Powers 595 Series 11 Self-Operating Temperature Regulators - Type DB & DS Double Seat, Balanced - Manual (Page 7)

6. Figure 10A.1" to 2": Loosen and remove bonnet [20] from
valve body [26].
7. Carefully pull out poppet [24] and stem assembly [30].
Check the stem. It must have a polished surface that is free
of roughness and pitting. Replace any parts if necessary.
8. Figure 13. Remove packing gland [14], and all packing
components [15a-15e].
9. Clean packing chamber, taking care not to scratch seating
surfaces. Be sure chamber is free of dirt and grease.
10. 1” to 2” valves: Install a new gasket [21] between bonnet
and valve body. Replace bonnet [20] and stem [30]
into valve body.
NOTE: You must replace the bonnet and stem before
attempting to insert the packing. Otherwise, you may tear
the packing rings.
9. lift off yoke and bridge
Yoke and Bridge
Locknut
Double
Seated
Poppet
Assembly
Stem Head
Retainer
Bonnet
Body
10 A ,. (DA, 1" to 2") remove bonnet from valve
11. 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.
12. For EP V-rings, lubricate the rings fi rst.
Slide each V-ring [15b] over the stem and carefully push it
into the packing chamber.
13. Place the packing gland spacer [15a] on top of the bonnet.
14. Thread the packing gland assembly [14] into the bonnet.
Tighten the gland assembly against the spacer.
15. With valve plug fi rmly seated (stem in full down position)
screw stem extension [4] to the dimension shown in
Figure 15 and tighten into place with hex nut [12].
16. Assemble the remaining parts in reverse order.
RA: To replace the valve plug / replace the packing
Follow steps 1-5, To fully disassemble regulator
from valve.
1. Figure 11. Use a 5/16" wrench on the fl ats of the stem exten-
sion [4] and a 7/16" wrench on the hex nut [12] to loosen and
remove them.
2. Figure 12A. 1” to 2” valves: Loosen and remove valve cap.
5/16" Stem
Extension
7/16"
Hex Nut
Stem Assembly
11.(RA) disconnect stem extension from stem
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