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The monitored blocking device is comprised of a ball valve, electrical monitoring component,
and a manually operated lever. The blocking is to be installed before the pressure reducer, and
is rated for both 2901 psi and 4351 psi systems. Lock is NOT included. Refer to the appropriate
technical data sheet for more information.
4.10 Pressure reducer
The pressure reducer reduces the pressure of the high pressure pipe system. The pressure
reduction occurs by means of a orifice, the diameter of which is dependent on the extinguish-
ing agent throughput and is determined by the pipe system via the DesignManager Oxeo. It is
installed between the high pressure pipe system (3408 psi and 5294 psi or 235 bar and 365
bar) and the nozzle pipe system, whereby any combination (if available) of the inlet and outlet
connection threads are possible. The pressure reducer is produced with conical inner thread
in accordance with two different standards:
•
ISO 7
•
ANSI/ASME B1.20.1-NPT
The pressure reducer can only fulfill its function in conjunction with the complete system.
Every deviation of the system from the design calculation (e.g. different nozzle holes) can
restrict the function of the pressure reducer. In this instance, the pressure reducer is to be
redesigned.
Orifice diameters are indicated by a four digit suffix. For example, part number 25014-0118
would correspond to a 2" NPT inlet / 2" NPT outlet pressure reducer with a 0.118" orifice diam-
eter. See Technical Data Sheet for all available pressure reducer configurations and maximum
orifice sizes.
The pressure reducer is moreover available in two different variants:
•
Pressure reducer with orifice for hole diameters of 0.118 in. (3 mm) to 1.811 in. (46 mm)
•
Pressure reducer with orifice and protective screen for hole diameters of 0.039 in. (1 mm) to
0.114 in. (2.9 mm)
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Inst. and Maint. Manual | Oxeo PR LCP | F_101921 Rev 02 | 10-2022 | en
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