Siemens Building Technology 256-02069A Valve Assembly

The Siemens Building Technology 256-02069A Valve Assembly is a professional-grade 3-way mixing valve engineered for precise temperature modulation in terminal unit applications. Built with a forged brass body and durable brass trim, this 1/2-inch NPT valve is designed to handle hot or chilled water and glycol solutions up to 50% concentration. Featuring a 4.0 Cv linear flow characteristic, it ensures stable control and consistent performance in demanding commercial HVAC configurations. The assembly is powered by a rugged pneumatic actuator with a 10-15 PSI spring range, providing reliable spring return safety and accurate positioning. This ANSI Class 250 rated hardware allows for direct-coupled installation without specialized tools, making it an efficient choice for contractors servicing fan coils, reheat coils, and unit conditioners. With a temperature range of 35°F to 250°F, this Siemens pneumatic valve provides the heavy-duty reliability required for critical climate control infrastructure.

• Proportional mixing valve control for hyper-accurate fluid temperature regulation.
• Rugged ANSI Class 250 forged brass construction prevents premature wear in high-pressure systems.
• Universal bonnet design permits interchangeable pneumatic actuator or electronic upgrades without piping changes.
• Native spring return functionality ensures the valve reaches a fail-safe position during control signal loss.
• Fast, tool-free installation on the 1/2 NPT connections reduces field labor time.

• What is the maximum glycol concentration for this Siemens assembly? This unit is rated for control of water or glycol solutions with up to 50% concentration.
• Can this 3-way valve be used for steam applications? No, this specific brass trim configuration is intended for water and glycol; stainless steel trim models are required for low-pressure steam.
• How does the 10-15 PSI spring range impact control? The spring range determines the pneumatic pressure required to modulate the 4.0 Cv flow, ensuring the valve defaults to the bypass position upon air pressure failure.

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.