Bray 92 Series User Manual

5
All information herein is proprietary and condential 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
travel stop position is reached. While holding the screw
with the hex wrench, tighten the Lock Nut (12) with the
box end wrench.
Replace the Position Indicator Pointer (23) making
certain the pointer is aligned with the position of the
valve, open or closed.
Some valves or operating conditions require that the
actuator have more than 5° of travel adjustment. For
these conditions, the Series 92/93 actuator can be tted
with extended travel stops in the end caps. (See page 10
for instructions on nding dimensional data) Consult
the Bray distributor in your area for this option.
Spring return actuators may be operated with only one air
supply connected to Port A, since the spring cartridges
will move the pistons when the air pressure in removed.
This operation, however, will draw the surrounding
atmosphere into the spring chambers through Port B.
NOTICE
To prevent contamination from entering the spring
chamber, actuators congured to operate with only one
air supply connected to Port A should be equipped with
a 40 micron (or ner) lter element installed in Port B.
Even better service may be obtained on spring return
actuators by installing a four-way solenoid, covering
both Port A and Port B. A four-way solenoid will ll the
spring chambers with compressed air from the plant air
supply with each stroke. The plant air supply is often
cleaner than the surrounding atmosphere, especially in
heavy industrial or chemical areas.
Maintenance
The rugged components and factory lubrication combine
to ensure a long and trouble-free service life for Series
92/93 actuators. Dirt, rust and water are the most com-
mon causes for shortened service life, and they typically
enter the actuator through the air supply line.
NOTICE
To lengthen service life, it is strongly recom-
mended that an adequately sized lter with a 40
micron (or ner) element be installed adjacent
to the inlet of the directional control (solenoid
air) valve. Air lubricators are recommended for
rapid cycling applications (10 cycles or more
per minute.)
Routine maintenance of Series 92/93 actuators
consists primarily of maintaining the air supply
system by changing lter elements before they
start by-passing, adding oil to lubricators before
they run dry, and preventing water from entering
the air lines.
The second most common cause of shortened service
life is misalignment between the valve and the actua-
tor. This can cause premature failure due to excessive
side loads on the bearings and gear teeth.
NOTICE
To lengthen service life, the mechanical connec-
tion between the actuator and the valve should be
veried to be properly aligned and free to rotate
throughout the full range of valve travel.

Bray 92 Series Specifications

General

Output	Relay
Control Mode	PID, On/Off
Power Supply	100-240V AC
Input Voltage	24V AC/DC, 100-240V AC
Output Current	4-20mA
Protection Class	IP65