Fire
Suppression system >> Ansul - USA >> micro-k
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Systems Data Sheet
Features:
UCL
Listed (System Style only)
Environmentally
Friendly
One
Sizes Available – 2.5lb. (1.1. kg )
Two
Types are Available in the System Style – Standard and Pressure Low
Temperature Total Flooding Capability -40 oF (-40 oC)
Application
Typical applications are:
Engine
Compartments
Industrial
Cleaning Machines
Paint
Lockers
Stock
Rooms
Pump
Rooms
Switchgear
Rooms
Transformer
Rooms
The MICRO-K Fire Suppression System is an automatic fire suppression system
using a solid aerosol agent. MICRO-K generators can be utilized to protect
any Class B or C type hazard.
The generators can be used for Class B or C hazards.
The generators can be used in remote areas where power is not available.
System Description
The MICRO-K Fire Suppression System is a pre-engineered, solid aerosol type
system. The solid aerosol is contained in a device called a generator. Two
styles of generators are available: the system style which can be used in
conjunction with an electric or fusible link detection system utilizing an
ANSUL AUTOMAN Release or the self-contained style which utilizes a built-in
detector bulb.
The basic System Style system consists of:
System Style generators, either 2.5 lb.(1.1 kg ) in either the standard type
or the pressure type, an ANSUL AUTOMAN Release, fusible link detectors (or
electric thermal detectors), a pneumatic air cylinder for generator
actuation, and an optical remote manual pull station.
The largest Class B or C hazard that can be protected with 2.5 lb (1.1 kg)
size generators is 3330 cu. ft. (94.3 cu. m). Maximum of 10 generators per
system with each generator protecting 333 cu. ft. (9.4 cu. m).
When the temperature in the hazard exceeds the temperature rating of the
detector, the fusible link separates, causing the release mechanism to
puncture the nitrogen cartridge located in the ANSUL AUTOMAN Release. This
gas pressure operates a small pneumatic air cylinder located above the
generator. The movement of the air cylinder piston pulls a mechanical
actuator which is imbedded in the MICRO-K agent. Upon actuation, a chemical
reaction occurs in the agent, which generates a gaseous product which
condenses to a fine particulate. The particle size of the product is larger
than that of ordinary gases such as air, nitrogen, or carbon dioxide, but
smaller than that of dry chemical. It is classified as a particulate
aerosol. This aerosol is then dispersed throughout the hazard. The aerosol
breaks the combustion reaction chain of the fire.
The Self –contained style generator contains a built-in detector bulb. The
bulb is available in several temperatures. The self-contained style
generator is used for protection of class B, C hazards not exceeding
197.8cu.ft. (5.6 cu.m) of internal volume. When the temperature in the
hazard area reaches or exceeds the temperature rating of the detector bulb,
the bulb breaks, causing the internal spring in the generator to force the
inner shell down, thus actuating the unit. The same internal reaction takes
place as explained in the system style type generator.
Component Description
Agent - The solid aerosol agent is a family of fire extinguishing
chemicals in a solid phase. Upon actuation, a chemical reaction occurs which
generates a gaseous product which condenses to a fine particulate .When
introduced to a fire situation; this aerosol breaks the combustion reaction
chain of the fire radicals (hydrogen, oxygen, hydroxyls). The aerosol
particles create large surface area for capturing these radicals. As a
result, the fire reaction is broken and the fire is extinguished.
MICRO – K GENERATOR (System style) – The MICRO-K generator assembly
consists of three metal enclosures: an inner shell, a middle shell, and an
outer shell. Contained in the inner shell is the MICRO-K agent. A mechanical
actuator is imbedded in the agent. The mechanical actuator is actuated by
pulling on the stainless steel wire attached to the top of the generator.
This system requires the use of an ANSUL AUTOMAN Release and fusible link
detector(s) (or electric thermal detectors) or the use of a mechanical
Release Mechanism for system actuation. For ANSUL AUTOMAN release actuation,
the generator is actuated by a pneumatic operated air cylinder pulling the
wire. The cylinder receives its pressure from the nitrogen actuation
cartridge in the ANSUL AUTOMAN release. For mechanical actuation, the cable
is pulled directly by the spring. The generator assemblies are available in
two sizes: 2.5 lb. (1.1 kg).
ANSUL AUTOMAN Release – The ANSUL AUTOMAN release consists of a metal
enclosure which contains a spring-loaded puncture pin release mechanism and
a nitrogen actuation cartridge. The ANSUL AUTOMAN release provides
automatic-pneumatic actuation of the MICRO-K system. Two types of releases
are available: the mechanical release and the electric release. Fusible link
detectors can be used on either release and electric thermal detectors can
be used on the electric release. When the release is actuated, a pin
punctures the nitrogen actuation cartridge and the gas pressure operates a
small air cylinder located above the generator, which in turn, pulls the
mechanical actuator.
Mechanical/Manual Release Mechanism – The manual release mechanism contains
a spring assembly which is attached to the detection line and the actuation
cable from the MICRO-K generator. When the tension is released from the
detection line, the spring tension pulls the cable to the generator, causing
actuation of the generator. The manual release mechanism also contains a
pull station for manual actuation. This release mechanism uses fusible link
detector(s).
Actuation Cartridge –The LT-19-R nitrogen cartridge is a sealed steel
pressure vessel containing nitrogen gas under pressure. The nitrogen
cartridge is designed to be punctured by the ANSUL AUTOMAN release mechanism
to supply the required pressure to actuate the MICRO-K generator(s). The
LT-10-R cartridge meets the requirements of DOT 3E-1800.
