Quarter Turn Gearbox Stop Setting Procedure - Emerson 2000LP Series Installation, Operation And Maintenance Manual

Section 6: Assembly to Valve
April 2013
6.5

Quarter Turn Gearbox Stop Setting Procedure

Built-in mechanical stops are provided in the gearbox to prevent operation beyond total valve
travel of 90° (± 6°).
End of travel stops are independently adjusted, locked in place and sealed.
Figure 2
46
Loosen both LOCKNUTS (46) and back out two STOPBOLTS (86 & 87) to allow valve to close and
open fully. Ensure Travel Limit Valves have been properly adjusted (see appropriate section of
this manual), and then proceed as follows:
1.
2.
3.
4.
CAUTION:
Do not set Actuator Travel Limit valves to drive into mechanical stops. Damage can occur if
actuator is allowed to repeatedly stall into end stops.
10
86
Run actuator pneumatically to full closed position.
Screw CLOSE STOPBOLT (86) in until it seats, then back off 1/2 TURN. Install WASHER
(48) and tighten LOCKNUT (46).
Run actuator pneumatically to full open position.
Screw OPEN STOPBOLT (87) in until it seats, then back off 1/2 TURN. Install WASHER
(48) and tighten LOCKNUT (46).
Installation, Operation and Maintenance Manual
87
48
Part Number: E7K-400-0913
Assembly to Valve