Advertisement
SERVICE & REPAIR PROCEDURES
ESS3 & ESS4 Single Stage EDGE™ Series Regulators
DISASSEMBLY PROCEDURES
Refer to the exploded view for reference numbers [Shown in brackets]
1. Mount the Inlet Swivel Assembly Plug in the Bench Vise and firmly attach the Regulator.
2. Remove the Knob Decal [6], and remove the #10-32 Screw [7], Lock Washer
Washer
[8]
located inside the Knob [9]. The Knob can now be removed.
3. Remove the 5 (for ESS3) or 6 (for ESS4) Socket Head Cap Screws [10]. The Bonnet
can now be removed.
TIP: Be careful when removing the Bonnet, as the Diaphragm Assembly can
sometimes stick to it when disassembling.
4. Remove the Drive Screw [12], Guide Bushing [13], and Thrust Washer [11]. The Guide
Bushing can be separated from the Drive Screw by removing the #10-32 Screw
Washer
[14]
installed in the bottom of the Drive Screw.
TIP: Make sure you've got the Thrust Washer. If it's not sitting on top of the Drive
Screw, it may still be up inside the Bonnet.
5. Remove the Adjusting Spring [15], Diaphragm Assembly [4], and Back-Up Ring
so equipped), and then remove the Nozzle
6. Remove the Seat Assembly [18], Valve Spring [19], Gland [20], Friction Damper
and Bottom Guide
7. Remove the Relief Valve or Pipe Plug [27], Outlet Connection
necessary) from the Body.
8. Screw the Leverage Bar Tool RT-180 into the outlet port of the Body (lightly hand tight),
and use the bar to unscrew the Body off the Inlet Swivel [24].
TIP: Watch the Inlet Swivel while trying to turn the Body. If the Swivel is turning with
the Body, then you need to tighten the Inlet Nut tighter on the Inlet Swivel Assembly
Plug.
9. Holding the Body by hand, or lightly in the Bench Vise (with the top surface of the body
protected from damage), remove the Gauge Guard
then remove the Gauges
TIP: Step 9 can be done before Step 8 if desired, but it's usually easier to remove the
Gauge Guard and Gauges with the Inlet Swivel Assembly Plug out of the way.
NOTE ON ESS4 MODELS: The lower Gauge Guard Screw cannot be accessed until
the Relief Valve has been removed (if so equipped). Subsequently, the Gauge Guard
(and Gauges) must be installed into the Body prior to installing the Relief Valve.
10. If necessary, disassemble the Relief Valve as shown in DETAIL A.
CAUTION!
Discard the used Nozzle O-Ring, Inlet Filter, Diaphragm Assembly,
Seat Assembly and Friction Damper. Replace them with new parts each time you
assemble a Regulator.
ESS3/ESS4
[22]
from the Body.
[28,
29].
[16]
from the Body.
[3]
(held on by two screws [5]) and
- 5 -
[8A]
[7]
[4A]
[26]
and Pipe Plug
[25]
SECTION 1
and
[2]
and
(if
[21]
(if
Advertisement
