DeZurik ANSI/AWWA C540 Manual de instruções - Página 5
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Disassembly
(continued)
1. Shut off the air supply to the cylinder.
2. Relieve pressure in the cylinder.
3. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power
to prevent accidental operation of the actuator.
4. Disconnect the cylinder tubing.
5. Remove nuts and washers from the tie rods, and remove cylinder cap.
6. Rotate the cylinder tube while pulling it from the piston.
7. Remove the nut on the piston rod.
8. Remove the piston.
9. Remove extension cap from other end of gear box housing.
10. Remove nuts and spring washers from the rack rod.
11. Pull the piston rod, complete with rack rod, from the cylinder head.
12. Take out the four screws and separate the cylinder head from the actuator housing.
13. Remove the seal in the cylinder head.
Reassembly
1. Install the piston rod sealing ring and Teflon backing rings as shown in Figure 1.
a. Clean the groove in the cylinder head and lubricate all the parts.
b. Insert the seal ring in the groove. Make sure the seal ring lies flat in the groove.
c. Insert the Teflon backing rings. The backing rings are cut with a bevel. Be sure the ends
match and do not overlap.
March 2017
Figure 1—Piston Rod Seal Placement
Page 5
DeZURIK
D10295