diadiskpump.com: The DIADISK Pump

PRINCIPLES OF OPERATION

The DIADISK® Pump is a unique semi-positive displacement pump specifically designed for water and wastewater biosolids transfer. The principles of operation are simple: The suction disk creates a vacuum as it lifts off of the casing seat. As the suction casing is filled with the incoming fluid, the fluid above the suction disk is displaced and flows into the second stage. The second stage has displaced and discharged the liquid above the discharge disk and is closing while the first stage suction disk is opening. Eccentrics drive the disks 180 degrees opposite of one another with the cycle of each disk creating both a vacuum and a discharge pressure. The diaphragms operate in conjunction with their respective disks. As the diaphragms are being driven up and down by the drive cams, they assist the disks with the pumping hydraulics. Additionally, the diaphragms seal the liquid within the casing while supporting the concentricity of the disks to their casing seats.

APPLICATIONS

Non-Volatiles and Grit

Aerobic Thickened Sludge (WAS)

Lime Slurry

Gravity Belt Thickener Feed

Primary Sludge

Anaerobic Thickened Sludge

Secondary Sludge

Polymer Thickened Sludge from Gravity Belt Thickener

Scum

Centrifuge Feed

DAF

Belt Filter Press Feed

DIADISK® FEATURES AND BENEFITS

Dry start-up with no damage
Dry operation with no damage
Dry priming to 7 feet
Wet priming to 14 feet
Vacuum to 25 feet
Linear flow pattern for long stringy solids
Passes semi-hard solids up to 1 inch diameter (larger diameter for soft solids)
Non-Clogging for rags, hair, grease, plastic utensils, etc.
Adept with air/gas entrainment
Minimum pulsation with maximum solids suspension
Minimal turbulence and shear factors
Minimal abrasion factors
No internal tolerances to maintain
No internal check valves required for back flow prevention
Pumpage not in contact with rotating parts
No mechanical seals or packing
Pre-lubricated sealed bearings
Rotation can be either clockwise or counter clockwise
Quiet and smooth operation
Minimum maintenance / maximum reliability

BIOSOLIDS TRANSFER SPECIFICATION

304 Stainless Steel pump and motor mounting base
304 Stainless Steel pump shroud
304 Stainless Steel belt and sheave guard
304 Stainless Steel bolts, nuts, and lockwashers
416 Stainless Steel drive shaft, 420 Stainless Steel eccentric cam lobes, suction and discharge drive cam rods
High tensile strength Ductile Iron castings (Class 65) with machined surfaces for the diaphragms
High tensile strength Ductile Iron castings (Class 65) with raised machined surfaces for the disk seats
Neoprene (70 Durometer) disks with 4-ply Ballistic Nylon reinforcement and mechanical locking design
Neoprene (70 Durometer) diaphragms with 2-ply Ballistic Nylon reinforcement and integrated “C” cup design
Neoprene 2-ply nylon reinforced clack valve and 316 Stainless Steel chamfered clack valve plate with 12.56 sq. in. (full port 4" opening)
1300 cubic inch capacity suction and discharge hydraulic dampeners with 6” x 4” eccentric or 4” x 4” ductile iron bodies
Two piece 180°degree (45° increments) adjustable suction elbow
5 HP U. S. Electric motor, 1200 RPM, TEFC, Premium Efficiency, Hostile Duty for inverter duty service, 215T frame with finned cast iron casing and mounted on a dual adjustable sliding base
Glycerin filled 4” compound Stainless Steel vacuum/pressure gauge assemblies individually mounted on suction and discharge hydraulic dampeners
All Carbon Steel and Ductile Iron surfaces (inner and outer) coated with DuPont TGIC Industrial Thermoplastic Powder Coat, 3 Mils
TWO YEAR UNCONDITIONAL GUARANTEE AND WARRANTY

WARRANTY AND UNCONDITIONAL GUARANTEE

DIADISK® Pumps are warranted against defects in materials and workmanship for two years from the date of start-up and when operated at the specified conditions of service. The Guarantee shall be inclusive of the DIADISK® Pump’s operation per the specified system parameters. The Guarantee shall be concurrent with the Warranty and shall be UNCONDITIONAL for the two year period. A repair or replacement shall be as determined and authorized by Fluid Tech Group, Inc.

	Non-Volatiles and Grit		Aerobic Thickened Sludge (WAS)
	Lime Slurry		Gravity Belt Thickener Feed
	Primary Sludge		Anaerobic Thickened Sludge
	Secondary Sludge		Polymer Thickened Sludge from Gravity Belt Thickener
	Scum		Centrifuge Feed
	DAF		Belt Filter Press Feed