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 ...

As control valves play a key role in process quality and reliability, “extreme care” must be taken to avoid costly premature failures, possibly resulting in substantial loss and even plant shut-down, ...

The Bell & Gossett® snap zone valve is a compact four-wire thermoelectrically operated on-off zone valve designed for heating and cooling systems. Featuring an innovative compact design and an adapter ...