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| Group 29 Linear Valve Actuators A versatile, compact design, advanced HART®-capable electronics, hazardous location ratings, and Beck reliability all highlight the new Group 29 linear valve actuator.
Beck’s all-new Group 29 linear valve actuator improves upon the time-honored Group 14 product line. It is designed to provide precise, reliable control of all types of modulating globe valves. The Group 29 linear valve actuator offers the excellent performance and maintenance-free design typical of all Beck drives, as well as the flexibility and advanced features provided by microprocessor-based electronics. Ideally suited for process control applications in even the harshest environments, the Group 29 linear valve actuator handles valve thrust requirements up to 6,100 lbs. and is easily mounted on most valves. A ball screw design along with an advanced drive control algorithm and the traditional Beck motor design ensure repeatable modulation as precise as 0.1% of span. A new, lighter, more compact design makes installation simple, while the rugged, weatherproof body rated for hazardous locations ensures safe operation anywhere in a plant environment. Click on any of the the Group 29 Photos for a closer view General Specifications; Drive Power Options (all Group 29 models) 120 Vac, single-phase, 50 or 60 Hz | 240 Vac, single-phase, 50 or 60 Hz |
Additional Specifications Weight
(including yoke) | 29-100 - Approximately 94 lbs. Approximately 43kg | 29-250 - Approximately 145 lbs. Approximately 66kg | 29-600 - Approximately 181 lbs. Approximately 82kg | | Operating Conditions | –40° to 85° C. (–40° to 185° F.)
0 to 99% relative humidity | | Communications Interface | HART© protocol and local pushbutton/LED panel and RS-232 serial commands | Demand Input Signal
Range | 4–20 mA, 1–5 V dc | | Minimum Step | 0.1° of span | | Hysteresis | 0.25% of span at any point | Demand Input Signal
Characterization | Linear: Drive output shaft moves proportionally to the input signal.
Square: Drive output shaft moves proportionally to the square of the input signal.
Custom: 20 segment configurable curve fit | Position Feedback
Signal | 4-20 mA, 1-5 V dc | | Isolation | Demand input and position Feedback signals are isolated from ground and the ac power line. Signal buffering provides 24 V dc isolation between the Demand and Feedback signals. | Action on Loss of
Power | Output shaft stays in last position | | Action on Loss of Input Signal (Power on) | Stay in place or runs to any preset position (configurable) | | Over-thrust Protection | If the output thrust of the drive exceeds 115% of the drive rating, the motor will shut off (feature can be enabled / disabled). | | Stall Protection | If the motor tries to run in one direction for more than 300 seconds (configurable from 30 to 300 seconds), the motor will shut off. | | Over-travel Protection Switches | Two Form C (Retract and Extend) provide over-travel protection | Auxiliary Switches
(Field Adjustable) | Two Form C and two Form A,
all rated for 1 A, 250 V ac | | Customer Wiring | Terminals accommodate up to 12 AWG
(3.31 mm^2) | | Handswitch | Permits local electrical operation, independent of Demand input signal. | | Handwheel | Provides manual operation without electrical power. | | Motor | 120 Vac, single-phase, no burnout, noncoasting. Capable of 60 starts per minute | | Enclosure | Precision-machined aluminum alloy castings, painted with corrosion-resistant polyurethane paint, to provide a rugged, dust-tight, weatherproof enclosure designed to meet NEMA 4X standards. | | Mounting Orientation | Can be mounted in any orientation |
Mechanical Features;  Gear Train:
The Group 29 linear globe valve actuator utilizes a high-efficiency gear train designed for performance, long life, and minimal wear. It consists of a combination of precision-cut alloy steel and ductile iron spur gears and a precision ball screw. Beck Spur gears are exclusively made at our factory to ensure the high quality demanded of the Group 29 products.  Manual Operation:
Group 29 linear valve drives can be manually operated, without power, by a Handwheel directly connected to the drive motor shaft. This allows positioning of the valve in the absence of AC power. Tight-Seater™: Group 29 linear valve drives are equipped with a Tight-Seater™ device that ensures the valve is positively seated at the closed position. Self-Locking Mechanism (SLM): A self-locking mechanism is an integral part of the Group 29 linear valve drive system. The SLM is a coupling that transmits motor torque to the gear train, but instantly locks in place when the motor is de-energized. This prevents back-driveing due to dynamic valve load. Electrical Features Beck Drive Motor:
Precise, Reliable Control
Like all Beck drives, the Group 29 utilizes a low current draw, continuous duty motor design. This motor ensures that the drive will not coast or overshoot and will not overheat, even under continuous modulation. The net result is consistent, repeatable positioning with no duty limitations.  Electric Handswitch:
Time-Saving Local Operation
Similar to all Beck drives, the Group 29 is equipped with an override manual Handswitch to aid in the setup and installation of the drive independent of external control signals.  Auxiliary and Over-travel
Limit Switches:
Two non-dedicated Form C and Form A switches are available. These switches are cam-operated and easily adjusted in the field. Wiring connections are provided in the drive terminal compartment to allow easy access. | |
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