Belimo B221+LF24 3/4" 2-Way Characterized Control Valve CCV Cv24 Spring Return 24V On/Off

The Belimo B221+LF24 is a factory-assembled Characterized Control Valve (CCV) combining a 3/4" 2-way ball valve body (Cv 24) with a spring return LF24 actuator. Designed for precise two-position On/Off control of HVAC hot water and chilled water systems, this assembly delivers reliable fail-safe operation and easy integration into building automation systems (BAS).

Valve Specifications:

• Valve size: 3/4" (DN 20)
• Configuration: 2-way
• Flow coefficient: Cv 24
• Connection type: Female NPT (FNPT)
• Ball and stem material: Stainless steel
• Body material: Forged brass with nickel plating
• Seals: PTFE Teflon® with EPDM O-rings
• Flow characteristic: Equal percentage (2-way)
• Maximum close-off pressure: 200 psi (1/2"–2" sizes)
• Maximum differential pressure: 30 psi
• Leakage rating: 0% port A to AB; 2% maximum port B to AB

LF24 Actuator Specifications:

• Control type: On/Off
• Fail-safe: Spring return
• Supply voltage: AC/DC 24 V (nominal)
• Torque: 35 in-lb
• Run time: <40–75 seconds
• Spring return time: <25 seconds
• Electrical connection: 18 GA plenum cable, 1 m, with 1/2" NPT conduit connector
• Overload protection: Electronic throughout 0–95° rotation

Key Features:

• Factory-assembled valve and actuator — ready to install
• Spring return provides automatic fail-safe positioning on power loss
• Direct-coupled design — no linkage required
• Stainless steel ball and stem for corrosion resistance
• Compatible with building automation systems (BAS)
• 5-year warranty
• cULus listed

The Belimo B221+LF24 is ideal for HVAC hydronic systems requiring dependable On/Off zone control with fail-safe spring return functionality.