Model 375H - Cameron GENERAL VALVE Twin Seal 400 Series Installation, Operation And Maintenance Manual

GENERAL VALVE
Exploded View
17
19
20
25
15
22
9
18
21
4
Cross Section
5
8
6
11
07/2011 / IOM-GEN-TWIN-03
Twin Seal

MODEL 375H

® ™
Item 375 H Description
5
No. Part No.
1 21-419 Operator Housing
12
14
2 22-417 Upper Stem
8
3 22-418 Lower Stem
4 27-418 Indicator Shaft
6
5 27-419 Indicator Flag
10
6 28-406 Handwheel
7 45-411 Key
24 8 46-425 Bushing
9 48-405 Roller
10 50-402 Grease Retainer
7
11 62-32 O-Ring
2
12 64-415 Protector
13 64-417 Insignia Plate
3
14 65-402 Grease Seal
15 66-409 Ball Bearing
1
16 72-5 Capscrew
16
17 74-6 Screw
23
18 74-9 Set Screw
13
19 75-434 Nut
11
20 76-411 Lube Fitting
21 77-407 Guide Pin
22 77-423 Drive Pin*
23 77-453 Roll Pin
24 78-413 Retaining Ring
25 78-414 Retaining Ring
* not available separately.
375 H is Used on Models:
2" C811
5
17
12
2" C821
4
19
7 3" CA811
25
3" CA821
10
24
15
22
9
1
2
3
18
21
16
E N G I N E E R E D & P R O C E S S V A L V E S
OPERATOR DISASSEMBLY
Req'd
1. Unscrew (17) and remove indicator flag (5).
2. Remove the stem protector (12).
1 3. Remove the handwheel nut (19),
handwheel (6), key (7) and grease
1
retainer ring (10).
4. Remove the retainer ring (25) and pull out
1
the upper stem (2) with lower stem (3),
1
bearing (15), roller (9) and indicator shaft
subassembly (4) out through the top of
1
the housing (1).
1 5. Remove set screw (18) from bottom of
lower stem and push indicator shaft sub-
1
assembly (4) out through the bottom of
the lower stem.
1
6. Separate the stems and remove the
1
retaining ring (24) and the bearing (15)
from the upper stem.
1
7. Remove grease seal (14) and bushing (8)
1 (if required) from top of upper stem (2).
8. Remove O-Ring (11) from inside housing
1
OPERATOR ASSEMBLY
1
1. Install O-Ring (11) in housing (1).
1
2. Place the bearing (15) on the top of the
upper stem (2). Install retaining ring (24).
1
3. Apply a liberal coating of grease to all
4
surfaces of upper stem (2) and inside and
outside of lower stem (3).
1
4. Thread the upper stem and lower stem
1
together such that the drive pin (22) in the
upper stem comes against the shoulder at
1
the TOP of the lower stem (3) and the
1 detent recess in the upper stem is exactly in
line with roller opening in the lower stem.
1
NOTE: This operation may require several
attempts as the threads are multiple start
1
and do not always assemble correctly with
1
the first try.
5. Install the indicator shaft sub-assembly (4)
1
up through both stems. Align the detent
1 hole in the indicator disc with the threaded
hole in the lower stem and fasten with
set screw (18). Set screw must be below the
outside surface of the lower stem.
6. Place the roller (9) in the side opening of
the lower stem. A liberal application of
grease will hold the roller in position.
7. Place the stem assembly into the housing
taking care that roller is aligned with roller
groove in housing. Push the entire
assembly down until the bearing rests on
the shoulder in the housing.
8. Install the retaining ring (25) in the top of
the housing (1).
9. Install grease retainer (10) in handwheel (6)
and place handwheel and key (7) on upper
stem. Install bushing (8) and grease seal
(14) in handwheel nut (19). Screw the nut
on the upper stem and tighten down on
handwheel securely.
10. Install stem protector (12).
11. Install indicator flag (5) and secure
with screw(17).
Installation, Operation and Maintenance Manual
11
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