ITT Engineered Valves 903, Инструкция по установке, эксплуатации и обслуживанию

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3. Unscrew the diaphragm and spindle assembly from the handwheel bushing.
4. Remove o-rings:
Valve size (in) Valve size (DN) Action
.5–2 15–50 Remove o-ring 2 from the
groove in spindle outside diame-
ter.
2.5–6 80–150 Remove o-rings 2 and 4 from
the spindle plug.
5. Install the thrust bearing or washer:
a) Lubricate the thrust bearing or washer.
For more information, see
6.3 Lubrication requirements on page 13 .
b) Install the thrust bearing or washer on the shoulder of the bushing.
6. Cover the stem threads with masking tape to protect the o-rings during installation.
7. Lubricate o-rings.
For more information, see
6.3 Lubrication requirements on page 13 .
Valve size (in) Valve size (DN) Action
.5–2 15–50 Lubricate o-rings 1 and 2 and
insert them into the grooves in
the bushing and spindle.
2.5–6 80–150 Lubricate o-rings 2 and 4 and
insert them into the grooves in
the spindle plug.
Select the proper o-rings for the valve size.
Valve size, inches
(DN) O-ring 1 O-ring 2 O-ring 4
0.50 (15) .445 x .063 #107 –
0.75 (20) .571 x .063 #109 –
1.00 (25) .634 x .063 #110 –
1.25 (32) #119 #112 –
1.50 (40) #119 #112 –
2.00 (50) #119 #112 –
2.50 (65) #218 #209 #212
3.00 (80) #218 #209 #212
4.00 (100) #220 #210 #214
8. Remove the masking tape from the stem threads.
9. Screw the diaphragm and spindle assembly into the bushing.
10. Install the diaphragm, spindle, and bushing assembly into the bonnet.
Verify that the shim washer is installed.
11. Install the handwheel:
a) Tighten the setscrews, ensuring the setscrew ends engage the bushing holes.
b) If you do not have a plastic handwheel, then use a thread locking compound.
12. Install o-ring 3 and screw the cap onto the bushing hand tight.
6.7 Replace the o-rings
Handwheel Operated Valves (903, 913, 963) Installation, Operation, and Maintenance Manual 17