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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
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CONTROL SPRING
DIAPHRAGM
DISK HOLDER
SPARE DISK
VALVE DISK
BOTTOM CAP
VALVE SPRING
M1015
INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE
Figure 2.
Type 1301F Operational Schematic
Table 1.
Outlet Pressure Ranges
TYPE
OUTLET PRESSURE
RANGES
(1)
SPRING COLOR
SPRING PART NUMBER
SPRING WIRE DIAMETER
SPRING FREE LENGTH
psig
bar
In.
mm
In.
mm
1301F
10 to 75
0.69 to 5.2
Blue
1D387227022
0.200
5.08
1.69
42.9
50 to 150
3.4 to 10.3
Silver
1B788527022
0.225
5.72
100 to 225
6.9 to 15.5
Red
1D465127142
0.243
6.17
1301G
200 to 500
13.8 to 34.5
Silver
1K156027142
0.331
8.41
0.88
22.4
1. All springs can be backed off to 0 psig / 0 bar.
Principle of Operation
The 1301 Series regulators are direct-operated.
Downstream pressure is registered internally through
the body to the underside of the diaphragm. When
downstream pressure is at or above set pressure,
the disk is held against the orifice and there is no
flow through the regulator. When demand increases,
downstream pressure decreases slightly allowing the
regulator spring to extend, moving the yoke and disk
assembly down and away from the orifice. This allows
flow through the body to the downstream system. As
the downstream pressure reaches its setpoint, it starts
to overcome the spring force, which is sensed by the
diaphragm, moving the yoke and disk assembly up near
its orifice, restricting flow across the regulator.
