Stuffing Box Gate Valve

The gland must not be set up or packed so tightly that the stem binds.

Stuffing box gate valve.

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. Inspect the gland the gland should be able to freely enter the stuffing box all the way. Some factors to consider include. If the stem of a globe valve is in good condition stuffing box leaks can usually be stopped by setting up on the gland.

If this does not stop the leakage repack the stuffing box. Note whether the gland nose is. 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. The design provides extra packing for a more reliable stem seal or sufficient depth for packing with an optional lantern ring in the middle.

The valve box may be interfering with the operating key. Deep stuffing boxes are standard on gate and globe valves. The stuffing box bolts and nuts may have been tightened down unevenly during assembly. 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.

Inspect all of stem gate the valve should be all the way open to inspect the entire stem gate. Look for burrs or scaling.