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Bray Commercial VAMS24-27 Valve Actuator Spring Return Modulating Actuator 24V 27 Lb-in

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Special Price $366.53 Regular Price $406.84
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SKU
VAMS24-27
The Bray Commercial VAMS24-27 Valve Actuator is a spring-return modulating component used in HVAC systems to regulate fluid flow through control valves. It is powered by a 24 V power supply with a 27 lb-in torque output, and adjusts valve position based on control signals and automatically returns to a fail-safe position when power is lost. It is usually fitted in chilled water, hot water and air handling systems and allows in the accurate modulation of temperature and flow conditions. This actuator is a positioning control element in the system, which allows the coordinated regulation of processes.
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Product Overview:
Commercial HVAC systems use modulating actuators to adjust valve or damper positions in response to changing control demands. The Bray Commercial VAMS24-27 Spring Return Modulating Valve Actuator is an OEM electric actuator designed for applications requiring proportional positioning. Operating on a 24V AC/DC supply, it provides 27 lb-in (3 Nm) of torque and combines modulating control with a spring-return mechanism for a defined mechanical response when electrical power is interrupted.

Modulating Signal Control:
The actuator converts an electrical control input into mechanical positioning movement, allowing a compatible valve or damper to move to intermediate positions rather than operating only fully open or fully closed. This modulating operation enables the actuator to adjust equipment position in response to changing control demands.

Spring Return Operation:
When electrical power is interrupted, the actuator's internal spring drives its output toward the designated return position. The direction of movement depends on the actuator's mounting orientation and configuration. This mechanical return action does not require an active electrical command, providing a predetermined response during power loss.

Replacement Guidelines:
Replacement may be necessary when the VAMS24-27 fails to respond to control commands, cannot complete its normal movement, or develops mechanical or electrical damage that prevents reliable actuator operation.

Common Failure Symptoms:

  • Actuator fails to move when powered.
  • Output shaft becomes loose or mechanically damaged.
  • Actuator repeatedly stops before completing its commanded movement.
  • Internal mechanism produces grinding or abnormal mechanical noise.
  • Housing, mounting interface, or electrical connection shows visible damage.

Equipment Compatibility:
The Bray Commercial VAMS24-27 Spring Return Modulating Valve Actuator is an OEM actuator intended for compatible commercial HVAC valve and damper applications. Suitability depends on the connected equipment's mounting interface, shaft or coupling requirements, rotation, spring-return direction, electrical supply, and control signal. Confirm these requirements against the equipment manufacturer's documentation, including whether the VAMS24-27 is specified for the application or an approved equivalent is identified. Matching voltage and torque ratings alone does not establish compatibility.

Technical Specifications:
Brand: Bray Commercial
Part Number: VAMS24-27
Component Type: Electric Modulating Valve Actuator
Power Supply: 24 VAC/DC
Torque: 27 lb-in (3 Nm)

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Product Questions (5)
Customer Questions
Can the Bray Commercial VAMS24-27 operate with a 4–20 mA control signal?

Yes. The actuator supports a selectable 4–20 mA input option when used with the specified external resistor. Confirm that the control system and actuator configuration support this input before ordering.

What should I compare when replacing a VAMS24-27 actuator?

Compare the existing actuator's mounting interface, shaft or coupling requirements, rotation, spring-return direction, power supply, and control input with the replacement specifications. Also verify the required torque and equipment manufacturer's approved actuator information.

Does the VAMS24-27 provide spring return during a power interruption?

Yes. Its internal spring drives the output toward the designated return position when electrical power is interrupted. The return direction depends on the mounting orientation and actuator configuration.

Can the VAMS24-27 replace an actuator with the same 24V power supply?

Not necessarily. Matching the 24V AC/DC supply does not confirm compatibility. The mounting arrangement, torque, rotation, spring-return direction, and control signal must also meet the connected equipment's requirements.

What is the difference between the VAMS24-27's power-on runtime and spring-return time?

The power-on runtime is specified as 90 seconds for 90° of rotation, while the spring-return time is 12–17 seconds for 90° of rotation at room temperature. These values describe the actuator's powered movement and its mechanically driven return movement, respectively.