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Replacement of the rig accessories throttle valve: 1. Replace the valve plate and valve seat: Remove the valve chamber pressure, remove the bonnet bolts, and remove the valve plate and the valve cover. Remove the grooved round nut, the switch pin, the hexagonal screw, and the front and rear stopper caps, then replace the cylindrical valve plate and replace the valve seat. When cleaning the valve chamber, special care should be taken at the sealing surface. To replace the new valve plate and valve seat, fill the gap between the valve plate and the boss portion of the valve cover with sealing grease, and fill the inside of the upper cover with calcium-based lubricating oil to lubricate the bearing.
2, replace the lip seal packing: perform first remove the valve chamber pressure, and then remove the shield, round nut, hand wheel, bearing gland, bearing, packing gland, and then replace the lip seal packing.
3, replace the bearing: remove the guard, round nut, hand wheel, bearing cover, then replace the bearing. To replace the lower bearing, the stem nut must be removed. The bearing clearance is adjusted by the bearing cover. After the adjustment is completed, the rotating handwheel should be flexible and free of jamming.
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September 23, 2021