The VT3221 is primarily designed for liquid media

but always verify your specific pump curve to ensure it does not exceed the actuator's close-off rating

Its direct-mount design allows for seamless integration into high-pressure lines

Key Benefits: High Air Capacity: Integrated relay in the 2-pipe configuration supports multiple actuators and long tubing runs

For contractors troubleshooting airflow restrictions or high-limit trips

Siemens Building Technology 599-10311S Valve 319852-301 The VT3221 is primarily designedThe Siemens 599 10311S Valve is a professional grade 3 4 inch NPT 2 way ball valve designed for high performance fluid control in HVACR systems. Built with a rugged brass body and high grade stainless steel ball and stem, this 25 Cv valve is specifically engineered to handle hot water, chilled water, and up to 50% glycol solutions. As a full port model without a flow characterizer insert, it provides high flow capacity and is an ideal choice for 2