Product Overview

All information herein is proprietary, 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.
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Rev. 8_2017
bray.com
SERIES 70 ELECTRIC ACTUATORS
Recommended Specifications
General
• The actuator shall be compact and low profile to
minimize space requirements.
• The actuator shall provide adjustable operation up to
90°.
• The actuator shall provide easy access for field wiring
and adjustment.
• The actuator shall be built to withstand line vibration
and shock without failure.
Enclosure - Weatherproof
• The enclosure shall be die-cast aluminum.
• The enclosure shall be polyester or Seacorr coated (as
specified) for environmental protection.
• The enclosure shall be provided with captive cover bolts
to prevent loss of cover bolts when cover is removed.
• The enclosure shall have two conduit connections (one
for power wiring and one for control signal wiring) in
either NPT or metric threads as specified.
• The actuator enclosure shall be provided with a high
visibility valve position display prominently labeled and
color coded to indicate the valve position throughout
the full range of travel.
Motor
• The motor shall be a single phase, permanent split
capacitor induction type with Class F or better
insulation.
• The motor shall contain a built-in UL approved
automatic reset thermal overload protector set at 275ºF
(135ºC) embedded in the motor windings.
• Motors shall be 120 VAC or 220 VAC (230 VAC
compatible) 50/60 Hz as specified.
• Other DC and AC motors shall be available upon
request.
Actuator Gear Train System
• The actuator shall have a self-locking gear train system
consisting of a worm and worm gear output drive
mechanism, which will hold the valve in the desired
position without the need for an electro-mechanical
braking system.
• The spur gear train shall have precision cut multi-
staged gears which will withstand locked rotor
conditions and are permanently lubricated at the
factory.
• The actuator shall have an Oldham coupler to correct
any misalignment between the output gear and the
cam shaft.
Mechanical Travel Stops
• Mechanical stainless steel travel stops shall be provided
and located outside the actuator enclosure for ease of
adjustment.
• Stainless steel lock nuts shall be provided to hold the
travel stops in position.
• O-ring seals for waterproof protection shall be
provided.
• The mechanical travel stops shall limit the travel of the
actuator in either direction to the full travel range of
the valve.
• Stainless steel spacers shall be provided to prevent
adjustment of travel stops above 0° and below 90°.
Manual Override
• The actuator shall be equipped with a manual override
handwheel to rotate the valve without electrical power.
• The manual override system shall ensure efficient
manual operation without the use of extra tools or
levers.
• A motor power cutout switch shall be provided to cut
power to the motor when the actuator manual override
is engaged.