Johnson Controls V43AS-2 Water Valve

The Johnson Controls V43AS-2 is a heavy-duty, 2-inch pressure actuated water valve designed for high-capacity commercial refrigeration systems. This cast iron water regulating valve is specifically engineered to maintain head pressure by modulating water flow through water-cooled condensers. It features a four-hole ASME flanged connection and utilizes a 1/4-inch SAE external flare for the refrigerant pressure connection. Built for durability in demanding environments, the V43AS-2 operates within a setpoint range of 160 to 260 PSI, making it ideal for units using non-corrosive refrigerants. The bellows construction ensures precise response to pressure changes, preventing short-cycling and maintaining optimal system efficiency. This model is technically identical to the V43AS-2C, offering a robust solution for managing high-volume thermal loads. Properly installing this HVACR water valve ensures consistent condensing temperatures, even during varying ambient conditions or fluctuating water supply pressures.

Product Specifications & Benefits

• High-Capacity Modulation: 2-inch flanged body allows for significant GPM flow rates required for large-scale condensers.
• Precision Pressure Range: Adjustable 160 to 260 PSI spring range accommodates various refrigerant high-side requirements.
• Durable Construction: Cast iron body with internal components designed for long-term compatibility with non-corrosive refrigerants.
• Standardized Fitment: Four-hole ASME flange ensures a secure, leak-free connection to existing commercial piping.
• Versatile Application: Effective for both industrial process cooling and standard commercial HVACR applications.

Common Questions

Is the V43AS-2 compatible with ammonia systems?
No, this valve is designed specifically for non-corrosive refrigerants. For ammonia (R-717) applications, a stainless steel or specialized alloy valve is required.

How do I adjust the opening point of the valve?
The opening point is adjusted by turning the range adjustment screw. Increasing spring tension raises the pressure required to open the valve, thereby increasing the head pressure.

Can this valve be serviced in-line?
Standard maintenance can often be performed, but for major internal seat or bellows issues, the valve may need to be isolated or removed from the flanged piping for safety and accessibility.

This item must ship via truck. Please contact us for freight quote.

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.