
33
Reference Manual
00809-0100-4001, Rev JA
Section 2: Installation
November 2012
Installation
Five-valve Natural Gas configurations shown:
Note
Do not open the low side equalize valve before the high side equalize valve. Doing so will
overpressure the transmitter.
Drain/
Vent
Valve
Drain/
Vent Valve
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
4. Open the block valve on the
low pressure side of the
transmitter to return the
transmitter to service.
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
In normal operation, the two block
valves between the process and
instrument ports will be open, and the
equalizing valves will be closed.
Process
Equalize
(closed)
Drain
Vent
(closed)
Test (Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
1. To zero the 3051, first close
the block valve on the low
pressure (downstream) side
of the transmitter.
Process
Equalize
(closed)
Drain Vent
(closed)
Komentarze do niniejszej Instrukcji