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

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6.6 Change the diaphragm type
1. Remove the bonnet nuts and lift off the bonnet.
2. Remove the plastic cap and travel stop nut.
3. Loosen the handwheel setscrew(s) and remove the handwheel from the bonnet.
4. Remove the diaphragm, spindle and bushing assembly by withdrawing it through bottom of bonnet.
5. Remove the compressor.
If the compressor to spindle connection is a ... Then ...
Spring pin Drive out the spring pin that retains the compressor
"T" slot Slide the compressor off the spindle
6. Change to the new compressor.
If you are changing ... Then ...
From an elastomer to a PTFE diaphragm Install a tube nut into the hexagonal hole in the new com-
pressor
From a PTFE to an elastomer diaphragm Change to the new compressor.
7. Install the new compressor.
If the compressor to spindle connec-
tion is a ... Then ...
Spring pin Locate the new compressor on the spindle and drive in the
spring pin
“T” slot Slide the new compressor onto the spindle
6.7 Replace the o-rings
1. Disassemble the topworks:
a) Remove the bonnet nuts and lift off the bonnet.
b) Remove the plastic cap and travel stop nut.
c) Loosen the handwheel setscrews and remove the handwheel from the bonnet.
d) Remove the diaphragm, spindle, and bushing assembly by withdrawing it through the bottom of
the bonnet.
2. Remove o-ring 1 from the groove in the bushing outside diameter.
2
3
1
Figure 5: O-rings for 0.50–2.00
inch (DN 15–50) valve
1. O-ring 1
2. O-ring 2
3. O-ring 3
2
3
4
1
Figure 6: O-rings for 2.50–4.00 inch
(DN 65–100) valve
1. O-ring 1
2. O-ring 2
3. O-ring 3
4. O-ring 4
6.6 Change the diaphragm type
16 Handwheel Operated Valves (903, 913, 963) Installation, Operation, and Maintenance Manual