Vertical stainless steel foam generator

1. Overview

PCL series low expansion foam generator is a fixed device installed on the oil tank, which sprays foam onto the combustible liquid surface, quickly covering the entire burning surface and extinguishing the fire, effectively preventing the spread of fire.

It is mainly suitable for the production, storage, transportation, and use of flammable and combustible liquids. It is especially suitable for extinguishing storage tank fires and large-area flowing fires.

2. Working Principle

The PCL series low expansion foam generator provides foam mixed liquid by the foam mixing device. When the liquid flows into the inlet of the generator and passes through the nozzle, a diffused atomized jet is formed, which generates negative pressure around it, thereby sucking in a large amount of air to form foam. The foam enters the storage tank through the foam spray pipe or guide plate and flows down along the tank wall (flow guide groove), smoothly covering the burning liquid surface, and achieves the purpose of fire extinguishing by using the cooling and suffocation effects of foam.

3. Structure and Dimensions

4. Precautions:

1. The generator should be installed vertically on the upper part of the storage tank, and should not be installed on the top of the storage tank. When installing, the dust cover should face up and should not be installed sideways. When used for external floating roof tanks, it should be installed on the foam guide hood at the top of the storage tank.

2. When installing the generator, first punch a hole in the wall of the storage tank, leaving enough space at the top of the storage tank. The inlet of the generator should be higher than the liquid level of the storage tank by a certain size to prevent affecting the quality and formation of foam, and to prevent liquid from flowing out from the generator.

3. If the generator is used to extinguish water-soluble Class A, B, or C liquid fires, the guide plate is not applicable and should be replaced with other suitable buffer devices (such as a landing slot or foam trough).

4. The nozzles of the generator cannot be clogged by debris. The pipeline should be flushed before installing the foam generator to ensure that there is no debris in the pipeline. Then install the foam generator and adjust the foam system.

5. To prevent gas from leaking out of the storage tank from the generator, there is a sealed glass on the outlet end of the generator housing. One side of the sealed glass has a fragile scratch, and the scratch should be installed facing the outlet direction. The sealed glass will break with a (0.10-0.30) MPa mixed liquid impact. The sealed glass should be installed after debugging. It should be replaced promptly if the sealed glass is damaged due to one-time use or other reasons.

6. The generator can also be used to spray foam to extinguish flowing fires inside the protective barrier of the storage tank. When used outside the protective barrier, it should be installed on a baffle that can make foam flow to the burning liquid surface.

7. To ensure the safety of the generator, a support frame should be installed under the generator. Due to tank rupture or deformation during a fire, the generator and pipeline may be damaged. To reduce damage, a section of metal hose that can provide a cushioning effect should be installed in the inlet pipeline of the generator or other measures.

5. Use and Maintenance

1. Pay attention to ensuring that there is no debris in the mixed liquid supplied, to prevent the generator from clogging.

2. Ensure that the air intake hole of the generator is unobstructed and not blocked by debris.

3. The generator should be checked regularly for damage, and damaged parts should be replaced promptly.