4
REGAL 3F
O
270
100
100
365
30
0
181
177.5
148
O 166
83
253
40
*
40
*
30
180*
DIMENSIONS AND WEIGHTS
Weight
With slam shut: 18.8 kg VSX2 / 24 kg OS2
Without slam shut : 18 kg
* Disassembly
dimentions
Figure 3.
Type Regal 3F/VSX2 and Type Regal3F/OS2 Dimensions (mm)
OPERATION
The type Regal 3F is a pressure regulator with expansion
achieved by a balanced valve plug and pressure control by a
direct-operated actuator.
The balanced valve plug/stem assures accuracy
independent of inlet and outlet pressures.
Pressure control is achieved through the actuator
diaphragm, which receives, on the one side, the outlet
pressure and, on the other side the spring load, adjusted to
the desired value by the set point spring.
Tight shutoff is ensured by the regulator plug disc pushing
on the ori
fi
ce.
The regulator can be equipped with a slam shut using a
release relay types VSX2 or OS2.
In the case of temporary over pressure, the diaphragm plate
assembly will travel up the actuator and sit into the cap, without any
leak or deterioration of the components (disconnector).
Figure 4.
Type Regal 3/VSX2 and Type Regal3/OS2
Operational Schematic
OS2
VSX2
Pu
Pd
Adjustment screw
Resetting button
