Emerson ANDERSON GREENWOOD 727 Installation And Maintenance Instructions Manual page 5

ANDERSON GREENWOOD TYPE 727 DUAL PILOT MANIFOLD
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Assembly – Main valve with drain plunger
in cap
1. Note: before assembly, clean all valve parts
thoroughly with oil-free solvent and dry,
paying particular attention to all sealing
surfaces. Do not bead or sandblast. Check
both damper and nozzle for matching orifice
'letter' designators before assembling.
2. Install extrusion ring (14) with radius edge
into flange corner, fit nozzle seal (15)
around bottom of nozzle (3) (see detail E
in Figure 2). Install nozzle in valve body and
lightly secure nozzle with new retaining
screws (9) and new belleville washers (23)
(see detail G in Figure 2 for washer stack
orientation). Note that all valve sizes use six
washers per screw except the 4 x 6 valve
size which uses seven washers per screw.
Use a 12 point socket to tighten screws
in a clockwise pattern, one revolution
per screw, until all screws are seated
fully. This procedure will ensure proper
compression of new nozzle seal. Do not
tighten screws alternately as this method
could cause seal failure.
3. Stand valve on its outlet flange; install
liner (5) in valve body. Lubricate 45° step
in liner with silicone grease.
4. If a piston installation sleeve is used, (see
Section 13.7 for details) place sleeve on top
of liner. Lubricate ID of sleeve with silicone
grease. Wipe both piston and nozzle sealing
surfaces with a clean, lint free, cloth or rag
wetted with clean degreasing fluid. Insert
piston into sleeve to compress rings with
radial hole in piston toward valve inlet (refer
to Figure 2). Insert and center a wooden
or plastic dowel into piston and lightly tap
piston into liner approximately half way.
Remove installation sleeve and press
piston down to nozzle. Install spring (10),
damper (8) and liner seal (13).
If an installation sleeve is not used, lubricate
the ID of liner at both top and mid point with
silicone grease. Carefully insert piston with
the radial hole toward valve inlet (refer to
Figure 2). Insert and center a wooden or
plastic dowel into piston. Push in top ring
with screw driver. Lightly tap piston into
liner. Press piston down to nozzle. Install
spring (10), damper (8) and liner seal (13).
5. Reassemble drain plunger (17) and spring
(16) into cap (2) and check for freedom of
movement. Apply Never-Seez to the threads
and the sealing edge of the drain plug (18)
and screw into the cap by hand and tighten
to 35-40 ft·lb torque using a calibrated
torque wrench. For valves in steam
service with standard internal sense, apply
Never-Seez to the threads and the sealing
edge of the port plug (93A) and screw into
the cap by hand and tighten to 35-40 ft·lb
torque using a calibrated torque wrench.
For valves with remote sense or snubber
options, install remote sense/snubber fitting
(93,B,C,D) by lightly lubricating the cap bore,
the insert's extension barb end, sealing
edge and mounting thread. Screw the insert
into the cap port as far as possible by hand.
Using a wrench, screw the connector into
the cap slowly until it is fully seated. Finally,
using a calibrated torque wrench, tighten
the connector to 65-70 ft·lb torque to seat it
in the cap body.
6. Insert filter (19) into port in valve body and
slide a new dipper tube seal (20) over the
filter sleeve (see Figure 2, detail F).
Note: the manifolded valve requires an ⅛"
thick dipper tube seal Part no. 06.0553.002.
Do not use the " thick dipper tube seal
1 /
16
Part no. 06.0553.001 in this assembly.
See section 12 for repair kit information.
7. Position mating hole in cap assembly over
the filter assembly sleeve and lower onto
studs, checking that damper is centered
into cap recess before cap seats against
valve body. A " to ⅛" gap must be visible
/
1
16
between cap and body. This indicates cap
is in proper contact with the liner seal.
Alternately tighten opposite cap nuts to
maintain parallelism between cap and body
until cap is solid against body face. Torque
nuts to values in Table 1.
8. For valves in steam service, reconnect
tubing from unloader to outlet flange.
If tubing fittings have been removed, coat
fitting NPT threads with Never-Seez before
reinstalling. Refer to Section 13 for thread
seal information.
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