Recently I wrote in this column that every component in a controls circuit is a power supply, a switch or a load — no other possibilities. And that means that every control, hydronic or otherwise, is ...

Description: This zone valve is for use in hydronic heating and other HVAC systems, such as those with fan coils and air handlers. The mechanical valve allows one actuator to accept input voltages ...

The Zone Sentry™ zone valve’s patented technology uses a microcircuit-based logic to control a gear-driven electronically actuated ball valve to control fluid flow. The advanced design uses 93 percent ...

By combining advanced seat and seal concepts with durable materials and quality manufacturing, subsea valves can maintain leak-tight isolation, operational safety and system reliability throughout ...