Siemens Building Technology 656-0002 Valve

The Siemens Building Technology 656-0002 Valve is a pneumatic radiator valve engineered for precision fluid management in terminal unit applications such as fan coil units, convectors, and reheat coils. This Siemens Powermite 656 series assembly features a 1/2 inch flare connection and operates in a normally open configuration. Designed to handle both hot/chilled water and low-pressure steam, the 2.1 Cv flow coefficient ensures consistent performance across diverse hydronic and steam systems. The integrated actuator utilizes 3 to 8 psi spring range for linear modulation, while the enclosed housing protects internal components from mechanical damage and debris. For technicians working in confined spaces, the compact footprint and rotatable pneumatic connection simplify HVAC valve installation and air line routing. The stainless steel stem and replaceable soft disc provide reliable, tight shut-off, making this pneumatic control valve a staple for maintaining system efficiency in commercial environments.

• Optimized Compatibility: Designed for seamless integration with Siemens Building Technology controls in fan coil and terminal unit setups.
• High-Pressure Reliability: Features dual-sealing packed construction suitable for the increased pressures found in high-rise building applications.
• Durable Construction: Built with a stainless steel valve stem and brass body to resist corrosion and friction over extended run cycles.
• Field-Serviceable: Simplified design allows for valve disc replacement and packing maintenance without full body removal.

What is the maximum operating temperature for this assembly?
The valve is rated for media temperatures up to 250°F, covering a broad spectrum of steam and hydronic heating requirements.

Can the actuator be adjusted for easier air line connection?
Yes, the pneumatic actuator can be rotated on the valve body to accommodate different piping orientations in tight enclosure spaces.

Is this valve suitable for high-rise hydronic systems?
The dual-packing design is specifically engineered to maintain a reliable seal in systems with the high static pressures common in multi-story installations.

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.