Stuffing Box Gate Valve

The stuffing box bolts and nuts may have been tightened down unevenly during assembly.

Stuffing box gate valve.

If this does not stop the leakage repack the stuffing box. Designed to provide long service in high pressure pump and standpipe manifold systems our rugged valves created tight shutoff at every closing cycle and outperform even after long. If the stem of a globe valve is in good condition stuffing box leaks can usually be stopped by setting up on the gland. Loosen and retighten stuffing box bolts and nuts evenly.

Inspect all of stem gate the valve should be all the way open to inspect the entire stem gate. The design provides extra packing for a more reliable stem seal or sufficient depth for packing with an optional lantern ring in the middle. If the leak persists a bent or scored valve stem may be the cause of the trouble. The gland must not be set up or packed so tightly that the stem binds.

The speaker mentioned that an ideal stuffing box contains 5 rings of packing and that deeper stuffing boxes are not preferred as only the two packing rings nearest the outside of the valve are fully compressed by the force from the packing follower. Inspect the gland the gland should be able to freely enter the stuffing box all the way. Deep stuffing boxes are standard on gate and globe valves. Gate valves forum manufactures mud gate valves to meet the tough demands of deep high pressure drilling applications up to 7 500 pounds per square inch psi.

Some factors to consider include. Look down the valve box to see if it is to close to the operating nut.