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9
NOTE:If the seal wave springs are not properly aligned and seated the plug seal may not hold rated
differential pressure.
3. Install the seal back-up plate (143) against the shoulder in the plug.
4. Lubricate and install the plug seal o-ring (149) on the stainless steel portion of the plug seal
assembly (142). Lubricate and install the plug seal assembly into the plug with the plug seal o-ring
properly positioned.
NOTE:Press seal assembly into the plug using hand force only, taking care not to damage seal
assembly.
5. Install the correct number of scraper wave springs (158) followed by the scraper (154) into the
plug over the seal assembly. For NPS 2" Multiports, install two scraper wave springs. For NPS
3" and NPS 4" Multiports, install one scraper wave spring.
NOTE:Lubricate the spring and scraper so that they stay in place in the plug during assembly.
Ensure that the scraper fits freely into the plug. Check by pushing the scraper into the plug using
both hands then letting go to see if it returns to its original position.
6. Ensure that the plug bushing (120) has been lubricated and installed into the lower section of the
body.
7. Lower the plug (130) vertically into the body ensuring that the plug seal assembly (142) and
scraper (154) clear the body (110) bore. When installed, the plug (130) rests on top of the bushing
(120).
8. Grease the tapered bearing cone and rollers (160) and install onto the plug.
C. BONNET: (162)
1. Lubricate and press fit the bearing cup (160) into the bonnet.
2. Lubricate and install the correct number of PTFE backup rings (170) and the upper plug o-ring
(167) into the bonnet bore’s upper groove. For ANSI 300/600 rated Multiports, install one PTFE
backup ring above the upper plug o-ring. For ANSI 900/1500 rated Multiports, install two backup
rings - one on either side of the upper plug o-ring.
3. Lubricate and install the upper plug polypak (164) into the bonnet (polypak is not required for
NPS 2" or NPS 3" ANSI 300/600 Multiports).
4. Lubricate and install the bonnet o-ring (173) into the bonnet’s outer groove.
5. From the bonnet’s top surface, lubricate and install the wiper (171) and grease fitting (178).
NOTE:Pump grease through the grease fitting (178) to fill the bearing bore.
6. For NPS 3" ANSI 900/1500 and all NPS 4" Multiports, install the injection nipple (177), 90°
elbow (175), nipple, ball valve (174) and vent plug (176), ensuring that they are clean and well
oiled.
7. Position the bonnet onto the Multiport body. For NPS 2" and NPS 3" ANSI 300/600 Multiports,
set the bonnet in place with the actuator mounting holes straddling the centreline of the group
outlet port. Use two lifting eyes installed into the jacking screw holes provided in the bonnet for
NPS 3" ANSI 900/1500 (3/4 NC) and all NPS 4" (1/2
NC) Multipo
rts to vertically lift and set the