Actuator Mounting - Fisher 8590 Instruction Manual

8590 Valve
June 2017
Metal Seal Installation
1. With the disk in the closed position, place the seal ring (key 19) onto the disk (key 6). Set the retainer (key 16) onto
the seal, making sure proper alignment between the seal and retainer has been achieved.
2. Place the retainer gasket (key 18) in the groove in the valve body.
3. Attach the seal retainer (key 16) to the valve body and tighten the retainer screws (key 17) just enough to eliminate
the vertical movement of the retainer.
4. Rotate the valve shaft 90_ open/closed 3 times.
5. Tighten the retainer screws per table 7.
6. Be certain the disk is closed before installing the valve according to the Actuator Installation section of this manual.
General Valve Assembly
7. For standard packing, install the packing according to the appropriate instructions presented in step 5 of the
Replacing Packing section of this manual.
For ENVIRO‐SEAL packing, install the new packing system components as described in the ENVIRO‐SEAL Packing
System for Rotary Valves Instruction Manual (D101643X012).
8. Install the anti‐blowout ring (key 23) when used, in the groove in the drive shaft.

Actuator Mounting

With the valve body out of the line, mount the actuator on the valve body in accordance with the instructions in the
actuator instruction manual. Mount the actuator yoke to the valve body, and tighten the actuator‐mounting cap
screws (key 31) to the appropriate torque from table 11.
Table 11. Required Actuator‐Mounting Bolt Torque
VALVE SIZE
NPS
3
4
6
8
10
12
14
16
18
20
24
1. Screws must be lubricated to achieve proper preload.
CAUTION
8590 valve disk rotation is counterclockwise to open (when viewed from the actuator side of the valve body, see figure 10).
Rotating the disk (key 6) past the fully closed position will damage the seal ring (key 18).
Adjusting the Valve Closed Position
Adjust the actuator to bring the disk to the fully closed position at the end of the actuator stroke. To determine the
fully closed disk position, measure the distances between the disk face and the seal retainer face at the top and
bottom of the valve (X1 and X2) as shown in figure 10. Adjust the travel stops or turnbuckle to rotate the disk slightly
until the two measurements are equal, but are allowed to be within 0.25 mm (0.010 inch) of each other. Refer to the
appropriate actuator instruction manual for assistance.
20
SCREW SIZE
Inch
1/2 - 13
5/8 - 11
3/4 - 10
7/8 - 9
1-1/4 - 8
Instruction Manual
SAE J429 GRADE 5/NCF3
NSm
102
190
339
508
1491
D104016X012
(1)
lbfSft.
75
140
250
375
1100