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GENERAL DESCRIPTION
7.
Auxiliary Low Water Cutoff (Optional): Breaks the
circuit to stop burner operation if the water level in the
boiler drops below the master low-water cutoff point.
8.
Safety Valve(s): Prevent buildup over the design
pressure of the pressure vessel. The size, rating and
number of valves on a boiler is determined by the ASME
Boiler Code. The safety valves and the discharge piping
are to be installed to conform to the ASME code
requirements. The installation of a valve is of primary
importance to its service life. A valve must be mounted
in a vertical position so that discharge piping and code-
required drains can be properly piped to prevent buildup
of back pressure and accumulation of foreign material
around the valve seat area. Apply only a moderate
amount of pipe compound to male threads and avoid
over-tightening, which can distort the seats. Use only
flat-jawed wrenches on the flats provided. When
installing a flange-connected valve, use a new gasket and
draw the mounting bolts down evenly. Do not install or
remove side outlet valves by using a pipe or wrench in
the outlet.
! DANGER
WARNING
Only properly certified personnel such as
the relief valve manufacturer's certified
representative can adjust or repair the boiler
relief valves. Failure to follow these
i n s t r u c t i o n s c o u l d r e s u l t i n s e r i o u s
personal injury or death.
750-364
Chapter 1
1-3
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