AirSep AS-Q, Instruction Manual, Page: 133 / 198

AS-Q—AS-Z Series Instruction Manual 133
AirSep Corporation
4.2 Actuated Valve
It is generally most convenient to detach the actuator
and its auxiliary devices before removing the valve from
the pipeline. If the valve package is small or if it is difficult
to access, it may be more practical to remove the entire
assembly.
NOTE: To ensure proper reassembly, observe the position
of the actuator and positioner/limit switch with respect to
the valve before detaching the actuator.
WARNING:
ALWAYS DISCONNECT THE ACTUATOR FROM ITS POWER SOURCE,
PNEUMATIC, HYDRAULIC OR ELECTRICAL, BEFORE ATTEMPTING TO
REMOVE IT FROM THE VALVE!
WARNING:
DO NOT REMOVE A SPRING-RETURN ACTUATOR UNLESS A
STOP-SCREW IS CARRYING THE SPRING FORCE!
1. Detach the air supply, electrical supply, hydraulic
supply and control signal cables or pipes from their
connectors.
2. Loosen screws of no-play coupling.
3. Unscrew the actuator mounting bracket screws.
4. Lift the actuator straight up in line with the valve stem
until the coupling between actuator drive and valve
stem is completely disengaged.
5. Place actuator in a safe location to avoid damage or
personal injury.
4.3 Valve Removal
1. Read all WARNINGS!
2. Valve must be fully closed before removing it from the
pipeline.
3. CAUTION: Valves equipped with spring-to-open
(air-to-close) actuators must be disconnected from the
actuators and then closed. Valves must be closed while
removing them from the pipeline.
Removing Insert
Placing Spring Into Groove
Tapping End Of Spring Into Body
Installing Seat And Insert Assembly Into Body.
Angled As To Engage Insert Spring
Tapping Insert Assembly Into Body
Insert Removal / Installation
Figure 8
IMO 1/18
IMO-308 EN 7