Johnson Controls V-3766-1002 Valve

The Johnson Controls V-3766-1002 is a precision-engineered pneumatic globe valve designed for proportional control of hot or cold water in terminal units like fan coils and induction units. Operating with a normally open (PDTC) configuration, this valve features a 3-6 psi spring range and a 1.7 Cv rating, ensuring reliable flow modulation in hydronic systems. The 1/2" flare connection simplifies installation in tight mechanical spaces, while the 5/16" valve stroke provides precise positioning for effective heat transfer. Built with a 1/4" diameter stem and a 1/8" NPT barbed fitting compatible with 5/32" or 1/4" OD polytubing, the V-3766-1002 pneumatic valve is a staple for contractors maintaining legacy pneumatic control systems. Its brass construction and molded composition discs are specifically rated for water applications, providing the durability required for HVAC terminal unit control and commercial pneumatic actuator replacement projects.

Technical Specifications & Key Benefits

• Precise Flow Control: The 1.7 Cv rating and 5/16" stroke allow for fine-tuned modulation of water flow in commercial HVAC systems.
• Standardized Integration: Features a 1/8" NPT barbed fitting for easy connection to standard pneumatic polytubing.
• Durable Construction: Engineered for hot and cold water service, ensuring long-term performance in hydronic heating and cooling applications.
• Fail-Safe Operation: The Push-Down-To-Close (Normally Open) design ensures maximum flow in the event of a loss of control air.
• Ease of Installation: The 1/2" flare connection provides a secure, leak-resistant seal without the need for soldering in confined spaces.

Common Installation & Operation Questions

What is the maximum fluid temperature for the V-3766nd series?
These valves are typically rated for water temperatures up to 281°F (138°C), depending on the specific actuator and packing used in the assembly.

Is this valve compatible with steam applications?
The V-3766-1002 is primary designed for hot and cold water. For steam valve requirements, technicians should verify the seat material to ensure compatibility with high-temperature saturated steam.

Can I use 1/4" OD tubing with this actuator fitting?
Yes, the 1/8" NPT barbed fitting is designed to accept either 5/32" or 1/4" OD pneumatic control tubing, allowing for flexibility during field retrofits.

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.