Flowserve Noble Alloy Ball Valve IOM - Manual (Page 5)

August 22, 2002, Rev. 2 3
3.0 ASSEMBLY
3.1 Fixture the body (1) so the ball cavity is facing up. (In the case of 3 piece valves, assemble
one tailpiece to the body and then proceed with the standard assembly instructions.) Be sure
the body studs (14) are installed and equal in length. If the stem has a "c" clip retainer, install
the stem from the topside of the stem bore so it protrudes into the ball cavity, place the "c" clip
in the stem groove, and pull the stem tight into the stem bore. "C" clipped stems are only
found in valves with 1/2" or 3/4" bore balls and valves equipped with the Fugitive emission
package. Place a seat (4) into the seat pocket in the body with the conical seal face up.
Seats are not matched sets and can be installed on either side. Metal and soft seats are
interchangeable with each other. Insert the ball (3) into the body with a rocking motion so the
ball slot engages the stem tang.
3.2 Place a new body seal (7) onto the seal land on the face of the tailpiece (2). Install the second
seat into the seat pocket of the tailpiece. Carefully slide the tailpiece onto the body studs and
onto the body, making sure the seat and body seal remain in place. Once the tailpiece is in
place, install the body nuts (16) and torque to the proper specification listed on the torque
chart for that size nut. This will crush the body seal and pre-load the seats. The torque chart
is located in the specification section at the back of this manual. Check the body joint with a
feeler gauge. The joint gap must not exceed .001". If an excessive gap remains after the
body nuts have been torqued, place the valve in a hydraulic press and press until the .001"
feeler gauge cannot be insert in the joint. Re-torque the body nuts while still under pressure
on the press.
3.3 Fixture the assembled body so the stem is facing up. Slide the new packing (9) over the stem
and work into the body packing bore. In case of the fugitive package, next install the lantern
ring (25), block seal (26), FEM block (if supplied on Custom Ball valve)(27), and then the
second packing. The packing follower (10) can be used to help push the packing down.
Install the packing follower (10) onto the stem with the relief for the springs facing up, away
from the body. Place the packing springs (11) over the stem and onto the packing follower.
The dished side of the springs should face up, away from the body. Place the spring cap (12)
over the springs so it encapsulates the springs. Place the thrust bearing (13) over the stem
until it bottoms out on the land on the stem. It will sit partially in the spring cap. Install the
retainer studs (15) into the body until they bottom in the threads. Place the shear collars (23)
(if equipped) over the retainer studs and engage them into the body. Apply some anti-seize
compound to the emergency packing adjusting set screws (18) and screw them into the
retainer (8) until the ends of the screws are flush with the inside bore on the retainer. They
should not stick out into the spring cap bore. They may protrude slightly out the top of the
retainer. Install the retainer (8) over the studs and drop it into place over the stem parts.
Place the adjustable stop collars (19) over the retainer studs (15), install the retainer nuts (17)
but do not tighten fully. Install the handle (21) over the stem and place the set screw (22) into
the handle and tighten.
3.4 The only feature that requires adjustment on the Flowserve/Noble Alloy valve is the adjustable
stop collar (E) feature on the handle operated valves. Actuated valves do not have stop
collars. The packing does not require any further adjustment after the valve has been
assemble due to the live loaded design. Rotate the handle to open the valve to the full open
position and align the ball bore so that it is centered with the conduit of the valve. With the
retainer nuts (17) loosened, rotate one of the stop collars (19) until it contacts the ear on the
handle stop. Tighten the nut fully. Rotate the handle a few times to check the alignment and
readjust if necessary. Rotate the handle to close the valve, which will position the handle 90
degrees to the bore of the valve. Rotate the other stop collar (18) until it firmly touches the
handle stop and tighten the nut fully. Rotate the handle a few times open and closed and
check the alignment. Readjust if necessary. The valve is now ready for testing.