Belimo B315+LF24-SR Valve Assembly

The Belimo B315+LF24-SR is a precision-engineered 3-way characterized control valve (CCV) assembly designed for modulating control in various HVAC applications. This 1/2-inch NPT valve features stainless steel trim and a Cv of 10, ensuring high durability and resistance to scaling or erosion. Paired with the LF24-SR spring return actuator, the assembly provides a 35 in-lb torque output and operates on a 2-10VDC proportional signal. The true spring-return safety function ensures the valve moves to its failsafe position upon power loss, a critical requirement for protecting coils and maintaining system integrity. Optimized for both 24VAC and 24VDC circuits, this Belimo assembly offers linear flow characteristics and bubble-tight shut-off, significantly improving hydronic system efficiency and reducing hunting in complex PID loops. Contractors rely on this specific combination for its high close-off pressure rating and long-term reliability in water-side control applications.

Key Performance Benefits

• Forged Brass Body: Built with stainless steel ball and stem for maximum service life in corrosive environments.
• Fail-Safe Operation: The LF24-SR actuator ensures reliable spring-return during power interruptions.
• Precise Modulating Control: Utilizes a proportional 2-10VDC control signal for accurate temperature regulation.
• High Flow Capacity: A 10 Cv rating provides optimized flow for medium-sized air handling units and heat exchangers.
• Zero Leakage: Characterized control technology eliminates bypass leakage and improves energy efficiency.

Common Questions

What is the maximum fluid temperature for the B315+LF24-SR?
This valve is rated for chilled or hot water systems with a temperature range typically between 0°F to 250°F (-18°C to 120°C).

Can I use this valve for steam applications?
No, Belimo B315 series valves are designed for hydronic water and glycol solutions up to 60%; they are not suitable for steam service.

Is the actuator direction reversible?
The LF24-SR failsafe direction (normally open or normally closed) is determined by its mounting orientation on the valve stem.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.