Flowserve Spring Diaphragm Rotary Actuators - Manual (Page 4)

Spring Diaphragm Rotary Actuators FCD VLAIM050-01 – 05/12
4
Unpacking
1. While unpacking the actuator, check the packing list against the
materials received.
2. When lifting the actuator from the shipping container, position
lifting straps and hoist to avoid damage to tubing and mounted
accessories.
WARNING: When lifting an actuator with lifting straps, be aware
the center of gravity may be above the lifting point. Therefore,
support must be given to prevent the actuator from rotating.
Failure to do so can cause serious injury to personnel and
damage to actuator or nearby equipment.
3. Contact your shipper immediately for any shipping damage.
4. Contact your Flowserve representative for any problems.
Installation
Notice that the NR actuator has (4) rubber plugs (436) in the
diaphragm box (202). These rubber plugs (436) function as a drain.
After the valve is installed, remove one of the 4 plugs (436) that will
allow any moisture that develops in the diaphragm box to drain out.
Leave the other 3 plugs in place.
Changing Air Action
Follow all steps carefully, actuator spring is under compression
1. Position valve vertically
• It is easier to change the air action with the valve in this position.
2. Remove cover plates and positioner
• Remove the (4) bolts (337) in the cover plate and remove
the cover plate (363). Remove the (4) bolts (337) in the
posi tioner cover plate and remove the positioner cover plate.
NOTE: It is easier to leave the positioner mounted to the cover
plate.
3. Remove hand wheel (See Kit #397 Handwheel Assembly) and
Limit stop (See Kit #330 Limit Stop Sub-Assembly)
• If a hand wheel is used it will have to be removed along with the
limit stop.
• If no hand wheel is used this step can be skipped. You will need
to loosen the limit stops and back them out a few turns, but
they do not need to be removed.
• There are two set screws (5) that hold the hand wheel nut (7) in
place, loosen these and remove the hand wheel nut (7).
• Remove the hand wheel drive shaft from the transfer case.
• Remove Limit stop (See Kit #330 Limit Stop Sub-Assembly).
4. Position the valve at mid stroke and remove the clevis pin snap ring
(250)
• By using a regulated air supply, the spring in the diaphragm
box is compressed. Position the valve at mid stroke to relieve
spring compression.
• Remove the lower snap ring (250)
• The clevis pin (361) should slide freely up and down, for size
NR1 & NR2 actuators. It will be tight for size NR3.
5. Remove the clevis pin (361)
• Keep the valve positioned at mid stroke to relieve spring
compression.
• Remove the clevis pin (361), it should slide freely for actuator
sizes NR1 & NR2.
NOTE: For size NR3 actuators, the clevis pin (361) will be tight and
might require a punch to drive it out.
6. Separate the clevis (364) and the lever (See Kit #249
Lever Sub-Assembly)
• Turn the Air supply pressure to 0, or remove the air supply.
• The clevis (364) and the lever will slide apart easily now as
you relieve air pressure.
7. Remove the diaphragm box nuts (369)
• Remove the diaphragm box nuts from the transfer case.
8. Remove the diaphragm box assembly (202)
9. Remove the diaphragm box plugs (407 & 406)
• Remove the black square rubber plug (407) and the 2 small
round rubber plugs (406) install them in the opposite side of the
transfer case.
• The purpose of these plugs is to seal the transfer case. This is the
unused flange for the diaphragm box.
10. Loosen the clevis nut (365) on the clevis (364)
• Loosen the clevis nut (365) between the actuator stem (211) and
the clevis (364).
• This has to be loosened so it can swivel and fit in the transfer
case correctly with the new air action.
11. Install the diaphragm box assembly (202) on the opposite side
• Install the diaphragm box assembly on the opposite side of the
transfer case.