Single Screw Pumps / Progressing Cavity Pump ( Series D1S )

A screw pump is a positive-displacement (PD) pump that use one or several screws to move fluids or solids along the screw(s) axis. In its simplest form, a single screw rotates in a cylindrical cavity, thereby moving the material along the screw's spindle.

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The pressure capabilities of the pump are a function of the number of cavities. Delta progressive cavity pumps are available in a wide variety of materials - cast iron or stainless steel wetted parts and 10 standard elastomeric materials. Delta’s versatile progressing cavity pumps are rugged, compact and highly efficient.

Fluids, which are delicate, shear sensitive or abrasive, low or high viscosity, with fibers, with high air content or large solids, can be conveniently handled by Delta’s progressive cavity pumps.

  • The pumping elements are rotor and stator.
  • The single helical rotor rolls eccentrically in a double threaded helix stator of twice the pitch length.
  • A series of sealed cavities 180° apart are created that appear to progress from suction to discharge during one rotation of rotor.
  • The opposing cavities fill and empty simultaneously resulting in a pulsation less flow.
  • The fluid travels axially with relatively low velocity and minimal agitation.
  • The stator is made of a resilient elastomeric material and bonded to the stator tube.
  • The important feature of the pumping principle is the ability to handle slurries and solid particles. The elastomeric stator also permits passage of solid particles due to elastomeric deformation.
  • Sturdy drive design provides strength for rigorous continuous operation.
  • Unique joint design is very simple and maintenance free joint, does not require replacement due to wear and tear, common in other joint designs.
  • Maintenance friendly design of the pump enables complete maintenance of the pump without removing the suction and discharge pipelines.
  • Close coupled models with built-on speed reducers offer compact pumping unit.
  • Stators are available in a wide range of elastomeric.

Typical Parameters

Capacity: 5 to 2700 lpm
Differential Pressure: 24 bar max.
Temperature: from cryogenic to 100°C
Viscosity range: 1 to 100,000 cp

Drive arrangements possible:

  • Direct drive with motor
  • Through gear box
  • V-belt pulleys
  • Variable speed drives
  • Special drives such as hydraulic, with I.C. engines.

Typical Industries, Applications & Fluids

Municipal/ Industrial Transfer Service Sampling Polymer Feed Dewatering Sludge Transfer Chemical Feed Effluent with & without solids, Milk of Lime General Sewage Slurry, Media Protective Chemicals
Food Process & Production Process Transfer Loading/ Unloading, Metering Collecting Alcoholic Beverages, Apple Puree, Baby Food, Beer, Beet Sludge, Biscuit Dough, Citrus Fruit Masher Cream Cheese, Edible Oil, Eggs, Raw Fats, Fish Residues, Fruit & Berry Masher, Honey, Ice Cream Lard, Meat Extract, Milk, Mustard, Tomato Paste, Vegetable Oil, Wine, Yeast
Industrial Centrifuge Charging, Transfer, Filter Charging Kiln Charging Drainage, Metering, Tank Loading/ Unloading Pit Emptying Gas Scrubbers Acids, Adhesives, Caustic Soda, Cellulose, Cement Slurry Dye Liquor, Dye Baths, Flouring, Plaster, Grout,Ink Lyes, Mortar, Coal Slurry, Lime Slurry
Chemical Process Transfer Loading/ Unloading, Metering Collecting Acids, Adhesives, Colours, Cosmetics, Detergents Glue, Lacquers, Hair Oil, Hand Washing Cream, Paints, Shampoos, Waxes
Petrochemical Process & Production Transfer Loading/ Unloading Metering Crude Oil, Oil Sludge Oil Tank Residues, Processed Oil Waste Products
Utilities Transfer Loading/ Unloading Fuel Oil Coal/ Oil Slurry Coal/ Water Slurry

Company News

  • Delta successfully commissions pumps on the Coastguard 06-CG-OPV for 7 ships.
  • Delta gets approval from NTPC for screw pumps & gear pumps.
  • Delta completes export order for supply of pumps for 10 ships for leading European Shipyard.
  • Delta successfully replaces Chinese screw pumps for the critical fuel oil firing application in a UMPP.
  • Delta provides Bitumen Pumps with variable speed drive to HPCL refinery.
  • EIL, a leading Engineering consultant, approves Delta Pd pump range.
  • Kuwait Oil Company (KOC) enlist Delta as an approved supplier for pumps .
  • Overseas orders : from a Refinery in the Middle East.
  • Coast Guard trusts Delta Pd pumps for Gearbox lubrication duty.
  • Pumping systems for DG Set based power plant from Bangladesh and Nigeria.
  • Supplies pumps & Pumping systems for various power plants & refineries of Dangote Group in Africa.
  • Commissioning pumps for White Oil Products for Stripping applications.
  • Industry's first Twin Screw Pumps without timing gears commissioned successfully!