MAINTENANCE
Normal stem packing wear can be compensated for by tightening the packing gland nut
(except 91-200 Series). If all of the adjustment to the packing gland nut has been
made, remove the lever and packing gland nut and add one or two replacement
bearings on top of the old packing. Reassemble the lever and packing gland nut.
General repair of the valve can be made by:
1. Close valve.
2. Remove retainer by turning clockwise.*
3. Pry out the top seat, being careful not to damage the ball.
4. Push ball out of body with finger.
5. Remove packing gland nut by turning counterclockwise and push stem down into
body to remove.
6. Remove all seats and seals. To facilitate removal of the stem packing, cut with
knife.
7. Replace all seats and seals as furnished in the Service Kit. Inspect the ball and
stem for excessive wear or damage and replace if necessary.
8. Reverse the above procedure to reassemble using an anaerobic sealant on the
retainer threads. NOTE: VALVES IN OXYGEN SERVICE CAN ONLY BE SEALED
WITH A COMPATIBLE SEALANT.
* A suitable tool for removing the retainer can be made from a square piece of steel by
using the dimensions shown below.
VALVE SIZE
1/2
3/4
1
1-1/4
1-1/2
2
STEEL SIZE
5/16
13/32
1/2
5/8
3/4
15/16
