Wilkerson SR2 - Manual (Page 2)

SR1 & SR2 Regulators 83-951-000
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to desired secondary pressure can be made only with primary
pressure applied to the regulator.
3. To decrease regulator pressure setting, always reset from a
pressure lower than the final setting desired. For example,
lowering the secondary pressure from 550 to 410 kPa (80 to
60 PSIG) is best accomplished by dropping the secondary
pressure to 350 kPa (50 PSIG), then adjusting upward to
410 kPa (60 PSIG).
Service
CAUTION: SHUT OFF AIR SUPPLY and exhaust the
primary and secondary pressure before disassembling
regulator unit. (Turning the knob counterclockwise reduces
regulator’s setting, but does not vent downstream pressure
on non-relieving regulators.)
CAUTION: Lubricate parts with a mineral based grease /
oil or silicone grease. DO NOT use synthetic grease / oils
such as esters.
A. Servicing the Bonnet and Diaphragm Assembly-
1A. On SR1, disengage the adjusting knob by pulling upward. Turn
adjusting knob counterclockwise until the compression is released
from the pressure control spring.
1B. On SR2, push down on the adjusting knob while turning knob
counterclockwise until the compression is released from the
pressure control spring. (Knob is locked when up.)
SR1 Regulator
Plastic Knob
(Non-Relieving Shown)
SR2 Regulator - Knob
(Relieving Shown)
Figure 1
Lightly grease with provided lubricant.
Inspect for nicks, scratches, and surface imperfections.
If present, reduced service life is probable and future
replacement should be planned.
Clean with lint-free cloth.
Knob
Adjusting Screw Assembly
Control Spring
Spring, Bottom
O-Ring,
Bottom Plug
O-Ring,
Vent Seal
Bottom Plug
Torque:
3.5 to 5.1
Nm (35 to 45 in.lb.)
Bottom Plug
Torque:
3.5 to 5.1 Nm
(35 to 45 in.lb.)
Inner Valve (Poppet)
Assembly
Body
Knob
Adjusting Screw Assembly
Control Spring
Spring, Bottom
O-Ring,
Bottom Plug
Diaphragm Assembly
(Includes Upper
Diaphragm Plate
& Lower Diaphragm
Button)
Diaphragm Assembly
(Includes Upper
Diaphragm Plate
& Lower Diaphragm
Button)
Inner Valve (Poppet)
Assembly
Body
Spring Cage (Bonnet)
Torque: 4.5 to 5.6 Nm
(60 to 70 in.lb.)
Spring Cage (Bonnet)
Torque: 13.6 to 15.8 Nm
(120 to 140 in.lb.)
T-Handle
(Adjusting Screw
Assembly)
O-Ring,
Vent Seal
Bottom Plug
Torque:
3.5 to 5.1 Nm
(35 to 45 in.lb.)
Control Spring
Spring, Bottom
O-Ring,
Bottom Plug
Diaphragm Assembly
(Includes Upper
Diaphragm Plate
& Lower Diaphragm
Button)
Inner Valve (Poppet)
Assembly
Body
Spring Cage (Bonnet)
Torque: 13.6 to 15.8 Nm
(120 to 140 in.lb.)
Adjusting Screw
Control Spring
Spring, Bottom
O-Ring,
Bottom Plug
Bottom Plug
Torque:
3.5 to 5.1
Nm (35 to 45 in.lb.)
Inner Valve (Poppet)
Assembly
Body
Diaphragm Assembly
(Includes Upper
Diaphragm Plate
& Lower Diaphragm
Button)
Spring Cage (Bonnet)
Torque: 4.5 to 5.6 Nm
(60 to 70 in.lb.)
SR2 Regulator - T-Handle
(Relieving Shown)
Description
SR1
Plastic Knob (1/4")
SR1
Adjusting Screw (1/4")
SR2
Knob (1/2")
SR2
T-Handle (1/2")
Spring Cage Assembly SRP-96-017 CKR354YSS SRP-96-018 CKR11YSS
Gauges SRP-96-021 SRP-96-021 SRP-96-022 SRP-96-022
Panel Mount Nut SRP-96-019 SRP-96-019 SRP-96-020 SRP-96-020
Regulator Repair Kit (Relieving) SRP-96-013 SRP-96-013 SRP-96-011 SRP-96-011
Regulator Repair Kit (Relieving) Low Temp. — — SRP-96-011 SRP-96-011
Regulator Repair Kit (Non-Relieving) SRP-96-014 SRP-96-014 SRP-96-012 SRP-96-012
Regulator Repair Kit (Non-Relieving) Low Temp. — — SRP-96-012 SRP-96-012
Spring, 0-25 PSIG SPR-375-2-SS SPR-375-2-SS — —
Spring, 0-60 PSIG SPR-376-1-SS SPR-376-1-SS SPR-388-1-SS SPR-388-1-SS
Spring, 0-125 PSIG SPR-377-1-SS SPR-377-1-SS SPR-389-1-SS SPR-389-1-SS
Spring, 0-250 PSIG — — SPR-390-1-SS SPR-390-1-SS
SR1 Regulator
Stainless Steel Knob
(Non-Relieving Shown)
2. Unscrew the threaded bonnet assembly. Next, disassemble,
clean, and carefully inspect parts for wear and/or damage.
If replacement is necessary, use parts from service kits.
3. Install diaphragm assembly into body. Then install bonnet assembly
to body. See Figure 1 for torque value.
B. Servicing the Poppet Assembly-
1. Exhaust system air pressure as previously described. Then remove
bottom cap by unscrewing it from body. Next, remove cap and
o-ring, spring and poppet assembly.
2. Next, clean, and carefully inspect parts for wear and/or damage. If
replacement is necessary, use parts from service kits.
3. Lubricate o-ring and sliding surfaces using grease supplied with
service kit.
4. Lubricate cap’s o-ring and install it in o-ring groove on cap. Then
screw cap into body until the cap bottoms out in body. See Figure
1 for torque value.
5. Turn on air supply and adjust to desired secondary pressure as
described in the Operation section.
Turn on air pressure and check regulator for leakage. If leakage occurs,
DO NOT OPERATE — conduct repairs again.
If you have questions concerning how to service this unit, contact your
local authorized daler or your customer service representative.
Service Kits Available