Benchmark 750-3000 Installation & Startup Manual
SECTION 2
– INSTALLATION
OMM-115_D
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GF-200
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5/9/2019
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2.7 PRESSURE RELIEF VALVE INSTALLATION
An ASME rated Pressure Relief Valve is supplied with each Benchmark Boiler. The pressure
rating for the relief valve must be specified on the sales order. Available pressure ratings range
from 30 to 160 psi (207 to 1103 kPa). The relief valve is installed on the hot water outlet of the
boiler as shown in Figure 2-5a and 2-5b. A suitable pipe joint compound should be used on the
threaded connections. Any excess should be wiped off to avoid getting any joint compound into
the valve body. The relief valve must be piped to
within 12 inches (30.5 cm)
of the floor to
prevent injury in the event of a discharge. No valves, restrictions, or other blockages are
allowed in the full port discharge line. In multiple unit installations the discharge lines must
NOT
be manifolded together. Each must be individually run to a suitable discharge location.
Figure 2-5a: BMK 750/1000 P&T Relief Valve Location
Figure 2-5b: BMK 1500/2000/2500/3000 P&T Relief Valve Location
PRESSURE
RELIEF VALVE
4” HOT BOILER
WATER OUTLET
INSTALL
TRIDICATOR GAUGE
HERE
(P/N 123675-TAB)
3” HOT BOILER
WATER OUTLET
PRESSURE
RELIEF VALVE
INSTALL
TRIDICATOR GAUGE
HERE
(P/N 123675-TAB)
