Belimo G220S-K+LF24-SR Valve Assembly

The Belimo G220S-K+LF24-SR Valve Assembly is a high-performance solution for precise modulating globe valve control in demanding HVAC applications. This assembly features a 3/4-inch NPT valve body constructed from durable bronze with high-grade stainless steel trim, specifically engineered for chilled or hot water and low-pressure steam systems. Utilizing a 2-way configuration, it delivers a 7.5 Cv rating with a modified equal percentage flow characteristic to ensure linear thermal output under varying loads.

The integrated Belimo LF24-SR actuator provides reliable proportional spring return functionality, returning the valve to its fail-safe position during a loss of power. Operating on 24Vac/dc, the unit accepts an analog 2-10Vdc control signal or can be interfaced with 4-20mA systems using the inclusive 500-ohm resistor. This spring return actuator is rated for an ambient range of -22°F to 122°F, making it suitable for a broad spectrum of commercial HVAC control environments where fail-safe operation and high resolution are non-negotiable.

• Precise Control: Modified equal percentage flow ensures stable temperature regulation in proportional control loops.
• Fail-Safe Reliabilty: Mechanical spring return fail-safe ensures positive close-off during power interruptions, protecting coils and equipment.
• Steam Rated: Robust stainless steel trim allows for continuous operation in low-pressure steam applications up to 35 psi.
• System Versatility: Accepts both 2-10Vdc and 4-20mA inputs, facilitating seamless integration with existing BAS and PLC controllers.
• Simplified Installation: Standard NPT threading and pre-assembled actuator-to-bridge design reduce field labor and commissioning time.

Can this assembly be used for steam applications?
Yes, the G220S-K valve body is designed with stainless steel trim to handle steam up to 100 psi inlet pressure and differential pressures according to technical load limits.

How do I wire the LF24-SR for a 4-20mA signal?
For 4-20mA operation, the provided 500-ohm resistor must be installed across the input signal wires to convert the current signal to a 2-10Vdc range readable by the modulating actuator.

Does the actuator support manual override?
While the LF series emphasizes automatic fail-safe positioning, the proportional spring return mechanism is designed to sit in its normal state when unpowered; review technical documentation for specific manual positioning limits during commissioning.

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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.