V&A cashco C27 Installation, Operation & Maintenance Manual

ISO Registered Company
SPRING/DIAPHRAGM LINEAR PNEUMATIC ACTUATORS
I. DESCRIPTION AND SCOPE
Actuator models C27 and C53 are multi-spring,
single acting, spring opposed, linear actuators used
with Cashco sliding stem (linear), globe-style control
valves. The "R" denotes" reverse"acting arrangement;
the "D" denotes "direct" acting arrangement and are
reversible in the field.
"D" = Direct action; on increasing air loading
pressure,the actuator stem extends. Fail-safe position
is with the stem retracted.
"R" = Reverse action; on increasing air loading
pressure, the actuator stem retracts. Fail-safe
position is with the stem extended.
When coupled with a globe-style control valve with
pushdown to close action, a "D"- direct acting actuator
will provide valve "fail open" action;"D" = ATC-FO.
When coupled with an "R" - reverse acting actuator,
will provide valve "fail closed" action; "R" = ATO-FC.
II. REFERENCES
Refer to the Control Valve Technical Bulletin this
actuator is unitized with for complete tech ni cal
specifications.
Refer to following Installation, Operation & Main te-
nance Manuals (IOM's) for other devices that maybe
mounted to C27-C53 actuators:
Positioners: P/P: P5 or I/P: D20 or D3 go to
http://www.pmv.nu/products.aspx?pathlocator
PS2 I/P: http://www.automation.siemens.com/sc-
static/catalogs/catalog/pi/fi01/en/fi01_en_kap05.pdf
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
MODELS C27 - C53
SECTION I
SECTION II
Shown w/ATO-FC Action
ABBREVIATIONS
ATO-FC ..... Air-to-Open, Fail Close
ATC-FO ..... Air-to-Close, Fail Open
CCW .......... Counter Clockwise
CW ............. Clockwise
D or DIR ..... Direct Acting
R or REV.. Reverse Acting
IAS ............. Instrument Air Supply
SIG ............ Output Signal from Instrument
LOAD ......... Positioner Output Air Pressure
V ................ Vent
IOM-C27-C53
02-16