Bray 92_93 Series FLO - Manual (Page 10)

8 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
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 warn-
ing 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
movement of the springs to the relaxed position.
If the actuator is installed on a valve, remove the actuator
from the valve, and move the actuator to a clean work
area. Remove the indicator pointer. Remove both end
caps by loosening the hex head end cap bolts. Remove
both pistons by rotating the pinion counterclockwise until
the piston heads are protruding from the body. Pull the
pistons out. Using snap-ring pliers, remove the pinion
retaining ring and acetal washer, then remove the pinion
from the body. The pinion bearings, o-rings, cam and
spacer may then be removed.
Adding Spring Cartridges
WARNING
Before disassembly of the actuator, the pneumatic air sup-
ply 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.
Move the pinion to the fully closed (0°) position.
Remove the end caps and insert the desired number
of spring cartridges into the end cap pockets, up to
a maximum of six cartridges per end cap.
NOTICE
For proper operation, actuators equipped with Spring
Cartridges should have the spring cartridges installed in
accordance with the positions shown in figure 2.
Align the end cap with the body so the spring car-
tridges fit into the piston pockets. Attach the end caps
to the body with the hex head end cap bolts. Tighten
the bolts gradually in a diagonal sequence.
Proceed to Final Assembly and Testing.
RACK BEHIND PISTON
XX = SIZE CODE
2 SPRINGS
EACH PISTON
3 SPRINGS
EACH PISTON
4 SPRINGS
EACH PISTON
5 SPRINGS
EACH PISTON
6 SPRINGS
EACH PISTON
!
!
Figure 2