GIM1329-020
GIM1329-025
GIM1329-030
4
Model 122 Regulators Installation and Maintenance Instructions
1" and 1
¼
" Model 122-8
GIM1329-020
(Internal Control)
STANDARD REGULATOR/ATMOSPHERIC REGULATOR/
ZERO REGULATOR
GIM1329-030
COUNTERSPRING 17 for Atmospheric Regulators and
Zero Governors, also used on Standard Regulators
GIM1329-025
(External Control)
STANDARD REGULATOR/DIFFERENTIAL REGULATOR
ATMOSPHERIC REGULATOR/ZERO REGULATOR
READ “
General Servicing Instructions
” PAGE 2
To Service Main Diaphragm (11d)
1.
Remove top cap
1
, adjustment
3
and
6
and spring
9
.
Mark or measure position of adjustment at start. Use this to
return adjustment to original setting during reassembly.
2.
Remove bolts
22
and upper case
21
.
3.
On standard Regulators and Differential Regulators, remove
bolts
38
and bottom plate
37
. Hold valve
15
in upward
position for remaining work.
4.
Use a screwdriver in slot in top end of stem
12d
or
12t
to
prevent stem from turning and loosen and remove nut
11a
.
5.
Disassemble diaphragm assembly
11
.
6.
When reassembling, use screwdriver per step 4 above to
prevent stem
12b
or
12t
from turning while firmly tightening
nut
11a
. Excessive turning of stem could strain or damage
seal diaphragm
12b
.
7.
Rim bolts
22
should be first made finger tight. Next, insert
spring
9
and compress it slightly with adjustment
3
or
6
, just
enough to force diaphragm assembly
11
fully downwards.
Then tighten screws a little at a time until all are firm and
secure. There must be no leakage around the rim, but
diaphragm
11d
must not be crushed, twisted or pinched.
To Service Orifice (19 or 20)
1.
Remove bolts
38
and bottom cap
37
.
2.
For orifice
19
, remove retaining ring
16a
(use Truarc 0200
pliers, Sensus Part No. 1190646), remove split valve holder
1
6b
and remove valve
15
.
3.
For orifice
20
, remove top cap
1
and adjustment
3
, and
remove spring
9
. Mark or measure the position of adjustment
3
beforehand and return it to the same place at reassembly.
4.
Unscrew orifice
19
or
20
using 1
⅝
" hex socket wrench.
When replacing orifice, use a moderate amount of pipe joint
compound on orifice threads.
To Service Valve (15)
1.
Remove bolts
38
and bottom plate
37
.
On Back Pressure Regulators and Relief Valves, remove
diaphragm assembly per section “To Service Main Diaphragm
(
11d
)”, remove bolts
25
and lower case
24
, and remove
assemblies
11
and
12
intact and bushing
27
.
2.
Remove retaining ring
16a
. Use Truarc 0200 pliers, Sensus
Part Number 1190646.
3.
Remove both halves of valve holder 1
6b
and remove valve
15
.
4.
Reassemble.
1
2
3
9
21a
11
a
c
f
b
d
24a
25
42
41
43
19 13
17a
27
16b
17
45
21
22
23
12
e
e
b
a
c
d
24
32
35
38
37
16a
14
15
Standard
Regulator Only;
see Fig. 1 for
others
1
2
3
9
21a
11
a
c
f
b
d
25
19 13
27
16b
45
21
22
23
12
e
e
b
a
c
d
24
32
35
38
37
16a
14
15
Standard
Regulator Only;
see Fig. 1 for
others
Fig.1
ADJUSTMENT 6
and VENT CONNECTION
21b for Differential Regulators,
Atmospheric Regulators
and Zero Governors
1
2
6
9
21b
19
13 16b
32
38
37
16a
14
15
17a
17
