PRX Series
2
Maximum Inlet Pressures
(1)
See Table 2
Outlet (Control) Pressure Ranges
See Table 1
Accuracy Class
See Table 1
Temperature Capabilities
(1)
-4 to 140°F / -20 to 60°C
Pilot and Filter Regulator Flow Coefficients
Type PRX Pilot:
C
g
:
10.5;
C
v
:
0.36;
C
1
:
29
Type SA/2 Filter Regulator:
C
g
:
4.9
1. The pressure/temperature limits in this Instructional Manual and any applicable standard or code limitation should not be exceeded.
Table 1.
Outlet (Control) Pressure Ranges, Accuracy Class and Pilot Spring Information
TYPE
OUTLET (CONTROL)
PRESSURE RANGE
(AC)
ACCURACY
CLASS
PILOT CONTROL SPRING INFORMATION
Part Number
Color Code
Wire
Diameter
Free Length
Maximum
Operating
Pressure
Maximum
Emergency
Pressure
psig
bar
In.
mm
In.
mm
psig
bar
psig
bar
PRX/120
PRX/125
14.5 to 26
23 to 44
41 to 80
73 to 123
1.00 to 1.8
1.6 to 3.0
2.8 to 5.5
5.0 to 8.5
± 2.5%
± 2.5%
± 2.5%
± 2.5%
M0255240X12
M0255230X12
M0255180X12
M0255220X12
Yellow
Green
Blue
Black
0.110
0.126
0.138
0.157
2.79
3.20
3.55
3.99
2.16
2.16
2.16
2.16
55.0
55.0
55.0
55.0
- - - -
- - - -
116 to 210
203 to 334
319 to 435
8.0 to 14.5
14.0 to 23.0
22.0 to 30.0
± 1%
± 1%
± 1%
M0255210X12
M0255200X12
M0255860X12
Silver
Gold
Aluminum
0.177
0.197
0.236
4.50
5.00
5.99
2.16
2.01
2.01
55.0
51.0
51.0
- - - -
- - - -
PRX/120-AP
PRX/125-AP 435 to 1160 30.0 to 80.0
± 1%
M0273790X12
Clear
0.335
8.51
3.94
100
- - - -
- - - -
PRX/131
14.5 to 26
23 to 44
41 to 80
73 to 123
116 to 210
203 to 334
319 to 435
1.0 to 1.8
1.6 to 3.0
2.8 to 5.5
5.0 to 8.5
8.0 to 14.5
14.0 to 23.0
22.0 to 30.0
- - - -
M0255240X12
M0255230X12
M0255180X12
M0255220X12
M0255210X12
M0255200X12
M0255190X12
Yellow
Green
Blue
Black
Silver
Gold
Red
0.110
0.126
0.138
0.157
0.177
0.197
0.236
2.79
3.20
3.55
3.99
4.50
5.00
5.99
2.16
2.16
2.16
2.16
2.16
2.01
2.01
55.0
55.0
55.0
55.0
55.0
51.0
51.0
435
30.0
1480
102
PRX-AP/131 435 to 1160 30.0 to 80.0
- - - -
M0273790X12
Clear
0.335
8.51
3.94
100
1160
80.0
PRX/182
29 to 116
73 to 290
217 to 609
2.0 to 8.0
5.0 to 20.0
15.0 to 42.0
- - - -
M0255220X12
M0255200X12
M0255190X12
Black
Gold
Red
0.157
0.197
0.236
3.99
5.00
5.99
2.16
2.01
2.01
55.0
51.0
51.0
609
42.0
PRX-AP/182 435 to 1160 30.0 to 80.0
- - - -
M0273790X12
Clear
0.335
8.51
3.94
100
1160
80.0
1. Accuracy includes outlet pressure drop plus hysteresis (friction), but does not include lockup.
2. Restrictor screw is one turn counterclockwise from fully seated.
MAXIMUM INLET
PRESSURE
MAXIMUM EMERGENCY OUTLET
PRESSURE OR MAXIMUM
EMERGENCY SENSE PRESSURE
(1)
MAXIMUM BLEED
(EXHAUST) PRESSURE FOR
MONITOR PILOTS
MAXIMUM PILOT SPRING CASE
PRESSURE FOR
PRESSURE LOADING
psig
bar
psig
bar
psig
bar
psig
bar
1480
102
1480
102
1480
102
1160
80
1. Maximum pressure to prevent the casings from bursting during abnormal operation (leaking to atmosphere and internal parts damage may occur).
Table 2.
PRX Series Pilot Pressure Ratings
Threaded Connections
1/4 NPT
Orifice Size
0.12 in. / 3.0 mm
Type SA/2 Allowable Pressure
(1)
1450 / 100 bar
Options
Type 252 Pilot Supply filter
Specifications
The Specifications section lists pressure limitations and other specifications for all models of PRX Series pilots. Please note
that the pilot control spring range is displayed on the pilot nameplate.
