Related illustrations

0862

Combined pressure reducing valve and pressure relief valve

· p. 146

The illustration shows a hot-water heating boiler with an exhaust flue, a hot-water supply riser, and a cold-water return pipe. The house water supply connects to the boiler return through a combined pressure reducing va

0852

Pressure relief valve

· p. 143

Two simplified cross-sections show a boiler pressure relief valve in its closed and open states. On the left, spring force holds the poppet valve seated when water pressure is below the valve rating. On the right, pressu

1115

Pressure relief valve

· p. 195

The illustration shows a building cross section with a steam boiler below a radiator, connected by a steam supply main and condensate return piping. Red arrows indicate steam movement toward the radiator and along the su