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SR1 & SR2 Regulators 83-951-000

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

To rque:

3.5 to 5.1

Nm (35 to 45 in.lb.)

Bottom Plug

To rque:

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)

To rque: 4.5 to 5.6 Nm

(60 to 70 in.lb.)

Spring Cage (Bonnet)

To rque: 13.6 to 15.8 Nm

(120 to 140 in.lb.)

T-Handle

(Adjusting Screw

Assembly)

O-Ring,

Vent Seal

Bottom Plug

To rque:

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)

To rque: 13.6 to 15.8 Nm

(120 to 140 in.lb.)

Adjusting Screw

Control Spring

Spring, Bottom

O-Ring,

Bottom Plug

To rque:

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)

To rque: 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

1 2

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