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
Travel Limit Switches
• Travel limit switches shall limit the actuator travel in
both the open and closed direction of travel.
• Travel limit switches shall be held in brackets for
accurate and repeatable valve position feedback.
• Travel limit switch cams shall be infinitely adjustable by
finger touch or screw driver.
• All travel limit switches shall be:
• Single Pole Double Throw (SPDT) Form C, UL Listed,
and CSA Approved.
• 10A at 125/250 VAC and 1/2A at 125 VDC.
• Travel limit switches shall be pre-wired to a terminal
block for ease of access and all internal wiring shall
range from 12-22 AWG.
Service Requirements
• Actuators shall be designed for electric operation under
the following service conditions:
• Temperature range:
• -20ºF to 150°F (-29ºC to 65º)
• Duty Cycle:
• 25% for Intermittent Operation
• 100% for Continuous Operation
Testing
• All actuators shall be factory tested at rated load to
ensure proper operation.
Mounting
• All actuators shall comply with ISO 5211 and mount
directly to the valve mounting flange and stem without
the need for any brackets or couplings.
Optional Equipment
The actuator shall be designed to accept the following
optional accessories if specified:
Torque Limiting System
Limits torque output during electrical operation.
• Shall include two SPDT mechanical switches and two
factory-calibrated adjusting screws.
• The switches, in response to a predetermined load on
the actuator output shaft, shall interrupt power to the
motor.
• The switches shall operate at any point and in both
directions of actuator travel.
Heater
Prevents internal condensation build-up.
• Shall be a self-regulating temperature control type.
• Shall be pre-wired to the terminal block for ease of
connection to external source.
• Rated output shall be 5 W at 120 or 220 VAC.
Local Control Station
Permits local electrical operation of the actuator.
• Shall flush mount to the actuator and include:
• A local-off-remote control switch.
• An open-stop-close switch.
• Two lights which indicate open and closed valve
position.
• Two ¾” NPT conduit entries in base of enclosure
for customer wiring.
• Enclosure shall be aluminum and weatherproof.
Battery Back Up
User-selectable valve fail position upon loss of power supply
in 24V applications.
• Shall flush mount to the actuator and include:
• Visual and remote indication of battery status and
operation.
• Field selectable valve fail position.
• Two ¾” NPT conduit entries in base of enclosure
for customer wiring.
• Enclosure shall be aluminum and weatherproof.
Potentiometer
Provides continuous feedback of valve position.
• Shall be a gear driven 10k Ohm potentiometer.
• Shall be standard for units with Servo NXT controller.
Auxiliary Switches
Indicates travel position for remote customer control
systems.
• All auxiliary switches shall be:
• Single Pole Double Throw (SPDT) Form C, UL Listed,
and CSA Approved.
• 10A at 125/250 VAC and 1/2A at 125 VDC
• Up to 6 additional auxiliary switches may be added.