Emerson VSX4 Series, Instruction Manual

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Table 3. Combined Overpressure and Underpressure Shutoff (OPSO and UPSO) Spring Ranges
Principle of Operation
VSX4 and VSX8 Series Controller
The pressure measuring element of the controller consists
of a diaphragm that senses downstream pressure. The
downstream pressure is controlled by the regulator. The
overpressure shut-off spring and under-pressure shut-off
spring exerts force on the top side of the diaphragm.
When the downstream pressure increases above the
Overpressure Shutoff (OPSO) setting, the diaphragm
moves up.
When the downstream pressure decreases below the
Underpressure Shutoff (UPSO) setting, the diaphragm
moves down.
Both of these actions result in the rotation of the cam and
the release of the reset pin.
The valve plug spring then pushes the valve plug against
the regulator port, stopping the flow of gas. The reset
button is then used to reset (relatch) the controller
(refer to the Resetting Procedure section for detailed
resetting instructions).
Standard downstream pressure registration for the
controller is external; however, internal sensing line is made
available by removing the downstream sense blocking
screw, installing a 1/4 NPT plug in the control line port and
removing the downstream control line.
aCCUraCY grOUP (ag) P
d
< 35 mbar / 0.507 psig
35 mbar / 0.507 psig ≤ P
d
< 60 mbar / 0.87 psig
60 mbar / 0.87 psig ≤ P
d
< 100 mbar / 1.5 psig
P
d
≥ 100 mbar / 1.5 psig
AG
min
30 15
10 5
AG
max
10 10
Note: Stable inlet pressure AG
min
= AG 10 (P
d
< 60 mbar / 0.87 psig) and AG 5 (P
d
> 60 mbar / 0.87 psig), AG
max
= AG 5
Table 4.
Controller Accuracy in Accordance to EN 14382
SLaM SHUT DEViCE
Type
inlet Pressure
Under Pressure
Shut-off (UPSO)
UPSO Spring
Over Pressure
Shut-off (OPSO)
OPSO Spring
Set range
Part number Spring Color
Set range
Over UPSO Setpoint
Part number Spring Color
bar psig mbar psig mbar psig
VSX4L
VSX8L
8.6 125
7 to 11
ERAA05835A0 White
30 to 44
GF02167X012 Black 7 to 15 32 to 44
7 to 30 3 to 12 in. w.c.
41 to 44 16 to 18 in. w.c.
40 to 76 16 to 29 in. w.c.
GF02168X012 Brown
10 to 75
4 in. w.c. to
1.1 psig
T14169T0012 Blue
48 to 74 19 in. w.c. to 1.1 psig
50 to 122 20 in. w.c. to 1.8 psig GF02169X012 Red
25 to 160
10 in. w.c. to
2.3 psig
T14170T0012 Silver 83 to 221 1.2 to 3.2
GF02170X012 Orange
100 to 500 1.5 to 7.3 FA142869X12 Orange Stripe
114 to 261 1.7 to 3.8
179 to 386 2.6 to 5.6 GF02171X012 Pink
241 to 565 3.5 to 8.2 GF02172X012 Green
100 to 750 1.5 to 10.9 T14171T0012 Olive 460 to 932 6.7 to 13.5 GF02173X012 Silver
16 232
7 to 30 3 to 12 in. w.c. ERAA05835A0 White
40 to 55 16 to 22 in. w.c. GF02167X012 Black
45 to 76 18 to 30 in. w.c.
GF02168X012 Brown
10 to 75
4 in. w.c. to
1.1 psig
T14169T0012 Blue
50 to 80 20 in. w.c. to 1.1 psig
62 to 132 25 in. w.c. to 1.9 psig GF02169X012 Red
25 to 160
10 in. w.c. to
2.3 psig
T14170T0012 Silver 83 to 221 1.2 to 3.2
GF02170X012 Orange
100 to 500 1.5 to 7.3 FA142869X12 Orange Stripe
114 to 261 1.6 to 3.8
179 to 386 2.6 to 5.6 GF02171X012 Pink
241 to 565 3.5 to 8.2 GF02172X012 Green
100 to 750 1.5 to 10.9 T14171T0012 Olive 460 to 932 6.7 to 13.5 GF02173X012 Silver
VSX4H
VSX8H
16 232
500 to 2000 7.3 to 29.0 FA142869X12 Orange Stripe
1050 to 1570 15.2 to 22.8 GF02171X012 Pink
1250 to 2300 18.1 to 33.4 GF02172X012 Green
500 to 2800 7.3 to 40.6 T14171T0012 Olive 2100 to 3750 30.5 to 54.4 GF02173X012 Silver
-
Not available for North America.
VSX4 and VSX8 Series
4