Hydrostatic Release Unit

The Hammar H20 hydrostatic release unit is designed for liferafts from 6 up to 150 persons.

The Hammar H20 release unit consists of a double looped white rope line, a release mechanism and a Red Weak Link™ (breaking strength 2,2 ± 0,4kN). For smaller liferafts (from "" persons and outside SOLAS regulation) we recommend Hammar H20 Small Rafts model with a special weak link, identified by the green lower thimble (breaking strength 1,2 ± 0,4 kN).The white strong rope of Hammar H20 is secured to the deck or liferaft cradle and attached to the liferaft lashing with a sliphook. If the ship sinks, the water pressure will, within 4 metres, activate the sharp knife which cuts the white strong rope and the liferaft will float free. As the ship sinks, the liferaft painter line will be stretched and the liferaft starts to inflate. The Red Weak Link™ breaks and survivors can board the floating liferaft. The Hammar H20 needs no annual service, maintenance or spare parts, but MUST BE REPLACED AFTER TWO YEARS.

Thanner Serviceable Hydrostatic Release Units are designed for heavy duty installations, reliable function and no limited lifetime if serviced regularly. Service intervals follow the raft servicing. The units can be manualy released and reset for continued service. The DK84.1 is approved to the new MED and SOLAS regulations together with ships wheel approval, USCG, TC and many others. The unit is made from stainless steel and composite polyamid plastic to meet the tough requirements of the marine environment. The unit operates independently of the life raft buoyancy and are approved for any life raft up to a load of 1850 kgs. All parts can be recycled and are made from non-toxic materiales. Special versions/release depths are available on request. The DK84.1 FN and DK84 RN2 does not comply with MED / SOLAS but have the same main carateristics as DK84.1  None SOLAS versions are available with release depths down to 250m water gauge.