Product Description
The ReliableMBEC-14 Extended Coverage Sprinkler is
a special application sprinkler for the protection of metal
buildings with purlin roof support. The sprinkler has a very
extra large orifice, Nominal K=14 (200).
When the system is designed to NFPA 13 requirements,
MBEC-14 sprinklers provide protection in Ordinary
Hazard (Groups 1 and 2) and ExtraHazard (Groups
1and2) Occupancies to 175 ft2 (16.3m2)per sprinkler .
For FM Global, use Table 2 of FM Global Data Sheet
3-26 for nonstorage occupancies. FMdoes not permit the
use of these sprinklers in areas with flammable liquids or
shielded discharge. FM Global representatives must be
contacted for exact requirements. Reliable MBEC-14
sprinklers are to be installed according to the design criteria
shown in this bulletin. Figure 3 shows a suggested
method of installing the line piping.
ReliableMBEC-14 sprinklers use a levered fusible alloy
solder link

Design Criteria
Reliable Model MBEC-14 sprinklers are to be used in
systems designed and installed in accordance with
NFPA 13, FM Global requirements and all other local
codes and ordinances. The following design criteria also
apply:
 Design Density/Area method sprinkler. Minimum
End-head Pressure: 7.0 psi (0.5 bar) Minimum density:
0.21 GPM/ft2 (8.56 Lpm/m2).
 Maximum building height at peak is 32’ (9.8 m). Maximum
protected bay width is 25’ (7.6 m). See Figures
1. & 2.
 Sprinklers may be installed on pipe lines attached to the
top flange of primary roof beams. Sprinklers are to be installed
with deflectors parallel to the floor. See Figure 2.
 Maximum sprinkler spacing along the pipe is 14’ (4.3
m) and maximum water discharge length from the
pipe is 12.5’ (3.8 m). 175 ft2 is themaximum coverage
area. See Figures 2 & 3.
 Minimumsprinklerspacing is 7’ (2.1m)forNFPAand8’ for
FM Global. (This does not apply to back-to-back sprinklers
separated by the I-beams.) See Figures 2, 3 & 4.
 Deflector to commodity clearance shall be aminimum
of 10’ (3.1m). See Figures 2 & 3.
 Miscellaneous and in-process storage of 12’ (3.7 m) for
NFPA applications and 10’ for FM Global is permitted.
 Deflector distance below roof/ceiling is 12” (305 mm)
to 16” (406 mm). See Figure 4.
 Follow NFPA 13 requirements for obstructions to
sprinkler’s discharge (Extended Coverage Sidewall
Spray Sprinklers).
 Sprinklers can be installed under a sloping ceiling not
exceeding 2” (50.8mm)of rise in 12” (305mm)of run.
 Maximum working pressure is 175 psi (12 bar) at the
sprinkler.
 Available for use in wet, dry, or preaction systems.