Steel Filters

We can Provide Steel Filters in a Variety of Configurations Pressure Types Standard units available Many options too Gravity Types Specialty Filters

Several Design Factors are Important to all Filter Configurations Process Application Filter Type Media Type Flowrate 2 – 3 gpm/sf – Ten States Standards 4 – 5 gpm/sf – used as well Backwash Distribution 30 - 50% bed expansion Allowable Headloss Even Water Distribution Filtering Backwashing

Pressure Filters are Ideal for Groundwater Applications Fe & Mn removal Arsenic removal Maintain Line Pressure (No re-pumping) They can be used with Pressure Aeration We offer two configurations Vertical <700 gpm most economical Horizontal >700 gpm most economical

Vertical Pressure Filter – Standard Configuration Build-Up 50% Freeboard 24” filter sand 10” graded gravel 60” SSH steel plate underdrain Backwash Method: Water only from in-service cells

Vertical Pressure Filter - Standard Air Release Loss of Head gauges 12”x16” manway Structural steel legs

VPF Standard Scope of Supply 100 psi & Non-code Air/vacuum release valve 12” x 16” manway Side inlet, bottom head effluent 24” sand on 10” graded gravel 60” Straight Side Height Underdrain flat steel plate with ABS nozzles Structural steel legs Water only backwash Sherwin Williams exterior prime & interior paint above underdrain

VPF - Options Design Pressures: 75, 125,150 Diameter: 4 ft to 12 ft in 6” increments Larger manways Pipe header/lateral underdrain Jack legs Media Anthracite, Dual, Mixed Manganese ANTHRA/SAND or Greensand Backwash Air Scour – in-bed air grid MULTIWASH

VPF - Options ASME Construction with stamp Non-code Construction SA516 gr 70 steel Inspected & stamped Ames and Thomasville – certified ASME Shop Non-code Construction A36 steel or A516 gr 70 shell plate Designed to pressure vessel standards with 3.5 safety factor Gives us an advantage over competition

VPF - Options Face Pipe Valves Control Sch 40 steel with cast iron fittings Mortar lined ductile iron Valves Standard: Bray Others: Pratt, DeZurik Control Manual Automatic - PLC

Horizontal Pressure Filters - Standard Two sizes: 8 or 10 ft. diameter Curved plate underdrain with #125 nozzles Overdrain 24” filter sand 14” graded gravel

Inside Horizontal Pressure Filter Dividing Partition Curved plate underdrain

Horizontal Pressure Filter – Standard Design Features MULTICELL® design Common underdrain Side piped Skid supported 12”x16” manway per cell and one/underdrain Air release Backwash: Water only from in-service cells

HPF Standard – Standard Design Features 100 psi & non-code 8 or 10 ft. dia. Air/vacuum release valve 14” x 18” manways per cell MULTICELL inlets, common effluent 24” sand on 14” graded gravel Curved steel plate underdrain with ABS nozzles Structural steel skid Water only backwash Tnemec paint above and below the underdrain

Our HPFs Have Many Options Available to Meet Your Customers’ Needs Length – 12 to 50 ft Number of cells – 2 to 9 Saddle support ASME Code construction Media Anthracite only, Dual media, Mixed media ANTHRA/SAND or Manganese Greensand Piped Header/lateral underdrain Backwash Air scour MULTIWASH

HPF Installation

Gravity Filters Can be Used for a Wide Variety of Applications Surface Water Turbidity Removal Color Removal General Solids Removal The Filter can also be used for Direct Filtration <25 NTU peak Conventional Pre-Treatment – Roughing Filter Two Configurations Round (tub) <700 gpm Rectangular >700 gpm

Common Gravity Filter Features – Round & Rectangular Underdrain Flat steel plate Common or individual cells Troughs Inlet distribution Backwash waste collection Flow Control Method Flow splitting Effluent rate of flow control Level Control Declining rate Paint Exterior primer Interior primer/finish above the underdrain

Round Gravity Filters DIAMETER HEIGHT 6” increments Maximum 12 ft dia. 10 - 12 ft max

Rectangular Gravity Filters ALL SIZES 12 ft width maximum 10 - 12 ft max. height 50 ft max. length TYPE Shutdown Continuous MULTICELL Single 4 or more cells INDIVIDUAL CELL EFFLUENT MULTIBLOCK option Goldkist, FL – Industrial and DAVCO Install

Material Options Provided To Suit Customer Requirements Steel (Standard) Stainless Steel Type 304 Type 316 Aluminum

Backwashing Options are Available too WATER ONLY AIR FOLLOWED BY WATER In-bed air grid OR Below the underdrain SURFACE WASHERS MULTIWASH

The Filter Media and Underdrain can be Customized for the Duty Mono Dual ANTHRA/SAND Underdrain Nozzles Gravel retaining Media retaining (gravel-less)

There are Several Common Control Features Loss of Head Tube (Gravity) Gage (Pressure) Backwash Rate of Flow Weir (Gravity) #1639 Orifice (Pressure) Automatic Controls Pneumatic valves Diff. Pressure Switch PLC

Specialty Filter Designs for Unique Applications PRESSURE Ion Exchange GRAVITY CenTROL DuoVAL overhead storage Two cell center gullet Big filter area in small space Two cells with common gullet

ION EXCHANGERS (Softeners) Process Principles Design Criteria Process Scheme Other Applications

Process Principles Trading undesirable ions for desirable ions “Hard water” Ca & Mg ions (undesirable) >150 ppm “Soft water” Na ions exchanged (more desirable than hardness) 35 – 150 ppm 120 ppm typical target

Zeolite Resin - Cation Poly-styrene gel Regenerate in place using NaCl (6 lbs/cu.ft. typical) Life expectancy – 5 to 10 years Typical capacity: 20,000 grains/cubic foot Exchange process, not a filter

Design Criteria Typical Municipal Target: 120 ppm blended hardness Iron <0.5 ppm Chlorine <1.0 ppm 3-5 gpm/sq.ft. loading rate (7 with one unit out of service) Portion of flow by-passed to obtain desired effluent Raw water line By-pass line and meter

Softener Internals Brine Distribution Overdrain Ion Exchange Resin Softened Water Underdrain Ion Exchange Resin Brine Distribution Support Gravel Overdrain

Process Flow Scheme Inlet By-pass Effluent

Typical Scope Two or Three tank system Resin & support gravel Hardwater bypass Manual Automatic PLC automatic controls Valves: Butterfly Sch 40 steel face piping Flow meters Brine pump

Ion Exchange – Other Applications Radium Removal (5 pCi/l combined limit) >95% Cation resin Barium Removal (2 ppm limit)

In Summary… We can provide steel filters in a variety of configurations Pressure Type Gravity Type Specialty Filters Many options are available to suit customer needs!

Steel Filters