Overview
The Belimo B277+AFRX24-MFT-S is a 3-inch 2-way Characterized Control Valve (CCV) and MFT spring return actuator assembly equipped with an auxiliary switch for fail-safe control and signaling.
Features
- 2-way CCV construction with robust stainless steel trim
- Multi-Function Technology (MFT) for versatile control signal integration
- Spring return fail-safe protection automatically responds during power loss
- Built-in auxiliary switch enables status monitoring and equipment interlocks
Specifications
- Valve Size: 3 inches
- Flow Coefficient: Cv 70
- Valve Type: 2-way Characterized Control Valve (CCV)
- Trim Material: Stainless Steel
- Control Type: MFT / Programmable
- Actuator Type: Spring Return with Auxiliary Switch
Applications
- Hydronic flow control in commercial building HVAC systems
- Equipment interlocking and auxiliary status signaling in chilled or hot water loops




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