Graco C Series Instructions And Parts List page 3
Back pressure valve
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Also See for C Series:
- Instructions manual (26 pages) ,
- Instructions - parts manual (24 pages) ,
- Instructions-parts list manual (23 pages)
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6.
Remove the valve seat (1) and the gasket (9) from the
housing (25).
7.
Clean all the parts with a compatible solvent. Check the
parts for wear or damage. Replace worn or damaged
parts.
8.
Assemble the valve seat (1) and the gasket (9) into the
housing (25). Torque to 70–80 in–lb (8–9 N.m).
9.
Assemble the diaphragm and the related parts as shown
in the parts drawing. Torque the cap nut (4) to 27–33
in–lb (3.1–3.7).
Torque to
26
1
115–125 in–lb
27
(13–14 N.m)
Torque to
2
27–33 in–lb
28
1
(3.1–3.7 N.m)
Torque to
3
70–80 in–lb
(8–9 N.m)
15
"AIRSIDE"
4
marking facing
13
down
4
2
10
18
20
21
4
5
16
22
Graco Phone
Number
TO PLACE AN ORDER, contact your Graco distributor, or
call this number to identify the distributor closest to you:
1–800–328–0211 Toll Free
Service
10. Install the spring (13) and the spring plate (15).
11. Screw the cap (28) onto the housing (25). Torque to
115–125 in–lb (13–14 N.m). Reinstall the locknut (27)
and the adjusting screw (26) into the cap (28).
12. Assemble the inlet adapter (22) and the outlet union (11)
into the housing.
13. Assemble the gauge (5) to the pressure tube (16). Use a
thread sealant to ensure a good seal. Install the tube and
the gauge into the inlet adapter (22).
14. Install the valve in the system.
Parts
Ref.
7
No.
Part No.
1n
236893
2n
236894
4
100529
5n
187876
7
101976
9n
189817
10n
154789
11
155665
13
157796
15
160180
16
160745
18n
189816
19n
177430
20n
177432
21n
177431
22
162265
19
25
162811
2
26
112844
1
3
27
100111
9
28
189815
11
n Keep these spare parts on hand to reduce down time.
25
04519
Manual Change
Assembly
Changed
205122
Series to C
Maximum inbound fluid pressure is increased to 300 psi (21
bar, 2.1 MPa).
Description
SEAT, valve
STEM, valve
NUT, hex, cap, 5/16–18
PRESSURE GAUGE, 0–300 psi
(0–21 bar, 0–2.1 MPa) pressure range 1
WRENCH, hex key, 3/8"
GASKET, copper
GASKET, copper
UNION, 3/8 npt(m) x
3/8 npsm(f) swivel
SPRING, compression
PLATE, spring
TUBE, fluid gauge
PLATE, backup
GASKET, valve
DIAPHRAGM PLATE, support
DIAPHRAGM
INLET ADAPTER, 3/8–18 npsm(m),
3/8–18 npt(m), 1/4–18 npt(f)
VALVE HOUSING
ADJUSTING SCREW, 1/2–20 x
1–5/8 inch long
LOCKNUT, 1/2–20
REGULATOR CAP
Summary
Part
Ref
Part No.
Status
No.
Old
1
212030
New
1
236893
Old
5
101180
New
5
187876
Qty.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Name
Seat
Seat
Gauge
Gauge
306640
3
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