Emerson Rosemount 2051 Reference Manual page 52

Hardware Installation
September 2020
Next, open the center (equalize) valve(s) to equalize the pressure on both sides of the
transmitter.
The manifold valves are now in the proper configuration for zeroing the transmitter. To
return the transmitter to service, close the equalizing valve(s) first.
Next, open the isolate valve on the low pressure side of the transmitter.
Five-valve Natural Gas configurations shown:
In normal operation, the two block valves between the process and instrument ports will
be open, and the equalizing valves will be closed.
52
H
Drain/Vent
valve
Equalize
(closed)
Isolate
(open)
Process
H
Drain/Vent
valve
Equalize
(open)
Isolate
(open)
Process
H
Drain/Vent
valve
Equalize
(closed)
Isolate
(open)
Process
H
Drain/Vent
valve
Equalize
(closed)
Isolate
(open)
Process
Reference Manual
00809-0100-4107
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(open)
Rosemount 2051 Pressure Transmitter