Powers 595 Series 11 Self-Operating Temperature Regulators - Packing - Manual (Page 3)

Form TB-237 v4 0510 Page 3
SPLIT RING PACKING
The split ring packing is made of woven teflon to provide low
friction and a degree of self lubrication. This type of packing
is recommended for replacement or repair only, but may be
ordered through a Special Order only for a new valve.
Valve lubricators and lubricants are recommended to
pro-long packing life and improve sealing of the controlled
medium. Part #590-165A is the lubricant (Dow Corning
Number II 1 silicone), 5.3 oz. tube, Part #590-184A is the
valve stem lubricator (Dow Corning Number 111 silicone).
Coat new rings with recommended lubricant, slip rings
around stem, staggering cuts, push down as far as possible
and tighten packing gland nut sufficiently to compress the
packing rings toward the bottom of the packing gland.
Loosen packing gland nut and readjust to ‘"finger tight" only,
Pack the bonnet with recommended lubricant.
Note: Single seat 2-way screwed valves should be
repacked in the closed position.
PartIal Repacking...
The top three packing rings can be replaced without dis-
assembling the valve, to minimize servicing time for critical
system operation. However, replacement of all four packing
rings is recommended to obtain optimum packing perform-
ance and life.
Loosen packing gland nut. Remove the three packing rings
from above the lubricator spacer with a pointed rod or pick.
CAUTION: Do not use a wrench on the packing gland
nut of valve stem.
Packing Gland Nut