I. DESCRIPTION AND SCOPE
Models 48D and 48R are multi-spring, single act ing,
spring opposed, rotary ac tu a tors used with Cash co
rotary control valves. Regardless of
fi
nal installed
fail ure action, the ac tu a tor is always pres sur ized on
“top” of the traveling diaphragm plate.
Cashco has adopted a convention as follows in iden ti -
fy ing its rotary actuators:
“D” = Direct Action = ATC-FO Action
“R” = Reverse Action = ATO-FC Action
The Model 48 actuator is
fi
eld re vers ible by ar range -
ment of actuator with respect to valve stem and valve
plug/disc orientation. Some dis as sem bly is re quired,
but no new parts are re quired.
Reference the technical bulletin of the valve body these
actuators are unitized with for operating/in stal la tion/
se lec tion speci
fi
cations; i.e. available bench settings,
strokes, etc.
MODEL 48
SPRING/DIAPHRAGM ROTARY ACTUATORS
INSTALLATION, OPERATION & MAINTENANCE MANUAL (IOM)
IOM-48
12-13
SECTION I
Figure 1
Model 48 Actuator
SECTION II
4 8 R - 0 1
Basic Model No.
48 in
2
size
Reverse Action
(ATO-FC)
Modi
fi
er
Valve Modi
fi
er
Product
Series
No.
Ranger QCT
-00 through -09
Premier EZO
-00 through -09
Premier Unlined
-00 through -09
II. MODEL NUMBERING
The basic Model Number identi
fi
es the actuator size and action. To identify a unique Model Number, an oth er series
of 2-character modi
fi
ers is added to the basic number. This number will identify which basic valve body the actuator
may be used on. See Table 1.
TABLE 1
