Salher
SALHER - Model DBF -Fine Bubble Diffusers
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The fine bubble diffusers DBF manufactured by Salher are composed of two PVC tubes connected to a “t” piece. An EPDM membrane develops around the tubes that diffuse the air distributed inside. The micro-cuts of the membrane work as a valve which releases the air under pressure and closes to the passage of water. As a result, a thin air bubble with small diameter from 0.5 to 1.0 mm, slowly rises to the surface. The performance is considerably improved due to a larger oxygen transfer surface and a longer residence time of the bubble in the water.
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- Cast iron cover manufactured in accordance with ISO 1083 (1987) according to the class D 400 of UNE-EN-124 (1995), with inscription "water treatment".
- Circular cover with safety locking system, by rotation and protected with plastic screw. Includes anti-noise and anti-slip polyethylene joint.
- The frame contains alveoles to optimize its installation and 4 holes to clamp it to the ground if necessary.
- For roads, including pedestrian streets, roadsides and parking areas for all type of vehicles (group 4 of the UNE EN-124 of 1995).
- Diffusers are composed of two PVC pipes connected to a T-shape element. Pipes are covered with an EPDM membrane which distributes the air.
- Micro-openings of membrane operate like a valve which releases the air under pressure, then is closed during the water passage. An air bubble with reduced diameter,
0,5 to 1 mm, rises slowly to the surface. The equipment efficiency is improved by 2 factors:
* Oxygen transfer surface is increased.
* The air bubble stays longer in water.