Triple Screw Pumps / Three Screw Pumps (TH 8X & TH 9X), Gujarat, India.

Triple Screw Pumps / Three Screw Pumps (TH 8X & TH 9X)

home Industrial Pumps Triple Screw Pumps / Three Screw Pumps (TH 8X & TH 9X)

Triple Screw Pumps / Three Screw Pumps (TH 8X & TH 9X)

Triple Screw Pumps / Three Screw Pumps (TH 8X & TH 9X) Send Enquiry Download catalogue

Triple Screw Pump For Industrial Oil (TH 8X & TH 9X)

General Information - (TH 8X & TH 9X) Pumps

Working Principle

Triple Screw Pumps are positive displacement pumps of very simple design. They consist of three rotating parts only “the rotors” which turn in their precisely machined housing bores. The rotors are of double start screws, continuously meshing to form delivery Chambers, which move constantly from the suction to the pressure / discharge side. Constant volume of the chambers and the uniformity of the movement allow an even flow. The pumps remain therefore near silent in operation and almost free of pulsation, even at high speed. The Principle of screw pump and its accurate profiles warrant high suction power. Axial loads on the rotor are compensates by adequate design of the bearing part. All the radial loads are self-compensated.


Triple Screw Pumps, type TH are used for the transfer of fluids with lubricating properties, as well as for generating pressure in hydraulic units or overcoming pressure in the hydraulic circuits. Main Industrial uses are in :

  • Power Hydraulics
  • Industries
  • Oil & Gas
  • Marine
  • Power Generation
  • Machine Tools
  • Compressor Lubrication
  • Filtrations
  • Lube
  • Windmill
  • Presses

Typical Liquids :

Bunker Oil, Engine Oil, Furnace Oil, Heating Oil, Hydraulic Oils, High Viscosity Lubrication Oil, Mineral Oil, Synthetic Oil, Oil Water Emulsions and Fuel Oils

Standard Material of Construction :

  • Pump Housing : Carbon Steel, Cast Iron, Aluminum Alloy & Stainless Steel
  • Rotors
    • Main Screw : Alloy Steel, Hardened Steel and Surface Treated Steel
    • Idler Screw : Steel, Hardened Steel, Surface Treated Steel and Cast Iron
  • Shaft Sealing : Mechanical Seal / Lip Seal with Elastomers in Viton, EPDM & Nitrile
  • Mounting Frames : Fabricated Steel
  • Relief Valve Parts : In Steel & Cast Iron

Mounting & Execution

Pump Mounting flanges are as per IS 3019 / 2 – IEC Standard. This has an added advantage for direct connection or mounting on to the standard electric motor. All the ports connections flanges comply to SAE 3000 standard


Screw-Pumps work perfectly in any position, provided suction and pressure lines are arranged in a way that prevents emptying of the pump when at a standstill.

Running Dry or with Non Lubricating Liquid will damage the pump.

Direction of Rotation

Clockwise from the Shaft End of the Pump (Standard)

Anticlockwise from the Shaft End of the Pump (On Request / Non Standard)

Speed of Rotation

Shaft Speed Ranging from 500 – 3600 RPM

Do not exceed 1500 RPM when pumping residual fuels, crude oil due to the presence of abrasives and contaminants.

Temperature Range:

When fitted with standard radial shaft seals, up to 90 Deg C. Depending on operating conditions, temperatures as high as 180 deg C are permissible. Please ask us !

Suction and Pressure Lines

The cross section of the suction line should be such that fluid velocity nowhere exceeds 1 m/sec. In the pressure line velocity should not exceed 5 m/sec.

Pressure Relief Valve

All the pumps may be obtained with or without pressure relief valve, which we supply at your option as by-pass valve, connected to the suction chamber, or as a return valve connecting the fluid by a separate connection to the tank. When a large quantity should have to pass through the valve for more than 10 seconds, a return valve has to be fitted, to avoid an undue rise in temperature.


The pump must be protected against solid particles in the fluid by suitable suction filters. The mesh width should be 0.1 mm and care has to be taken that even with a contaminated filter the admissible suction lift capability is not exceeded.

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