Cashco 9540R P/P - Manual

I. DESCRIPTION AND SCOPE
Model 9540R is a single acting, compact, force-bal-
ance, pneumatic positioner used together with a
rotary motion adapter baseplate for 90
°
rotary control
valves. This positioner is utilized to characterize the
relationship between valve stem position and the
system’s control signal. This design is only suitable for
nominal 3-15 psig (.21-1.0 Barg) input signals, or split
range variations thereof.
Each unit comes complete with a set of built-in gauges
within the internals, and a visual stem position indica-
tor; the cover includes a clear see-thru panel to
monitor gauges. Gauges monitor input “SIG” and
output “LOAD”.
The Model 9540R P/P positioner may be utilized as an
alternate to the standard Model 9000R rotary P/P
positioner, with the following current Cashco product
models:
Ranger QCT
Premier EZO
Premier (unlined)
IAS – Instrument Air Supply
PC – Pressure Controller
PCV – Pressure Control Valve
ATO-FC – Air-to-Open, Fail Close
ATC-FO – Air-to-Close, Fail Open
P/P – Pneumatic Input/Pneumatic Output
DIR – Direct Acting
REV– Reverse Acting
SIG – Controller Output Signal
V – Vent
CW – Clockwise Rotation
CCW – Counter-Clockwise Rotation
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM) IOM-9540R
06-03
MODEL 9540R
P/P - PNEUMATIC POSITIONER FOR ROTARY VALVES
SECTION I
Figure 1: Typical Pressure Reducing Pneumatic
Control Loop – PCV with P/P Positioner
Model 9540R Mounted on a
Cashco Ranger QCT Control Valve
PCV
5-13 psig
3-15 psig
LOAD
DIR.
P1 = 500 psig ATO-FC
IAS
P/P
SIG
PROCESS
P2 = 100 psig
15-3 psig
IAS
20 psig
REV.
PC