Bray 92_93 Series FLO User Manual

Page 6

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

Mounting the Actuator to the Valve

The actuator is attached to the valve by means of

the mounting kit. Thread the studs into the proper

holes in the actuator, before installing the actua-

tor on the valve. The studs should be snug in the

bottom of the tapped holes; there is no need to

torque them. Install the actuator on the valve or

mounting bracket making sure that the base of the

actuator fits flat against the mounting flange. Use

the nuts and washers from the kit to complete the

installation. Torque the nuts in a diagonal pattern

to assure equal loading of the studs.

Setting the Travel Stops

The final step in the installation process is to check

the travel stop settings. The travel stops are set for

90° of travel at the factory; however, each installation

is different so they should be checked before putting

the valve in service. The actuators are designed

with a nominal 5° over or under travel at each end

of rotation. A screwdriver, an open end or box end

wrench and a hex wrench, all of the appropriate size,

are the only tools required to make the necessary

adjustments. Refer to Figure 1 below.

WARNING

Before setting the travel stops, the pneumatic air

supply must be completely disconnected from the

actuator, and all compressed air stored within the

actuator must be released. Auxiliary devices con-

nected 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.

Remove the black position pointer to expose the

wrench flats on the top of the pinion.
Rotate the valve to the desired position using a

wrench on the pinion.
Loosen the lock nut on the travel stop screw. It is

not necessary to remove the nut completely. Us-

ing the hex wrench, turn the screw in or out until

the desired travel stop position is reached. While

holding the screw with the hex wrench, tighten the

lock nut with the wrench.
Replace the position indicator making certain the

pointer is aligned with the position of the valve,

open or closed.
Replace the position indicator making certain the

pointer is aligned with the position of the valve,

open or closed.

5°

Figure 1