Powers 595 Series 11 Self-Operating Temperature Regulators - Type DB & DS Double Seat, Balanced - Manual (Page 8)

Stem
Body
Poppet Assembly
Anti Spin Sleeve
Stem Head Retainer
Valve Cap
12 A . (RA, 1" to 2" ) remove valve cap
Check the stem. It must have a polished surface that is
free of roughness and pitting. Replace any parts if necessary.
3. Unscrew plug from the stem retainer and replace.
4. Figure 13. Remove packing gland [14], and all packing
components [15a-15e].
5. Clean packing chamber, taking care not to scratch seating
surfaces. Be sure chamber is free of dirt and grease.
6. Insert plug and stem in valve body.
NOTE: You must replace the plug and stem before attempt-
ing to insert the packing. Otherwise, you may tear the
packing rings.
7. 1” to 2” valves: Screw valve cap into place and tighten.
2-1/2” to 4" valves: Install a new gasket [21] between the bot-
tom cap and body. Hold the bottom cap in place and secure
with the four cap screws.
8. For standard packing kits, install the parts as shown in
Figure 13.
Slide part(s) [15e], followed by [15d] and [15c] over the stem.
Gently push them into the packing chamber.
NOTE: Some kits do not include all the listed packing parts
(see page 12), but the order for part installation is the same.
9. For EP V-rings, lubricate the rings first.
Slide each V-ring [15b] over the stem and carefully push it
into the packing chamber.
10. Place the packing gland spacer [15a] on top of the bonnet.
11. Thread the packing gland assembly [14] into the bonnet.
Tighten the gland assembly against the spacer.
12. Figure 14. With poppet firmly seated (see chart below for
position), screw stem extension to the dimension given and
tighten into place with hex nut.
13. Assemble in reverse order.
13. packing components
Packing Kit
(15a-e) Packing Gland
Spacer
Bonnet
Packing
Gland
8
Top of Stem
Extension
Top of
Bonnet
Hex Nut
SEE TABLE BELOW
14. Stem extension dimensions
Stem Setting Dimension
(See Above)
Valve
Action
Valve Size
1"- 2"
DA
(Stem DOWN)
10-1/8" (+1/32, -0)
[257mm (+.79, -0)]
RA
(Stem UP)
10-11/32" (+0,-1/32)
[263mm (+0, -.79)]