Johnson Controls V-4334-1002 Valve

The Johnson Controls V-4334-1002 is a precision-engineered three-way brass mixing valve designed specifically for modulating hot or cold water flow in fan coil units and small air conditioning systems. This robust pneumatic control valve features a 5/8-inch flared connection and is equipped with a factory-installed V-3000-1 pneumatic actuator. With a 9 to 13 psi spring range and a 4.7 Cv rating, this assembly ensures accurate proportional control. The internal configuration is set for upper port closed (opens on signal) and lower port open (closes on signal), making it a reliable solution for maintaining discharge air temperatures. The cast brass body and stainless steel stem provide durability in demanding HVAC environments, while the 45-degree SAE flared connections simplify field installation for service technicians. This mixing valve is ideal for hydronic system balancing and constant pressure drop applications, ensuring optimal heat transfer efficiency across your cooling or heating coils.

Key Benefits

• Precision Mixing Performance: Features two modulating plugs that provide a characterized relationship between valve lift and flow for stable temperature control.
• Easy Serviceability: The V-3000-1 actuator can be removed by loosening a single set screw, allowing for quick maintenance without breaking pipe connections.
• Durable Construction: Built with a high-quality cast brass body and a molded synthetic rubber diaphragm for a constant effective area throughout the full 11/16-inch stroke.
• Flexible Installation: The bottom service connection includes a 90-degree elbow that can be rotated to accommodate tight clearance in compact fan coil cabinets.

Common Questions

What is the maximum operating pressure for the V-4334-1002?
This valve is rated for a maximum water pressure of 250 psig and a maximum control air pressure of 30 psig to the actuator.

Can this valve be used for steam applications?
No, the V-4334-1002 is designed specifically for hot or cold water service within a temperature range of -10°F to 150°F (-23°C to 66°C).

Does this assembly include a positioner?
The standard 1002 model includes the V-3000 exposed actuator; however, a V-9502 positioner can be field-added if sequential operation or additional positioning power is required.

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.