Type Prx/120 Connections; Parts Ordering; Parts List; Prx Series Pilots - Emerson Tartarini PRX Series Instruction Manual

PRX Series
CODE
A
B
S
L
9. Lightly lubricate the outer and inner rims of the diaphragm
(key 18). Place the diaphragm assembly on top of the
regulator seat (key 5). The screw unit (key 17) will slide
into regulator seat (key 5). Use care to avoid damage to
parts when reassembling.
10. Set the spring (key 1) on top of the nut (key 21).
11. Align the regulator cover (key 19) over the body (key 7)
with the sense port (V) opposite the pilot supply port (R).
12. Place the filter pad (key 12) and filter nets (key 8),
one on each side of the filter pad, on the filter cover
(key 11).
13. Pick up the body (key 7) and place it on the filter cover
(key 11) with the inlet port (M) aligned vertically with the
sense port (V).
14. Insert cap screws (key 2). Place washers (key 9) and nuts
(key 10) on the end of the cap screws. Tighten the nuts.

Parts Ordering

Each pilot type in PRX Series is assigned a serial number,
which can be found on the nameplate. Refer to the number
when contacting your local Sales Office for technical
information or when ordering parts. When ordering
parts, also be sure to include the complete 11-character
part number.
Type SA/2 parts can also be ordered. Please provide the
11-character part number and the technical information
stamped on the nameplate when contacting your local
Sales Office.

Parts List

PRX Series Pilots (Figure 2)
Key Description
Parts Kits
Elastomer Parts Kits
(includes keys: 4, 5, 14, 17, 18, 25 and 28)
Types PRX/120, PRX/120-AP, PRX/125
and PRX/125-AP
Nitrile (NBR)
Fluorocarbon (FKM)
1 Adjusting Screw, Stainless steel
2 Locknut
3 Cap, Steel
*Recommended Spare Part
8
Table 4. Type PRX/120 Connections
UNLOADING OR BOOT STYLE
Downstream Sense Line
Outlet discharge
Pilot feed
To regulator loading pressure chamber
Key Description
4* Upper Cover O-ring
(1 required for Type PRX/120 or
5* O-ring
Nitrile (NBR)
Fluorocarbon (FKM)
6 Upper Spring Seat, Stainless steel
7 Spring
8 Upper Cover, Steel
9 Lower Spring Seat, Stainless steel
10 Machine Screw, Zinc-plated steel (12 required)
11 Washer (14 required)
12 Filter
13 Upper Diaphragm Plate,
Stainless steel (2 required)
14* Diaphragm
Nitrile (NBR)
Fluorocarbon (FKM)
15 Lower Diaphragm Plate, Stainless steel
16 Body, Steel
17* Orifice O-ring
Nitrile (NBR)
Fluorocarbon (FKM)
18* Lower Cover O-ring (2 required)
Polyurethane (PU)
Fluorocarbon (FKM)
19 Orifice, Steel
20 Nut, Steel
21 Lower Cover, Steel
22* Disk
Polyurethane (PU)
Fluorocarbon (FKM)
23 Stem, Steel
24 Nameplate
25* Stem O-ring
Nitrile (NBR)
Fluorocarbon (FKM)
26 Upper Diaphragm Nut
Part Number
27 Damper Adjusting Screw
with Hole, Stainless steel
28* Restrictor/Damper O-ring (2 required)
29 Damper/Restrictor Plate
Types PRX/120 and PRX/120-AP
Types PRX/125 and PRX/125-AP
30 Ring Nut (2 required)
31 Nameplate Screw
RPRX00X0N12
32 Restrictor Adjusting Screw with Hole
RPRX00X0F12
33 Plug (Types PRX/125 and PRX/125-AP Only)
34 Plug (Types PRX/125 and
M0253340X12
M5036008X12 PRX/125-AP Only), Brass
35 Spring Barrel Extension for AP, Steel
M0253350X12
TWO-PATH OR LOADING STYLE
Downstream Sense Line
Outlet discharge
To regulator loading pressure chamber
PRX/125, 2 required for
Type PRX/120-AP or PRX/125-AP)
Nitrile (NBR)
Fluorocarbon (FKM)
Pilot feed
Part Number
M6010178X12
M6020112X12
M6010005X12
M6020001X12
M0253360X12
See Table 1
M0298540X12
M0253380X12
M5011018X12
M5055001X12
M4500367X12
M0253390X12
GG05785X012
GG05785X022
M0253410X12
M0253310X12
M6010003X12
M6020126X12
M6010098X12
M6020132X12
M0253440X12
M5002004X12
M0298600X12
ERAA11220A0
M0279950X12
M0253430X12
- - - - - - - - - - -
M6010223X12
M6020133X12
M5028005X12
M0253480X12
M6020054X12
M0254400X12
M0257930X12
M0253490X12
M5061001X12
M0253480X12
M0257920X12
M4500328X12
M0274100X12