The zone valve-actuator control is designed to operate zone valves or circuit thermal actuators. Master controls are equipped with valve and thermostat terminals; incoming 24-V power connection; and ...

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 ...

Hover over main image for caption information. A typical oil fired forced hot water heating system, installed in 1980 was ready for replacement. The original boiler room equipment was removed, which ...

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 ...

Boiler feedwater valves operate under severe service conditions and are subject to premature failure from seat leakage, cavitation, particulates, and frequent cycling. However, once the type and root ...