Unitor fixed foam system for the purifier room
Fixed foam fire-extinguishing system
Unitor fixed foam system for the separator (purifier) room, designed to SOLAS II-2 Reg. 8. Sea water from the fire main passes an inline inductor which sucks foam concentrate from a 1 m³ GRP tank and injects it at 6 % into the water line; six spray nozzles cover the room. Because foam concentrate is corrosive, a flushing line between the water and foam lines is used after every discharge. The file holds the calculation sheet, material specification, drawings, data sheets, technical description, installation and filling procedure and the operating instruction.
Maintenance procedures
After a discharge or test
- Flush the foam and water piping through the flushing line with fresh water — foam concentrate is corrosive. p. 3
- Refill the foam tank to the full mark with the correct type of concentrate; keep the outlet valve closed and check the pressure/vacuum valve. p. 24
Technical specifications
| Protected area | 70 m², 150 mm foam depth within 5 minutes | p. 4 |
|---|---|---|
| Foam mixture rate | 360 l/min (6 nozzles × 60 l/min at 2.5 bar) | p. 4 |
| Expansion ratio | 1 : 7 | p. 4 |
| Foam concentrate for 5 min | 108 l (tank 1 m³ GRP) | p. 4 |
| Sea water supply | about 338 l/min (20.3 m³/h) | p. 4 |
| Proportioning | 6 % | p. 3 |
| Inline inductor MI 25H | brass, max 16 bar, pressure drop about 35 % of inlet, max 400 l/min, foam inlet ½" BSP, water 2" BSP | p. 20 |
| Inductor position | above the foam tank, max. 2.5 m above tank bottom | p. 20 |
Source: manufacturer's manual “EM-32 FOAM SYSTEM FOR PURIFIER ROOM”, 29 pages. Page numbers refer to the original. Check against the manual on board before work.