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● 3gr screw pump Overview:
        Our in-depth study of foreign advanced technology, according to China's current oil and gas multiphase actual requirements developed 2W.WH external bearing double suction pump twin-screw multiphase transport and 2W.W series twin screw pump , and GB11035-89 << >> marine electric twin-screw pump manufactured in accordance with the provisions of the national standard . With the main pump by the mutual engagement of the driven screw , and the screw and the bushing hole , forming a sealed cavity in the pump body when the screw is rotated, the continuous forward movement of a sealed cavity , the sealed chamber to promote the outlet of the liquid to achieve the purpose of pumping the liquid.
● 3gr screw pump structural features:
         The double suction pump structure , screw both ends at the same pressure chamber , the axial force can be self- balancing. Externally mounted bearings at both ends , used alone lubricant (grease ) lubrication, thus not affecting transport medium between the two screw drive with a pair of synchronized gears , do not touch the tooth surface between the screw , while leaving a small gap , medium impurities does not have a direct wear ( except scour outside ) to screw the tooth surface .
 Except for some small-displacement pump outside (2w.w4.0 less ) , usually in the pump comes with the flow valve, when the discharge pressure exceeds the rating, there is a protective effect . Import and export orientation on the pump there are two , one for horizontal feed , level out ; two horizontal into the vertical upwardly ; Users can choose according to their needs .
● twin-screw pump advantages:
           1, the transmission fluid smooth , pulseless , without stirring , vibration, low noise.
 2 , has a strong self-absorption properties, when multiphase transport , gas rate is not higher than 80% , sediment concentration is not higher than 500g/m3.
3 , external bearing structure , using an independent lubrication, can transport a variety of non -lubricating media.
 4, using synchronous gear drive , no contact between the two rotors, even a short time idling anyway.
 5 , the body with a heating jacket , you can transport all kinds of clean or contain low viscosity or high viscosity medium small solid particles ( particle diameter is generally less than 0.12-0.2mm)
6 , the correct choice of materials , can be transported even many corrosive media.
 7 , double -suction structure , no axial force on the rotor.
 8 , shaft mechanical seal or bellows mechanical seal , with a long life , less leakage , for a wide range of features.
● 3gr screw pump performance range :
          A maximum working pressure of 4.0MPa
2 , flow range 1 ~ 2500m3 / h
3, the temperature range of -20 ~ 340 ℃
4 , the viscosity of the medium 1 ~ 3000mm2 / s, lower speed can reach 106mm2 / s
Medium viscosity performance on a large twin-screw pump , the pump displacement is the nominal displacement under specific conditions the viscosity , in order to ensure the pump to operate at high efficiency when the test is not sufficient , it is recommended to select the following viscosities speed:
 Medium viscosity cSt speed r / min
< 4001500
400 ~ 12001000
1200 - 3600750
For higher viscosity media , which should be used for speed and motor power , please contact our factory specialized technical personnel selection .
● 3gr screw pump application industry , for example :
        1 , oil : as oil, gas , water, micro- fine solid particles of Multiphase Pump and oil pump.
 2 , the shipbuilding industry : as a marine loading pump , bilge stripping and sewage treatment , the host lubrication pumps , fuel pumps.
 3 , petroleum chemical industry : as a variety of resins , pigments , waxes , paints, inks , latex , all kinds of oil , crude oil, heavy oil and other loading and transport pumps.
 4 , thermal power plants : as heavy oil, oil pump, oil pump hosts .
 5, the food industry : as alcohol, honey , syrup , fruit juice, animal and vegetable oils , milk, pulp oil pump.
● 3gr screw pump should pump selection key issues
 1, the lubrication medium , cleanliness , corrosivity .
 2 , medium viscosity, temperature .
 3 medium inlet and outlet pressure , mounting height.
 4 , the use of explosion-proof requirements occasions.
 5 , please indicate the specifications, models, designed for use when ordering pressure, speed , medium viscosity, temperature , electrical explosion level , media name .
 Such as : 2W.W5.0-64-J-1, 1.0MPa, 980r/min,
Media : Viscosity : 500cSt, 80 ℃, EXd2BT4
Media : heavy fuel oil.
 I hope to leave some amount of choice when the rich in order to ensure safe and reliable.
● 3gr screw pump performance parameters