Elkhart Brass SPIT-FIRE 8394053 Monitor - Manual (Page 6)

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B. ATEX Product Marking:
II 3 G c T4
IV. I NSTALLATION I NSTRUCTIONS
A. Component Mounting
1. Monitor Installation
1.1. Attach 4" 150 lbs. Flat Face class ANSI pattern companion flange to water supply pipe
so that bolt pattern will allow monitor to be installed with the "straight ahead" position
properly aligned. Alignment is correct when the "straight ahead" direction is centered
between adjacent flange bolt holes.
1.2. Install Monitor Assembly on water supply flange to match up to 4”-150 lbs. Flat Face
ANSI flange on inlet of Monitor with flange gasket between flanges. Install motor
cable junction box and secure inlet flange with eight 5/8-11 UNC Grade 5 hex. head
bolts. Torque bolts to 60-70 ft.-lbs.
1.3. Standpipe must be structurally strong enough to withstand reaction forces of the nozzle
when discharging a straight stream at 90º of the standpipe tower. The formula for
calculating nozzle reaction is: REACTION FORCE = 0.0505 x G.P.M. x √ P.S.I.
1.4. The inlet pressure at base of monitor must be high enough to allow for pressure loss
through monitor. To accomplish this use the pressure loss for G.P.M. flowing and add to
nozzle pressure. See monitor hydraulic data in section IX.
1.5. Install junction box bracket on top of monitor flange, aligning two holes in bracket with
flange mounting holes on rear of monitor. Secure bracket to monitor with two of the flange
bolts.
IMPORTANT : When installing monitor on a raised face flange or a wafer type butterfly
valve, it is critical that bolts be tightened uniformly to prevent cocking of the monitor relative to the
flange or valve. If the monitor becomes cocked, (see Fig. I) the monitor cast flanged base will fracture
and fail when the bolts on the “high” side are tightened.
Fig. I
2. Nozzle Installation