SOLAS / CCS Marine Stainless Steel Hydrostatic Release Unit - HRU
For Liferaft
1. Application
The hydrostatic release unit is inflating life raft rapid release
equipment. When the boat sink in accident, they can make the
inflating liferafts separate automatically with sinking boats at
the water depth of 2-4 meters, so that the aim of saving life can
be achieved.
2. Standards compliant
The hydrostatic release unit comply with the amendment 1996 of 1974
SOLAS convention and the international life-saving applicance n
code LSA. MSC. 81(70)
3. The Working of HRU:
a.HRU acts as a connecting media between life raft container and
ship deck, where it is stored.
b.The HRU comes in action under the pressure of water exerted on
HRU when the ship sinks below 4m of water level.
c.The HRU consists of a sharp knife or chisel which is used to cut
the strap lashed over the container carrying life raft, but it
still holds the painter at the weak link.
d.The HRU is connected to the container through a lashing
arrangement which can be disengaged quickly by means of slip hook
when launching the raft manually.
e.The HRU is connected to a strong point on deck through a weak
link.
f.When vessel sinks, the HRU cuts the rope and the container floats
to the surface of water.
g.As vessel sinks further, the tension in the painter causes the
life raft to inflate out of the container.
h.The tension acting on the weak link will cause it to break making
the life raft free from the ship.
i.When vessel sinks, the HRU cuts the rope and the container floats
to the surface of water.
4. Main SPecifications:
| Name | Hydrostatic Release Units |
| Type | HRU-1 |
| Main Material | Stainless Steel |
| Weight | 17.5kg |
| Release Depth | 2~4m |
| Tensile Strength | ≥15km |
