the dirt in the channel.

5, the diaphragm fatigue or damage, replace the diaphragm.

6, piston cylinder wear or corrosion, processing correction or replacement of pistons.

7, piston ring groove and piston ring jammed, remove the piston cleaning.

8, the valve body cavity is filled with condensate, release the screw plug discharge condensate.

Second, the solution to the Steam method

1, cleaning the valve cover in the dislocation, remove the valve cover positioning after installed.

2, the top gasket shift block through the hole, so that the gasket hole alignment in and out of the hole.

3, into the pay valve channel hole plugging, remove the valve cover Clear Channel dirt.

First, the piston-type steam pressure relief valve does not decompression or decompression failure and direct through several reasons:

1, the main valve or pay valve seal surface has dirt, can remove dirt clean.

2, the main valve or pay valve seal surface damage, will be sealed for grinding repair or replacement.

3, the main, pay disc spring fatigue or broken, replace the new spring.

4. The feedback channel C hole is blocked to clear the dirt in the channel.

5, the diaphragm fatigue or damage, replace the diaphragm.

6, piston cylinder wear or corrosion, processing correction or replacement of pistons.

7, piston ring groove and piston ring jammed, remove the piston cleaning.

8, the valve body cavity is filled with condensate, release the screw plug discharge condensate.

Two, does not pass the steam

1, cleaning the valve cover in the dislocation, remove the valve cover positioning after installed.

2, the top gasket shift block through the hole, so that the gasket hole alignment in and out of the hole.

3, into the pay valve channel hole plugging, remove the valve cover Clear Channel dirt.