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Gravity Flow Sand Filter

What type of gravity flow media sand filter does your project need?

Hoffland Environmental Inc. – HEI will produce a custom gravity flow sand filter to meet your project needs.  Contact us to discuss your project specifications.

Gravity Flow | Media (Sand) Filters
The HEI low profile gravity flow sand filter continuously filters, by gravity, liquid suspensions producing excellent filtrate while simultaneously and continuously cleaning the filtration bed.

HEI’s low profile filter backwashing is a unique process. A slip stream of the most contaminated media, is taken from the bottom, cleaned and automatically redeposited on the top of the filter bed. The filter bed media slowly moves downward as the filtered water moves upward through the bed.

Since the HEI gravity flow sand filter continuously cleans a small portion of the media bed, the dirty backwash water, comprising approximately 5% of the total flow, may be continuously returned to the primary clarification device without stopping or surging the system.

A conventional pressure sand filter back flushes on a batch basis producing large intermittent flows of wastewater. In addition, the large volume of back flush water must be accumulated and held in reserve until it can slowly be treated. The HEI low profile continuous back flush sand filter eliminates the requirement of tanks and pumps to store, pump and process the back flush water.

Hoffland Environmental – HEI is a registered Texas Professional Engineering firm. Our headquarters are located in Conroe, TX. HEI is an experienced and registered Professional Engineering Firm and assumes total process responsibility for feasibility studies, design engineering, fabrication and installation. Over 1000 industrial Wastewater Treatment Systems have been installed worldwide over the past 40 years.

The company was founded in 1978 with the purpose to provide the design and installation of wastewater treatment equipment to the metal finishing industry.
Hoffland Environmental – HEI operates its own engineering and manufacturing facility in Conroe, Texas.

With our in-depth process knowledge of wastewater treatment engineering, in-house manufacturing and project management background, the company has a significant competitive advantage in bidding complete environmental equipment packages and turn-key plants.

Hoffland Environmental – HEI capabilities include: total process responsibility, feasibility studies, design engineering, fabrication, installation and start-up of environmental projects requiring any or all of the above major functions. We have the ability to post treasury rated performance bonds, provided by independent insurance agencies, for all major projects.

Each project can include standardized and custom designed elements. Contact Hoffland Environmental – HEI for your next project.


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