Steel Filters We can Provide Steel Filters in

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 • Groundwater • 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 60” SSH 50% Freeboard 24” filter sand 10” graded gravel steel plate underdrain Backwash Method: Water only from in-service cells

Vertical Pressure Filter - Standard Air Release Loss of Head gauges Structural steel legs 12”x 16” manway

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 – SA 516 gr 70 steel – Inspected & stamped – Ames and Thomasville – certified ASME Shop • Non-code Construction – A 36 steel or A 516 gr 70 shell plate – Designed to pressure vessel standards with 3. 5 safety factor – Gives us an advantage over competition

VPF - Options • Face Pipe – Sch 40 steel with cast iron fittings – Mortar lined ductile iron • Valves – Standard: Bray – Others: Pratt, De. Zurik • 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”x 16” manway per cell and one/underdrain • Air release • Backwash: Water only from inservice 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 – 6” increments – Maximum 12 ft dia. • HEIGHT – 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 • Media – 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 – Cen. TROL – Duo. VAL • 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 Na. Cl (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 Support Gravel Underdrain Softened Water

Process Flow Scheme By-pass Inlet 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 p. Ci/l combined limit) – >95% – Cation resin Barium Removal (2 ppm limit) – >95% – Cation resin

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