Instruction Manual
D100291X012
480 Series Actuators
August 2012
6
When 480 Series actuators are supplied to operate dampers, louvers, or similar equipment, a suitable mounting plate
should be provided, and the piston rod of the actuator connected to the operating arm of the damper, etc., with
appropriate linkage.
Figure 5. Cylinder Diameter and Bolt Center Location, All Actuators (refer to table 5)
BH9452-K
A1290
Table 5. Cylinder Diameter and Bolt Center Location, All Actuators
ACTUATOR SIZE
C
H, DEGREE OF ARC
mm
Inch
Standard Flange
Universal Mounting Flange
30
171
6.75
0
45
40
206
8.12
45
45
60
267
10.50
22.5
45
Figure 6. Operation of Actuator with Snubber
32A8303-A
A1287
SNUBBER
POSITIONER
OR SWITCH
-ING DEVICE
SUPPLY PRESSURE
TOP CYLINDER PRESSURE
BOTTOM CYLINDER PRESSURE
UPPER SNUBBER PRESSURE
LOWER SNUBBER PRESSURE
CHECK
VALVES
Principle of Operation
Actuator
These actuators react to a pressure unbalance that is created by loading supply pressure on one side of the piston and
unloading the opposite side. Some type of switching device is required to shift the supply pressure from one side of
