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Type S402Y
Specifications
Body Size and End Connection Styles
NPS 3/4 or 1, NPT
Maximum Operating inlet Pressure
125 psig (8,6 bar)
Maximum allowable Emergency inlet Pressure
175 psig (12,1 bar)
allowable Outlet Pressures (Casing)
Emergency: 10 psig (0,69 bar)
Maximum Operating to avoid internal Part
Damage: 5 psig (0,35 bar)
Outlet Pressure Ranges
See Table 2
Orifice Sizes
See Table 1
1. End connections threaded to other than ASME standards can usually be supplied.
2. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Table 1. Orifice Sizes and C
ORiFiCE SizE
inches
1/8
3/16
1/4
1. Maximum operating inlet pressure is 125 psig (8,6 bar) for all orifice sizes. The optimum performance is based on 2-inches w.c (5 mbar) boost or 1-inch w.c. (2 mbar) droop.
Table 2. Outlet Pressure Ranges and Control Spring Data
OuTlET PRESSuRE RangES
4.5 to 6-inches w.c. (11 to 15 mbar)
5.5 to 8-inches w.c. (14 to 20 mbar)
7.5 to 9.5-inches w.c. (19 to 24 mbar)
9.5 to 13-inches w.c. (24 to 32 mbar)
13-inches w.c. to 1.5 psig (32 mbar to 0,10 bar)
1.5 to 2.5 psig (0,10 to 0,17 bar)
Principle of Operation
Inlet pressure flows through the open orifice around
the valve disk and disk holder, around the cam stem
down the remaining length of the orifice tube and into
the outlet of the regulator body. However, not all of the
pressure passes directly from the inlet to the outlet of
the regulator. Pressure is channelled through openings
in the orifice tube and pressurizes the cavity formed by
the body and diaphragm/diaphragm head/cam stem
2
(1)
(2)
(2)
(2)
Coefficients
g
ORiFiCE
COlOR CODE
mm
3,2
Blue
4,8
Green
6,4
Brown
Part number
T13539T0012
T13527T0012
T13563T0012
T13529T0012
T13564T0012
T13536T0012
Temperature Capabilities
-20° to 160°F (-29° to 71°C)
Pressure Registration
Internal
Spring Case Vent Connection
(2)
1 NPT with removable screen (standard)
3/4 NPT with removable screen (optional)
Spring Case Vent and Body Mounting Positions
See Figure 5
External Dimensions
See Figure 6
approximate Weight
4 pounds (2 kg)
WiDE-OPEn C
FOR
g
REliEF Sizing
12.5
28.2
50.0
COnTROl SPRing DaTa
Color
Wire Diameter, inches (mm)
Red
0.070 (1,78)
Yellow
0.067 (1,70)
Olive drab
0.067 (1,70)
Green
0.075 (1,91)
Unpainted
0.120 (3,05)
Blue
0.120 (3,05)
assembly. When downstream demand is reduced, the
pressure under the diaphragm increases. This pressure
overcomes the regulator setting (which is set by a
spring) and moves the diaphragm assembly upwards.
This upward motion is transferred to the cam stem which
in turn bears against the sliding contact point on the
back side of the disk holder.
The inclined surface of the cam then forces the disk
holder toward the orifice and reduces gas flow. If a higher
(2)
MaxiMuM OPERaTing PRESSuRE FOR
OPTiMuM PERFORManCE
Psig
125
80
60
Free length, inches (mm)
2.50 (63,5)
2.59 (65,8)
3.24 (82,3)
3.00 (76,2)
1.93 (49,0)
2.60 (66,0)
(1)
bar
8,6
5,5
4,1
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