A western Pennsylvania, small private water utility, recently received four greensand filters to replace the filters that were failing. Unable to get the original manufacturer to provide new, duplicate units, our customer found our website.
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| Four New Greensand Filters and Greensand Media Ready for Shipment to Water Utility |
Because of State regulations, the systems and their operation needed to be as close to the original as possible, otherwise new permits would be required. Since Greensand is in very, very short supply, the media was changed to Greensand Plus from the same manufacturer. Sodium hypochlorite is used to continuously oxidize dissolved iron in the water coming into the filters. Also, these filters are very unique because they are much shorter than we normally manufacture. Our normal tank straightside is 60". These tanks are 36" straightside.
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| Three of Four Existing Manual Greensand Filters Showing Tank Corrosion |
What does the company do? Public water
What are the savings and/or ROI the customer wants to achieve? Not applicable. The customer is replacing old existing system with identical system
What are the operating conditions, e.g. flow, temp, continuous, etc.? 60 gpm, Well Water Intermittent Flow
What is the system configuration, e.g. # of tanks, standby units, etc.? Four greensand filters in parallel operation
Materials of construction of tanks, piping, valves, frame, etc.? ASME Code Steel Tanks, 6’ Diameter X 36” Shell straight-side , PVC glued with manual ball valves
Type of valves and actuators? Manual ball valves
Control philosophy? Backwash as required based upon differential pressure
Special Features? Short fat tanks, required to fit tight area
For Additional Information:
Greensand Filter Technical Bulletin
Greensand Plus Technical Data
For help sizing a new filter
For help repairing or rebedding a Greensand Filter
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