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Types EZH and EZHSO
8. Remove screws (key 24). Lift off the lower actuator
casing (key 5).
For EZH Series: Remove screws (key 33) and spring
lock washers (key 32). Lift off the disk holder assembly
(key 30) and disk retainer (key 31).
For EZHSO Series: Remove the hex socket cap screw
(key 154). Lift off the disk holder assembly (key 30).
9. Slide the sleeve (key 14) out of the lower actuator
casing (key 5) and slide the outlet plate (key 19) off the
sleeve. Check the sleeve for scratches, burrs or other
damage and replace if necessary.
10. Remove the sleeve adaptor (key 27) from the sleeve
(key 14). Take care not to damage the sleeve while
removing the sleeve adaptor. Check the O-ring (key 28)
for damage and replace if necessary.
11. Place the sleeve adaptor on the sleeve and tighten.
12. Inspect the lower actuator casing (key 5), O-ring
(key 9), anti-friction split rings (key 8) and anti-friction
ring (key 4) for damage or wear. If damaged, remove
the O-ring and split rings; replace with new parts.
Lightly lubricate the O-ring and split rings. Place
the split rings in the body first, then slide the O-ring
between the split rings.
13. Slide the outlet plate (key 19) onto the sleeve (key 14)
and slide the sleeve into the lower actuator casing
(key 5).
For EZH Series: Place the disk holder (key 30) and
disk retainer (key 31) on the sleeve adaptor (key 27).
Insert the spring lock washers (key 32) and screws (key
33) and tighten.
For EZHSO Series: Place the disk holder assembly
(key 30) on the sleeve adaptor (key 27). Insert the hex
socket cap screw (key 154) and tighten.
See Torque Specification table for proper torque.
14. Lightly lubricate the O-rings (keys 15 and 17) and the
inner and outer diaphragm (key 20) edges. Place the
inlet plate (key 18) and the diaphragm (key 20) on the
sleeve (key 14). Make sure O-rings (key 15 and 17) are
correctly positioned. Insert and tighten the hex socket
cap screws (key 16). See Torque Specification table for
proper torque.
22
When tightening fasteners arranged in a
circular pattern, alternate the tightening
of each fastener with the fastener directly
across from it using a "star" criss-cross
pattern for five times, until proper specified
torque is achieved. Each time around, when
all screws are tightened to the required
torque, the diaphragm will compress a little
until the plates are in direct, metal-to-metal,
contact. It will take at least five times around
before this happens. Only then will the
applied torque on each screw remain at the
required value.
15. Carefully lift the lower actuator casing assembly (key 5)
and place on the body (key 1). Take care to match up
the alignment marks. Secure with screws (key 24).
See Torque Specification table for proper torque.
16. For EZH Series: Lightly lubricate the spring (key 13)
and place on the inlet plate (key 18).
17. Carefully place the upper actuator casing (key 11) on
the lower actuator casing (key 5). Take care to match
up the alignment marks. Insert the two threaded stems
180° apart and away from flanges.
Place the washers and hex nuts (keys 22 and 23) and
brackets on the long cap screws and evenly tighten.
Install remaining small cap screws (key 21), washers
and hex nuts. Replace the two threaded stems by two
bolts (keys 21, 22 and 23). See Torque Specification
table for proper torque.
18. For EZHSO Series: Tighten hex nuts (key 151) and
install protective cap (key 146).
19. Place the travel indicator assembly (keys, 138, 139,
140, 141, 142, 143, 144, 145 and 192) in the upper
actuator casing (key 11) by hitting the tip of the stem
(key 139) to clip the fitting (key 144) into the plate (key
18) and tighten the travel indicator fitting (key 141).
Note
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