Bray 92_93 Series FLO - Manual (Page 11)

9 All information herein is proprietary and confidential and may not be copied or reproduced without the expressed written consent of BRAY INTERNATIONAL, Inc.
The technical data herein is for general information only. Product suitability should be based solely upon customer’s detailed knowledge and experience with their application.
Series 92-93 Pneumatic Actuator
Operations and Maintenance Instructions
Removing Spring Cartridges
WARNING
Before disassembly of the actuator, the pneumatic
air supply must be completely disconnected from
the actuator, and all compressed air stored within
the actuator must be released. Auxiliary devices
connected to the actuator, such as tubing, ball
valves, solenoid air valves, valve positioners, etc.
can block the release of air from within the actuator.
Do not rely upon the features or controls of any
auxiliary device to release the air from inside the
actuator and render it safe for disassembly.
CAUTION
Before disassembly, all spring cartridges must be
placed into the relaxed (fully extended) position.
All compressed air must be removed from inside
the actuator (See warning above) and the actuator
pinion must be allowed to rotate so the springs may
be relaxed. Care must be taken to verify that any
device connected to the actuator, such as a valve
mounted underneath, is not preventing the move-
ment of the springs to the relaxed position.
An actuator with spring cartridges installed and no
compressed air connected will move to the spring
fail position if the pinion is free to rotate. This may
be either fully closed (0°) or fully open (90°). In
either case, when the spring fail position is reached,
remove the end caps by gradually loosening the hex
head end cap bolts in a diagonal sequence.
CAUTION
When removing end caps from an actuator con-
taining spring cartridges, the end cap bolts must
be loosened gradually in a diagonal sequence until
the spring cartridges are completely relaxed (fully
extended.) The spring cartridges should reach the
completely relaxed (fully extended) position while
all four end cap bolts still have some thread en-
gagement with the actuator body. Do not remove
three end cap bolts completely from the body and
expect the remaining single bolt to hold the spring
cartridges in a compressed position.
Remove the spring cartridges. Replace the end
caps and tighten the end cap bolts gradually in a
diagonal sequence.
CAUTION
When replacing end caps onto an actuator contain-
ing spring cartridges, the end cap bolts must be
tightened gradually in a diagonal sequence until the
spring cartridges are slightly compressed into their
fail position. The spring cartridges should reach the
slightly compressed fail position while all four end
cap bolts have some thread engagement with the
actuator body. Do not attempt to tighten a single end
cap bolt fully and compress the spring cartridges
while the other three bolts have not been installed.
Proceed to Final Assembly and Testing.
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