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 ...

1. Can I run a hot water zone off an existing steam boiler without a heat exchanger? Yes, but there is a limit to how much radiation your steam boiler can support. Manufacturers list two capacity ...

In steam boiler applications, pressure relief valves (PRVs) are the silent sentinels — the last line of defense against potentially disastrous overpressure situations. In a perfect world, boiler ...

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 ...

Q: Our home is heated by hot water (radiators, not radiant heat). The system is divided into five zones, each with its own thermostat. What causes pipes to "bang" when, as I assume, one of those ...

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 ...