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powder-qlSEM-SAFE® by Danfoss Dry Chemical Powder Fire Fighting System

 

When introduced dry chemical powder fire fighting system directly to a fire, dry chemical powder extinguishes flames almost immediately. Dry chemical powder is intended for use in extinguishing fires involving bulk chemical agents and liquefied gases. Our dry systems are developed to meet the increasing demand for large capacity systems for the protection of ships carrying LNG/LPG and certain chemicals or agents in bulk.

Danfoss is one of the main suppliers of fixed dry powder systems, which comply with the IGC and IBC codes from SOLAS.

SOLAS rules (IGC and IBC) require that dry powder systems protect the entire deck area, cargo manifold, and connection areas from fixed monitors. In addition the system should be capable of supplying dry powder to any part of the cargo deck from at least two sources i.e., hand hose or hand hose line/monitor.

System operation

Nitrogen passing through a reduction valve pressurises the tank and nozzles fitted in the bottom atomise the contents. When a pressure of 0.9-1 MPa bar has been achieved, a pilot valve opens the main discharge valve and the dry powder flows through the distribution manifold to the monitor or hand hose line in question.

The pressure during discharge is kept constant by means of a reduction valve placed upstream of the dry powder unit. Release of the system may be remotely operated from the release boxes utilising a nitrogen pilot cylinder or alternatively manually operated at the dry powder unit.

When a pressure of 0.9-1 MPa bar has been achieved, a pilot valve opens the main discharge valve and the dry powder flows through the distribution manifold to the monitor or hand hose line in question. The pressure during discharge is kept constant by means of a reduction valve placed upstream of the dry powder unit. Release of the system may be remotely operated from the release boxes utilising a nitrogen pilot cylinder or alternatively manually operated at the dry powder unit.

The propellant gas system is designed to contain sufficient nitrogen to maintain the pressure during release as well as to clean the pipes and hand hose lines after discharge.

The hand hose line cabinet is delivered complete, mounted in a GRP/FRP box suitable for installation on the weather deck and
fitted with a release arrangement, trigger nozzle, and flange connection for the supply pipe. Each hand hose line cabinet is suitably spaced along the deck in such a way that no part of the deck is more than 33 m from two cabinets.

Monitor(s) are located to ensure coverage of the cargo manifolds on each side of the vessel. Release box(es) are provided beside the monitor(s) and in the cargo handling station.

Quality assurance 

Danfoss Semco systems are recognised by all leading classification societies and international authorities including ABS, BV, DNV, GL, KRS, LRS, NK, PRS, CCS, RMRS and others.

Read more about the system operation, Maintenance and quality assurance here

 

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