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 ...

studying control valve user requirements for dynamic performance of control valves defining of terms, performance categories, test methods and instrumentation, performance parameters, specification ...

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 ...

In hydronic heating, to control where heated water goes to various sections of a building, the system might rely on two or more zone valves. A zone valve opens or closes based on demand from a ...

Fire-protection equipment supplier Fire & Security Techniques (FST) has introduced its Fire-Eater ZSV-25 local zone valve (ZSV-25) onto the local market for use in systems where multiple zones in ...