Flowserve 035 000 Series - Manual (Page 5)

5
Flow Control Division
Kammer Control Valves
6 REMOVE AND INSTALL ACTUATOR
General Information
We recommend separating the actuator from the
valve during all repair work. However, many maint-
enance and adjusting operations can be carried out
in an installed condition.
6.1 Remove series 4 actuator
(see Fig 1 + 2)
For series 2 actuator see 3.3
6.1.1 Shut off air supply.
DANGER: Depressurise the line to atmospheric
pressure and drain all fluids from the valve before
working on the actuator. Failure to do so can cause
serious injury.
6.1.2 As required remove any outside tubing.
For actuators with spring-to-close, go to 3.1.1
For actuators with spring-to-open, go to 3.1.2
6.1.3 Remove cap and nameplate. Tighten zero adjusting
nut until it just touches the surface of the spring hous-
ing. This relieves the plug from actuator spring pres-
sure. If the actuator is fitted with a handwheel this
can be used to relieve the plug from actuator spring
pressure.
6.1.4 Using a wrench, secure the actuator stem against turn-
ing and using a second wrench loosen the stem lock-
nuts. If the actuator is fitted with a coupling refer to
the procedure described in the maintenance instruc-
tions for the I/P actuator.
NOTE: T he actuator stem must not be rotated, as this
will cause damage to the diaphragm.
6.1.5 Loosen gland and clamp nuts.
6.1.6 Secure plug stem against turning and unscrew actua-
tor from plug stem by rotating counter-clockwise.
NOTE:
Ensure that the plug assembly is not rotated
with the plug seated. This may cause irreparable dam-
age to the seating faces.
6.1.7 Remove actuator and remove at the same time lock-
nut, travel indicator disc, gland nut and clamp nut.
6.2 Install series 4 actuator
Information:
•
Before the actuator is installed, it must be cali-
brated according to section 8 of the instructions
„Pneumatic and Electro-pneumatic Actuators“.
•
All worn or damaged parts must be replaced.
Reusable parts must be clean.
6.2.1 Position actuator with clamp nut, gland nut, locknuts
and travel indicator disc on the valve.
6.2.2.1 Only for „spring-to-close“ actuators:
Screw actuator onto plug stem by rotating clockwise,
until the yoke plate just touches the valve housing and
the actuator is aligned forward. If the actuator is fit-
ted with a coupling refer to the procedure described
in the maintenance instructions for the I/P actuator.
NOTE: Ensure that the plug assembly is not rotated
with the plug seated. This may cause irreparable dam-
age to the seating faces.
6.2.2.2 Only for „spring-to-open“ actuators:
Lift plug stem and screw it into the lower coupling
half until the distance between „plug in seat“ and
„plug raised“ approximately corresponds to the speci-
fied stroke.
6.2.3 Tighten clamp nut and gland nut.
6.2.4 Adjust seat tightness by screwing/unscrewing the
plug stem in/out of the actuator stem.
NOTE: Ensure that the plug assembly is not rotated
with the plug seated. This may cause irreparable dam-
age to the seating faces. Open valve, make adjust-
ment, close valve and check for leaks. If the valve is
fitted with a bellows seal the plug stem may NOT be
rotated at all. In the case of a bellows seal adjust-
ments are made with the coupling.
6.2.5 After adjusting, secure the locknuts and the travel
indicator disc lying between them against actuator
stem and align the travel indicator on the yoke rod.
6.3 Remove series 2 actuator
(see Fig. 1a)
For series 4 actuator see 3.1
6.3.1 Shut off air supply.
DANGER: Depressurise the line to atmospheric
pressure and drain all fluids from the valve before
working on the actuator. Failure to do so can cause
serious injury.
6.3.2 Disconnect all tubing.
6.3.3 Remove 2 screws and remove coupling.
6.3.4 Remove yoke rod retaining nuts and lift actuator
assembly from the valve.
6.3.5 Remove coupling insert and it’s locknut from plug
stem.
NOTE: Ensure that the plug assembly is not rotated
with the plug seated. This may cause irreparable
damage to the seating faces.
6.4 Install series 2 actuator
(see Fig. 1a)
The actuator stem must be fully extended:
Actuators with air-to-open action must be fully
vented. Actuators with air-to-close action apply
supply pressure.
Manually depress the plug stem to ensure the plug
is fully seated.
6.4.1 Screw coupling insert locknut and coupling insert as
far as possible onto plug stem.
6.4.2 Place the actuator assembly on the valve engaging
the yoke rod threads in the lower yoke plate and
ensuring the actuator faces in the correct direction.