Belimo b232+afrx24 Control Valve 1.25 in 2-way 37 Cv 24V

Product Description

The BELIMO b232+afrx24 is a characterized control valve (CCV) assembly combining a 1.25-inch, 2-way valve body with a configurable spring-return actuator. Rated at 37 Cv, it is designed to regulate hydronic heating and cooling systems by modulating water or glycol flow in response to on/off control signals at AC/DC 24 volts. The spring-return function drives the valve to a defined fail-safe position on power loss, making it suitable for applications where flow shutoff or open-on-failure is required. Licensed HVAC and mechanical contractors install this assembly in commercial and light commercial hydronic systems.

This valve and actuator assembly is used in fan coil units, air handling units, and terminal unit hydronic piping where precise flow characterization and reliable shutoff are needed. The 2-way configuration controls supply or return flow in a single pipe leg. On/off control makes integration straightforward with basic DDC or relay-based building automation systems. It is appropriate for both new construction and retrofit hydronic piping work in commercial HVAC applications.

Key Features

• Characterized valve design delivers consistent flow control across the operating range
• 37 Cv flow coefficient suitable for medium-capacity hydronic terminal units
• Spring-return actuator provides fail-safe positioning on power loss
• AC/DC 24-volt input allows compatibility with standard low-voltage control wiring
• On/off control mode simplifies wiring and integration with relay or DDC outputs
• 2-way, 1.25-inch valve body fits standard hydronic piping configurations

Compatibility

Designed as an OEM-style characterized control valve assembly for use in commercial hydronic heating and cooling piping systems requiring a 1.25-inch, 2-way, spring-return valve with on/off actuation at 24 volts.

Installation Notes

Installation should be performed by a licensed mechanical or HVAC contractor familiar with hydronic piping systems and low-voltage controls. Shut off system water flow and depressurize the line before removing or installing the valve body. Power down the 24-volt control circuit before wiring the actuator to avoid damaging the actuator electronics. Follow local mechanical codes and the manufacturer's flow-direction markings on the valve body when orienting the assembly in the piping.

Technical Specifications

• Valve Type: Characterized Control Valve (CCV)
• Valve Size: 1.25 inches
• Configuration: 2-Way
• Flow Coefficient (Cv): 37
• Actuator Type: Spring Return
• Voltage: 24 volts AC/DC
• Control Input: On/Off

Standard Information

• Brand: BELIMO
• Manufacturer Part Number: b232+afrx24