Type 289P
8
2. Install the plug/stem guide (key 9) if it was removed.
3. Install the restriction plug (key 20) if it was removed.
4. If removed, install the plug/stem assembly (key 4)
and plug/stem spring (key 14) into the diaphragm
assembly (key 5). Install a replacement connector
cap gasket (key 36) on the diaphragm assembly
connector, and secure with the connector
cap (key 6).
5. Install the diaphragm assembly (key 5) and push
down on it to see if the plug/stem assembly
(key 4) strokes smoothly. The diaphragm assembly
should stroke approximately 1/16-inch (1,6 mm)
after the valve plug contacts the port.
Note
In step 6, if installing a control spring of
a different range from the one that was
removed, be sure to delete the spring
range originally appearing on the spring
case and indicate the new spring range.
6. Stack the control spring (key 7) and control spring
seat (key 8) onto the diaphragm assembly (key 5).
7. Install the spring case (key 2) on the body (key 1)
with the vent assembly (key 16) oriented to prevent
clogging or entrance of moisture. Install the machine
screws (key 17) and, using a crisscross pattern,
torque them to 5 to 7 foot-pounds (7 to 9 N•m).
8. Tighten the locknut (key 11), replace the closing cap
gasket (key 19) if necessary, and install the closing
cap (key 12).
Parts Ordering
When corresponding with a local Sales Ofce
concerning this relief valve, include the type number
and all other pertinent information stamped on the pilot
spring and main valve nameplate. Specify the eleven-
character part number when ordering new parts from
the following parts list.
Parts List
NPS 1 Type 289P Main Valve (Figure 4)
Key Description Part Number
1 Body, Aluminum 3U888208012
2 Spring Case, Aluminum 2P901508012
Key Description Part Number
3 Diaphragm Head, Aluminum 1D666428982
4 Spring Seat, Cadmium plated steel 1D667125072
5* Diaphragm, Nitrile (NBR) 24B5622X012
6 Adjusting Screw, Steel 1F710532982
7 Spring, steel
10 to 30 psig (0,69 to 2,1 bar) 1F826927022
30 to 100 psig (2,1 to 6,9 bar) 1D892327022
8 Machine Screw, Steel (8 required) 1A391724052
9 Screen, Monel
(1)
1E564843122
11* Gasket, Copper (2 required) 0Y008915042
13* Snap Ring, Carbon steel 13A9938X012
15 Gasket, Composite 13A9929X012
16 Nameplate, Aluminum - - - - - - - - - - -
17 Lower Spring Guide, Cadmium plated steel 1D666625072
18 Pitot tube, Aluminum 17A8789X012
19* Gasket, Composite 1F826804022
20* O-ring, Nitrile (NBR) 1F269206992
21 O-ring Holder, Aluminum 1F826409012
22 O-ring Washer, Aluminum 1F826509012
23 Spacer, 303 Stainless steel 14A9683X022
24 Hex Nut, Cadmium plated steel 1A499724122
27 Washer, Aluminum 1F826709012
28 Pipe Plug, Cadmium plated steel T13718T0012
29 Machine Screw, Steel (2 required) (not shown) 1H526928982
30* O-ring, Synthetic rubber (2 required) 1D687506992
31 Stem Guide Assembly
Zinc with 303 Stainless steel 1F8272X0012
Zinc with Brass 1F8272000A2
36 Pitot Tube Plug 1B561428982
37 O-ring, Nitrile (NBR) 1E216306992
NPS 2 Type 289P Main Valve (Figure 5)
Key Description Part Number
Parts Kits (Included are keys 5, 9, 15,
19, 20 and 38), Nitrile (NBR) R289HX00022
1 Valve Body, Cast iron 31B1992X012
2 Spring Case, Aluminum 3K129444022
3 Diaphragm Head, Plated steel 0W020225072
5* Diaphragm, Nitrile (NBR) 24B6447X012
6 Adjusting Screw, Zinc 1B537944012
7 Spring, Plated steel
14-inches to w.c. to 2 psig
(35 mbar to 0,14 bar), white 1B536427152
2 to 10 psig (0,14 to 0,69 bar), dark blue 1B536527052
8 Cap Screw, Plated carbon steel (8 required) 1A407824052
9* Screen 11B1994X012
10* Orice, Brass 1E702613012
11 Hex Nut, Zinc-plated steel 1A309324122
13 Snap Ring 10B9241X012
14 Closing Cap, Zinc T11069X0012
15* Gasket, Neoprene (CR) 1P753306992
17 Spring Seat, Zinc-plated steel 1D779925062
18 Stem, Brass 17A8788X012
19* Gasket, Composition (3 required) 1D779804022
20* O-Ring, Nitrile (NBR) 1P336106992
22 O-Ring Washer, Stainless steel 1E702136072
23 Spacer, Brass 1E702214172
24 Hex Nut, Plated carbon steel 1B228228982
26 Lower Diaphragm Head, Plated steel 1E703125072
27 Washer, Aluminum 1C680511032
28 Pipe Plug, Plated carbon steel T13718T0012
29 Machine Screw, Plated carbon steel (4 required) 1F386528992
31 Stem Guide Assembly, Cast iron plate 1E7028000A2
38* Gasket 11B1993X012
*Recommended spare part.
1. Monel
®
is a marked owned by Special Metals Corporation.