Installation; Mounting And Orientation - GE Masoneilan 4700P Maintenance Manual

Installation

Mounting and Orientation

The valve is installed in the pipeline to operate in one of two ways:
Air to Open
Close on air failure
(Reverse Action)
The choice depends on the desired air failure action. This subject is dealt with in separate actu-
ator instructions. The positioner can operate either by direct action (increasing instrument signal
produces an increase in output pressure) or reverse action (increasing instrument signal produc-
es a decrease in output pressure). See Figure 3 and Figure 4.
NOTE
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Air to Close
Open on air failure
(Direct Action)
The 4700E/4800E is not available with reverse action, hence
if the application demands reverse action, a 4700P/4800P
with an external I/P Transducer is required.
.
Masoneilan 4700P/E & 4800P/E Positioners Manual =| 19