Fisher EZL Instruction Manual page 10

Type EZL
Indicator Fitting
Body Size (key 56) or
Plug (key 38)
2 inch / DN 50 10 to 15 / 15 to 20
3 and 4 inch /
10 to 15 / 15 to 20
DN 80 and 100
1. Socket head cap screw (keys 16 and 33) torque specifications are given in inch-pounds.
2. Apply torque to each screw in star pattern, 5 complete rounds.
On the 4 inch / DN 100 size remove the
7b.
intermediate flange (key 25), seat ring (key 2), and
O-ring (key 75) (see Figure 7, Detail A.2). The seat
ring (key 2) can be moved out of the way and the
O-ring (key 75) can be removed without removing
the intermediate flange (key 25). Inspect the O-ring
for damage or wear, replace if necessary.
If also inspecting the intermediate
flange O-ring, go to step 4 in the
Intermediate Flange O-ring Maintenance
section below.
8a. For the 2 and 3 inch / DN 50 and 80 sizes reinstall
the spring washer (key 72) with the inside edge
pointing up. Lightly lubricate O-ring (key 34)
before placing on top of the spring washer (key 72)
in the body (key 1).
8b. For the 4 inch / DN 100 size lightly lubricate the
O-ring (key 75) and place it in the body (key 1).
9. Set the seat ring (key 2) back in the body (key 1)
with the curved side down and the seat edge up.
10. Place the disk holder assembly (key 30) and disk
retainer (key 31) on the sleeve adaptor (key 27).
11. Insert the spring lock washers (key 32) and hex
socket cap screws (key 33) and tighten. See
Torque Specification table for proper torque.
12. Lubricate surface between lower casing and
intermediate flange. Carefully lift the upper
actuator casing and lower actuator casing
assembly (keys 11 and 5) and place on the body
(key 1). Secure with stud nuts (key 26). See
Torque Specification table for proper torque.
10
Table 3. Torque Specifications
TORQUE SPECIFICATIONS, FOOT-POUNDS / N•m
Stud Nuts
(key 26) Screws (key 16)
45 to 50 / 60 to 70
80 to 95 / 110 to 130 90 to 100 / 120 to 135
Note
Socket Head Cap Cap Screws
(keys 21 and 39)
(1)(2)
55 to 60 / 75 to 80 35 to 45 / 50 to 60
31 to 34 / 42 to 46
Intermediate Flange O-ring Maintenance
1. Make a mark on the lower actuator casing
(key 5), intermediate flange (key 25), and body
(key 1) to indicate proper alignment.
2. Remove stud nuts (key 26).
3. Carefully lift the upper actuator casing and lower
actuator casing assembly (keys 11 and 5) off the
body (key 1).
4. Remove cap screws (key 6).
5. Lift off intermediate flange (key 25).
6. Remove O-ring (key 7). Inspect the O-ring for
damage or wear, and replace if necessary. Lightly
lubricate O-ring before placing in the body (key 1).
If performing Seat Maintenance in
conjunction with Intermediate Flange
O-ring, return to step 7 of the Intermediate
Flange O-ring Maintenance section.
7. Replace the intermediate flange (key 25), make
sure to position the stud bolt (key 24) holes on
the outsides of the body (key 1). Secure with cap
screws (key 6). See Torque Specification table for
proper torque.
8. Lubricate the surface between the lower casing
and the intermediate flange. Reinstall actuator
assembly to body.
Cap Screws Socket Head Cap
(key 6) Screws (key 33)
50 to 60 / 70 to 80 55 to 60 / 75 to 80
70 to 95 / 95 to 130 80 to 90 / 110 to 120
Note
(1)