Output Torque 300 in-lb (34 Nm) to 18,000 in-lb (2,034 Nm)
Bray Controls’ years of proven success in electric actuation, combined with innovative engineering, has produced the Series 70 electric actuator. The Series 70 features on/off or modulating control.
Bray’s Series 70 electric actuator has many advantages over other actuators including:
Designed like a junction box, the Series 70 offers by far the easiest access to terminal block wiring, cam adjustments and switch installation. Therefore, the time required for field startup and adjustment is greatly reduced, and maintenance can be performed with assured ease and safety.
ravel Limit SPDT Switches
Bray has provided two SPDT mechanical switches as standard. These durable, high quality switches are mechanically isolated and electrically independent. The dedicated circuits eliminate any voltage crossover between the switches. This switch combination is used for both open and closed positions of the valve and requires only one cam for each direction of valve travel. Bray’s design provides synchronicity between motor control and position display. Switches are easily accessible without interference from other components. Each switch is marked with open or close labels and the cams are color coded, green for open and red for close, eliminating the possibility of incorrect wiring
Bray’s patented cam design is an outstanding feature of the Series 70. Cams for each switch are infinitely adjustable by finger touch or screwdriver with no special tools needed. The adjustment knobs rotate the specially formed cams. Each cam is color coded – the red adjustment knob controls the red cam (close position), and the green knob controls the green cam (open position). Standard factory setting allows 90° travel between open and closed positions.
Two connections in either NPT or metric threads. One entry is for power, the other for control wiring.
The Series 70 optional waterproof/ explosion proof unit is UL NEMA 4,4x listed and certified to specifications for USA & Canadian hazardous locations Class-I C&D Div 1&2; Class-II GRPS EF&G Div 1&2. The rugged, heavy duty housing contains precision machined bores and flanges to meet flame path requirements. Waterproof/Explosion proof models are currently available with 800 to 2,000 in-lb. output torque, continuous or intermittent duty.
[A] TERMINAL BLOCK: The actuator switches are pre-wired to an easily accessible terminal block. Terminals are clearly identified for customer wiring. The block has been placed near the two conduit entries with ample room for running wire leads. A wir- ing diagram is included inside the cover for easy reference. The ground wire screw is plated green and positioned for easy access.
[B] VALVE STATUS DISPLAY: Prominently labeled and color coded – yellow for open, red for closed – the display indicates valve position through the full range of travel. The display can be seen from almost any angle. Made of high impact, heat and chemical resistant clear polycarbonate, this display withstands caustic wash down and offers excellent corrosion protection. Potential leak paths are eliminated since the indicator cover utilizes a static seal, not a dynamic seal.
[C] INTERPOSING RELAY: The time delay provided by the Interposing Relay will protect the switches and gears from the controller’s instantaneous command signal reversal. This feature also allows for parallel wiring of multiple actuators.
[D] MANUAL OVERRIDE: A manual override handwheel is standard on all models to rotate the valve without electrical power. A yellow caution stripe around the handwheel hub becomes visible when the handwheel is engaged for manual operation.
[E] AUTOMATIC POWER CUTOUT SWITCH: The Series 70 is supplied with a SPDT mechanical switch which cuts power to the motor when the handwheel is engaged for manual operation.
[F] O-RING SEAL FOR WATERTIGHT ENCLOSURE: The large seal between the cover and base provides a waterproof seal and prevents internal corrosion. The Bray Series 70 O-ring seal is a far superior design to commonly used gaskets.
[G] ENCLOSURE: The Series 70 waterproof unit is UL NEMA 4, 4x listed. Die-cast aluminum cover and base are high-quality polyester powder coated for exceptional corrosion, wear, impact and ultra-violet resistance.
[H] CAPTIVE COVER BOLTS: The cover is attached to the base by stainless steel bolts. When the cover is removed the bolts are held captive in the cover. This prevents time consuming problems caused from lost or misplaced bolts.