Electric Actuators & Accessories 1

Electric Actuators Series 70 Torque Output S70 - Explosion Proof Models Series 70 Sizes 130-181 Torque Output Butterfly Valve Summary: Pgs 14-15

Product Quality & precision Through years of field application experience, research and development, we have designed products that meet the stringent requirements of today’s process industries. Bray has earned a reputation of excellence by creating products of superior value and quality, providing personalized customer service and on-time deliveries. Our success has always been the direct result of our fully integrated, full range butterfly valve and control product lines. Rugged and reliable, our products are engineered to provide years of trouble free service. Assuring product quality, precision...

TRAVEL 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...

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. 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 wiring diagram is included inside the cover for easy reference. The ground wire screw is plated green and positioned for easy access. O-RING SEAL FOR WATERTIGHT ENCLOSURE: The large seal...

Bray SERIES 70 POWER CENTER Bray designed the Series 70 to completely separate the Control Center from the Power Center. The Power Center, located in the actuator base, consists of motor, gear train, capacitor, output drive and heater. This design protects the power drive system as each component has been engineered to require no customer servicing. The Power Center components have been uniquely configured to maintain the extremely low profile of the Series 70. SELF-LOCKING OUTPUT DRIVE ASSEMBLY: The output drive assembly features a self-locking worm and worm gear drive which holds the valve...

ONE PIECE WORM GEAR, DRIVE SHAFT The drive shaft is the driving member that positions the valve.The worm gear drives the valve status display shaft which operates the infinitely adjustable cams to limit the electrical travel of the actuator. WORM SHAFT MOTOR: 115 or 220 VAC single phase permanent split-capacitor reversible induction motor The motor features a built-in thermal overload protector of a bi-metallic strip in the windings set at 275°F (135°C) with automatic reset. DISC SPRINGS GEAR TRAIN: The heavy-duty spur gear train is composed of precision cut, multi-staged gears and shafts. The...

VOLTAGE SPIKE PROTECTION: Voltage spikes that can damage electrical equipment are very common in industrial locations. Large voltage spikes can be caused by switching power loads, such as large motor drives, at the customer location. The output stage triacs of the Servo Pro are protected against damage from voltage spikes by a special combination of: Modulating actuator - servo pro For precision control of valve position. The Bray Series 70 Electric Actuator can be equipped with a Servo for precise control of valve position. The Servo consists of a microprocessor controlled circuit board and...

SERVO PRO OPERATION: The Servo Pro can be configured by the factory or the customer to accept several types of input signals, such as 4-20 mADC, 0-10 VDC, 0-5 VDC or potentiometer control. Each terminal connection and indicator is clearly labeled to simplify field wiring and operation. The input signal electronically represents the desired actuator position, and the internal feedback potentiometer signal electronically represents the actual actuator position. The microprocessor constantly compares the two signals, and if a difference is detected, drives the actuator in the proper direction until...

The conduit entry panel has four holes which may be easily tapped for the installation of optional local Control Station. CONTROL STATION: The conduit entry panel has four holes which may be easily tapped for the installation of optional local Control Station. The Control Station features a local–off–remote control switch, an open–stop–close switch, and two lights which locally indicate open and closed valve position. The cover plate can be rotated in any 90° increment, allowing the customer to operate and view the station with ease. The enclosure is aluminum and weatherproof (NEMA 4, 4X, IP...

Torque Limit Switches shown with mounting bracket sectioned for clarity. MECHANICAL TORQUE LIMITING SYSTEM - optional The mechanical torque limiting system consists of a Worm Shaft, a Worm, a set of Torque Disc Springs and a Shaft Groove for torque limiting switches. The torque disc springs, located on each side of the worm, resist the linear movement of the worm shaft. The worm shaft is driven against the torque disc springs in response to output torque. The shaft groove actuates the torque limiting switches, located above in the Control Center, to start and stop the motor. Two SPDT mechanical...

RUGGED, LOW COST electric actuators FOR ROTARY VALVES Three on-off models with up to 600 lb-in (68 N-m) Output torque Bray Controls’ generations of innovative electric actuators have a proven record of success. Building on this record, Bray has combined engineering expertise and years of field experience to produce the Series 73. This electric actuator for rotary valves delivers highly reliable service at a reduced price. The Series 73 meets the needs of 21st Century industrial applications at a price that is unmatched. The Bray Series 73 Electric Actuator on Bray butterfly valve and Flow-Tek...