Sensus 122 Series, Инструкция по установке и обслуживанию, Страница: 6 / 10

6
Model 122-8 Condensed Parts List 1" and 1¼"
(Continued)
Illustration
Number Description
Part
Number
13 O-ring, Viton, ⅜" x ½"
902418
14 Wave Washer
905479
14a Washer Retainer
121-16-103-50
14b Spacer Washer, Poly-U, Std.
121-16-102-52
15 Molded Valve, Buna-N, Std.
121-10-311-50
16a Retaining Ring, (5100-75H)
904447
16b Valve Holder, Split, Stainless
121-16-130-51
17 Counterspring, See Table, Pages 3–4
17a Spring Guide
121-42-018-00
19 Orifice, 1¼" dia., brass, Std.
143-16-023-03
20 Orifice, 1¼" dia., brass, Std.
121-10-023-50
21a Vent Valve Assy
143-16-526-01
26 Gasket
121-41-063-00
32 Tetreaseal (or O-ring), 2⅜" x 2½"
904081
41 Bushing
121-41-091-00
42 O-ring, ¼" x ⅜", Buna-N
934005
43 Control Tube
121-41-015-01
45
Travel Indicator
Repair Kit — consisting of Main and Seal
Diaphragms, Seal Washers, Molded Valve
with Wave Washer and Retaining Ring,
Tetraseals and Gaskets: All internal
control models except Back Pressure or
Relief (Std.)
Back Pressure or Relief with internal
control (Std.)
All external control models (Std.)
091-00-365-63
121-41-598-00
121-41-598-02
121-598-01
Model 122 Regulators Installation and Maintenance Instructions
1½", 2" and 2½" Model 122-12
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 No.1190646.
3. Remove both halves of valve holder 16b and remove valve 15 .
4. Reassemble.
To Service Main Diaphragm (11d)
1. Remove top cap 1 , adjustment 3 or 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 12d or 12t from turning while firmly tightening
nut 11a . Excessive turning of stem could strain or damage
seal diaphragm 12b . Emery surface of grip washers 11f
should face against both sides of diaphragm 11d .
7. Make rim bolts 22 finger-tight. Next, insert spring 9 and
compress it slightly with adjustments 3 or 6 , just enough to
force diaphragm assembly 11 fully downwards. Then tighten
screws 22 carefully and evenly, alternately tightening opposite
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)
1. Remove bolts 38 and bottom plate 37 .
2. Remove valve 15 per section “To Service Valve (15)”. (Does
not apply to back Pressure Regulators and Relief Valves.)
3. Remove main diaphragm 11d per section “To Service Main
Diaphragm ( 11d )”, remove bolts 25 and lower case 24 , and
remove assembly 12 and bushing 27 .
4. Remove retaining ring 19a . Use Truarc 0600 pliers, Sensus
Part Number 1190648.
5. Remove orifice 19 .
6. On assembly be sure retaining ring 19a is fully seated in the
groove all the way around the orifice.
Also, note the bevel on the inside edge of 19a . The bevel
must face toward the knife-edge of the orifice.