Bray 92_93 Series FLO - Manual (Page 5)

3 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
Fail Open Method 1 – Mounting the Actuator
Perpendicular to the Pipeline
NOTICE
Fail Open Method 1 – Mounting the Actuator
Perpendicular to the Pipeline – works only with
valves that allow the ball to be swung through
the seat.
Turn the actuator so the long side is perpendicular
to the pipeline. This will allow the spring cartridges
to rotate the valve stem clockwise to open, and the
air stroke to rotate the valve stem counterclockwise
to close. This is the easiest method if there is suf-
ficient room to mount the actuator.
Fail Open Method 2 – Rotating the Pinion
NOTICE
Fail Open Method 2 – Rotating the Pinion - works
only with valves that allow the ball to be swung
through the seat.
See Assembly (Page 6) for detailed instructions on
reinstalling the travel stop cam on the pinion.
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.
WARNING
Some actuators may have spring cartridges installed.
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.
Remove the end caps, spring cartridges and pistons
from the actuator. Remove the pinion, rotate it
90°, and reinstall the pinion in the actuator. This
will also allow the spring cartridges to rotate the
valve stem clockwise to open, and the air stroke to
rotate the valve stem counter-clockwise to close.
This is the second easiest method, and allows the
actuator to be mounted with its long side parallel
to the pipeline.
Fail Open Method 3 – Reversing the Pistons
NOTICE
Fail Open Method 3 – Reversing the Pistons –
works for all valves, where the ball may only turn
clockwise to close.
See Assembly (Page 6) for detailed instructions on
reinstalling the travel stop cam on the pinion.
Remove the end caps, spring cartridges and pistons
from the actuator. Rotate the pistons so that the racks
turn the pinion counterclockwise as the pistons move
toward each other. (With the air input ports of the
actuator body facing you, the left hand piston rack
should be on the side with the air ports.) This is the
third easiest method, and allows the actuator to be
mounted with its long side parallel to the pipeline,
and clockwise to close rotation to be maintained.
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