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Flowserve Spring Diaphragm Rotary Actuators Manual de usuario Pagina 4

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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t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.
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