Series 70-HAZ hazardous location electric actuator product image
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Electric Actuator Series 70-HAZ

Bray Series 70-HAZ hazardous location electric actuator, output torque 800 to 2,000 in-lb, UL certified, for valve automation in hazardous areas

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Product Overview

Designed with hazardous location ratings and self-locking worm gear for reliable valve control

Compact actuator base integrates motor, gear drive and heater - no customer maintenance required

Power Center
Bray designed the 70 Hazardous series with the control center completely separate from the power center. The power center is located in the actuator base and consists of the motor, gear set, capacitor, output drive, and heater. Each component is designed to be maintenance-free for the customer, thus this design protects the power drive system. The power center components are uniquely configured to maintain the extremely low profile of the 70 series.
Self-Locking Output Drive Assembly
The output drive assembly features a self-locking worm and worm gear drive that holds the valve in the desired position without requiring an electric/mechanical braking system. The worm shaft directly drives the worm gear.
Mechanical Travel Stops
Stainless steel mechanical travel stops are field-adjustable to prevent over-travel when using the manual override. The travel stops are located outside the base and are easy to adjust without removing the cover. Stainless steel lock nuts with O-ring stem packing securely hold the travel stops in place. Travel stops are typically set at the factory, allowing travel between 0° and 90°.
Manual Override Handwheel Assembly
Pull to engage manual operation.
Rotate the handwheel to position the valve.
Push to return to electric operation.
The Bray manual override system ensures accurate and rapid manual operation without requiring additional tools or levers. An automatic power disconnect switch cuts motor power when the handwheel is in use. A ball detent holds the manual override shaft in position when in use. When the handwheel is pushed in to disengage the override, the ball detent also holds the shaft in position. Drive pins engage and disengage from the worm and segmented worm gear output shaft with the manual override shaft. When pushing or pulling the handwheel, the drive pins engage smoothly with the worm shaft.

Technical Specifications

ItemParameter
Output Torque800 to 2,000 in-lb (90-226 Nm)
Control OptionsIRB
Voltage120 VAC
Power Source120 VAC
Enclosure ProtectionClass I, Divisions 1 and 2, Groups C, D
Class II, Divisions 1 and 2, Groups E, F, G
Input Signal120 VAC
Communication ProtocolNone
MountingISO 5211
Motor120 VAC: Single-phase, reversible, permanent split capacitor motor
Temperature Range-20°F to 150°F (-29°C to 65°C)
Switch OptionsUp to 5 x SPDT
CertificationsHazardous location (120V only) UL certified (US and Canadian standards)
Switch QuantityStandard 2, maximum 5
Valve CompatibilityQuarter-turn valves
ApplicationHazardous locations

FAQ

What valves and environments is the Series 70-HAZ suitable for?

The Series 70-HAZ is designed for quarter-turn valves in hazardous locations. Its hazardous location ratings include Class I, Divisions 1 and 2, Groups C, D, and Class II, Divisions 1 and 2, Groups E, F, G. The hazardous location UL certification applies only to 120 VAC versions and complies with US and Canadian standards.

How do I select the right Series 70-HAZ torque for my valve?

Selection should be based on the valve's actual operating torque, mounting interface, and application temperature conditions. The Series 70-HAZ output torque ranges from 800 to 2,000 in-lb (90 to 226 Nm), uses ISO 5211 mounting, and has an ambient temperature range of -29°C to 65°C. Specific configuration depends on the actual model and application conditions.

What is the function of the self-locking worm drive in the Series 70-HAZ?

The series uses a self-locking worm and worm gear output drive that holds the valve in the desired position without requiring additional electric or mechanical braking systems. The worm shaft directly drives the worm gear, providing stable mechanical self-locking capability for valve position holding.

How is manual override performed on the Series 70-HAZ during power loss or when field operation is needed?

For manual operation, pull the handwheel to engage the manual override. Rotate the handwheel to position the valve. Push the handwheel back to return to electric operation. An automatic power disconnect switch cuts motor power when the manual override is engaged, preventing simultaneous manual and electric drive.

How are the mechanical travel stops adjusted, and is actuator disassembly required?

The Series 70-HAZ features externally mounted stainless steel mechanical travel stops that are field-adjustable without removing the cover. These stops prevent over-travel during manual override and are typically factory-set for 0° and 90° travel. After adjustment, they can be secured using stainless steel lock nuts with O-ring stem packing.

Documents

Brochure - Actuators & ControlsProduct information · EnglishBrochure - Valve Automation Center (VAC)Product information · EnglishQuick Start Guide - Series 70 Electric ActuatorProduct information · EnglishRecommended Specification - Series 70 Electric ActuatorProduct information · English

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