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APPENDIX A
MAINTENANCE AND ASSEMBLY INSTRUCTIONS FOR PBM BALL VALVES
Two-Way Valves "SP" Series
1.)
PBM valves are designed with an "Adjust-o-Seal" feature. If the valves show signs of leakage due to normal
seat and seal wear, torque up the body bolts evenly alternating from body bolt to body bolt until leakage stops and valve
operates smoothly. The following should be noted with respect to torque on body bolts.
a. There should always be a space between end fittings and body initially. This is the adjust-o-seal feature
that allows for the external adjustment or the seats and seals.
b.
Valve body bolts should only be tightened until you reach the breakaway torque’s off the valve stem listed
below. (do not exceed maximum)
Valve Size
Breakaway Torque
1/4", 3/8", 1/2"
SP-12
4 ft/lbs.
3/4"
SP-13
5 ft/lbs.
1"
SP-14
7 ft/lbs.
1-1/4"
SP-15
11 ft/lbs.
1-1/2"
SP-16
16 ft/lbs.
2"
SP-17
20 ft/lbs.
2-1/2"
SP-18
32 ft/lbs.
3"
SP-19
44 ft/lbs.
4"
SP-20
68 ft/lbs.
6"
SP-22
150 ft/lbs.
8'
SP-24
250 ft/lbs.
2.)
If valve shows signs of leakage in stem area due to normal stem packing wear, tighten gland nut until leakage
stops and valve operates smoothly.
3.)
After all adjustments are made on the seats and seals and valve is bolted metal to metal, a new repair kit is
required. These parts come in kit form, each containing:
A7-11
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