Three Screw Pump

SPECIFCITIONS :

• CAPACITY : Up to 3000 lpm
• PRESSURE : Up to 40 bar
• Viscosity : 2 cst to 10,000 cst
• Cartridge Design For Flexibility
• Hydraulically Balanced Rotors

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.

Typical Liquids :

All kind of Bunker Oil,Engine Oil,Furnace Oil, Heating 011,Hydraulic Oils , High Viscosity Lubrication Oil,Mineral Oil ,Synthetic Oil,Oil Water Emulsions and Fuel Oils,Diesel Oil, LSHS , LOO.

MOC :

• Pump Housing : Carbon Steel ,Cast Iron, Stainless Steel
• Liner                  : Aluminium Alloy / Cast Iron/Copper

• Rotors

• Main Screw     : Alloy Steel, Hardened Steel and Surface Treated Steel
• Idler Screw      : Hardened Steel, Surface Treated Steel
• Shaft Sealing  : Mechanical Seal / Lip Seal with Elastomers in Viton ,  EPDM & Nit-rile / Gland Packing / Graphoil Rings
• Mounting Frames : Fabricated Steel
• Relief Valve Parts : In Steel & Cast Iron

Direction of Rotation :

Clockwise from the Shaft End of the Pump (Standard) Anticlockwise from the Shaft End of the Pump  (On Request IN on Standard)

Drive :

In general the pumps are connected with a flexible coupling to a foot or flange mounted motor. Radial loads on to the shaft end are not permissible,unless when absorbed by an additional external bearing

Suction and Pressure Lines:

The cross section of the suction line should be such that fluid velocity . In Steel & Cast Iron  now here exceeds 1m/sec.In the pressure line velocity  should not exceed 5 m/sec.

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  90DegC. Depending on operating conditions, temperatures as high as 180 deg Care permissible. Please ask us I Cooling Jacket & Heating Jacket for the pump body & covers can be provided for easing the cold start of the pump and for continuously pumping liquids  at high temperature.

Pressure Relief Valve:

All housings described here may be obtained with or without pressure relief valve,which we supply at your options by-pass valve,connected to the suction chamber, or as return valve,conducting the fluid by a separate connection to the tank.When a larger quantity should have to pass through the valve for more than 1O seconds, are turn valve has to be fitted,to avoid an due rise in temperature.

Viscosity:

Normal range 21,5 to 385 est.Depending on type, pressure,speed and suction conditions, fluids with viscosity ranging from 6 to 3800 est may be pumped.Regarding viscosity out side the normal range.

Important:

Please state complete working condition when inquiring for a pump:

• Fluid to be pumped   
• Pressure
• Viscosity  
• Operating Temperature
• Capacity 
• Suction lift or inlet pressure