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Operation

307107P

5

Parts

Model 208997, Series E 

(Includes items marked with

 

+)

Model 903508, Series A 

(Includes items marked with

 

*)

13

19

1

7

5

20

16

22

12

18

17

11

8

15

10

14

3

7

1

6

6

4

5

5

7

3

2

8718A

See TOP VIEW

Apply anaerobic pipe 
sealant to threads

Torque to 10–12 ft-lb 
(13.5–16 N-m)

Apply lithium-base 
grease

PTFE side down

Lubricate threads

Torque to 15–20 ft-lb
(21–27 N-m)

Ref.
No.

Part No. Description

Qty.

1+*

101682

SCREW, soc hd cap; 1/4–20 x 5/8

6

3+*

111697

PLUG, sq hd pipe; 1/4 npt

1

5+*

104144

SPRING, compression

1

7+*

160033

PLATE, spring

1

8+

187873

GAUGE, 0 to 200 psi (0 to 1.4 MPa, 0 to 
14 bar)

1

8*

208855

GAUGE, fluid pressure dampener

1

10+*

188006

SEAT, stainless steel

1

11+*

188512

RETAINER, diaphragm,
stainless steel

1

12+*

172193

DIAPHRAGM

1

13+*

186872

SCREW, adjusting

1

14+*

171117

GASKET, acetal copolymer

1

15+*

187878

HOUSING

1

16+*

164864

PLATE, diaphragm

1

17+*

171912

GASKET, cellulose fibre

1

18+*

171913

GASKET, cellulose fibre

1

19+*

209027

CAP

1

20+*

160791

NUT, diaphragm

1

22+*

157277

O-RING, Thiokol

®

1

27*

501918

FITTING, bushing, pipe (loose)

1

28*

156971

FITTING, nipple, short (loose)

1

NOTE: Keep items 8, 10, 12, 14, 17, and 18 on hand to reduce 
down time.

1

5

2

6

3

7

4

6

4

2

5

3

1

ti24721a

TOP VIEW

Torque screws (1) to 120–130 in-lb 

(13.6–14.7 N-m) in order shown

Summary of Contents for E 208997

Page 1: ...997 Series E Stainless Steel Back Pressure Valve Model 903508 Series A Stainless Steel Back Pressure Valve with a Fluid Dampener Pressure Gauge 300 psi 2 1 MPa 21 bar Maximum Inlet Pressure 200 psi 1...

Page 2: ...The maximum inlet pressure of this equipment is 300 psi 2 1 MPa 21 bar Follow the Pressure Relief Procedure on page 4 if the spray tip clogs and before cleaning checking or servicing the equipment Do...

Page 3: ...irculating pressures in the system Operation NOTE The back pressure valve controls pressure ahead of its intake Turn the adjusting screw clockwise to increase pressure and counterclockwise to decrease...

Page 4: ...16 N m 9 Carefully inspect the seat 10 for damage wear or dirt These things could cause the regulated pres sure to creep Replace the seat if necessary 10 Replace the seat gasket 14 when replacing the...

Page 5: ...033 PLATE spring 1 8 187873 GAUGE 0 to 200 psi 0 to 1 4 MPa 0 to 14 bar 1 8 208855 GAUGE fluid pressure dampener 1 10 188006 SEAT stainless steel 1 11 188512 RETAINER diaphragm stainless steel 1 12 17...

Page 6: ...Operation 6 307107P Dimensions 7 25 in 184 mm 4 in 102 mm diameter 1 1 4 npt f in let and outlet 8717A...

Page 7: ...psi 0 035 1 4 MPa 0 35 14 bar Inlet and Outlet size 1 1 4 in npt f Gauge port size 1 4 in npt f Wetted parts 304 316 stainless steel celcon Diaphragm nylon fabric base with impregnated buna N and mate...

Page 8: ...n material or workmanship repairs will be made at a reasonable charge which charges may include the costs of parts labor and transportation THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRA...

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