Flowserve QX Limitorque - Manual (Page 19)

19
Limitorque QX Electronic Actuator FCD LMENIM3314-00 – 5/11
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NOTE: Two procedure options are available for removing the actuator and the thrust base:
1. Remove actuator from the thrust base, leaving the base mounted to the mounting flange or removing the thrust
base separately
2. Remove actuator and thrust base as a unit from the mounting flange.
3.2.4 Removal (Type A1/A1E Base) Actuator Removal Separate from Thrust Base
STEP 1
c WARNING: Hazardous Voltage! Turn off all power sources to actuator before removing actuator from mounting
plate. Power sources may include main power or control power. If necessary, disconnect incoming power leads
L1, L2, L3, and control wiring from the terminal block.
Remove the bolts (#10-10) that secure the actuator to the thrust base assembly (#10).
STEP 2
c WARNING: Potential high-pressure vessel! Before disassembling your actuator, ensure that the valve or other
actuated device is isolated and is not under pressure.
Lift actuator from thrust base assembly (#10).
STEP 3
c WARNING: Potential for actuated device to change position! The thrust base will maintain position only if non-
backdriving thread lead is used. Ensure proper thread lead is used in your application before allowing thrust
base to be used for main- taining position when actuator is removed.
Thrust base removal (if required)
The valve position will be maintained if a locking thread lead is used on the valve stem. If thrust base removal is
required, use the following removal procedure.
Remove the bolts that secure the thrust base to the mounting adapter.
STEP 4
Rotate the thrust base (#10) until it feeds off the threaded stem.
3.2.5 Remounting (Type A1/A1E Base) Actuator Remounting Separate from Thrust Base
STEP 5
Thrust base remounting (if required)
Ensure the thrust base stem nut has the two lugs positioned upward to engage with the drive sleeve slots when
actuator is reinstalled onto thrust base. Thread thrust base back onto mounting adapter.
STEP 6
Secure thrust base to mounting adapter with mounting bolts.
STEP 7
Actuator remounting
Lower the actuator onto the thrust base, making sure thrust nut lugs align and properly engage with drive sleeve slots.
STEP 8
Install bolts (#10-10) to secure the actuator to the thrust base assembly (#10).