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Overview
Three screw pump is one of the important types of fluid transfer equipment used for lubrication, non-abrasive oil based liquid, it is also referred to as triple screw pump, three spindle pump or three rotor pump.
This pump is a positive displacement pump that transfers fluid amounts through cavities of several shape. The pumping elements consist of three moving parts: the power rotor (main screw) and two symmetrically opposed idler rotors‚ all operating within close fitting housing bores. The screws are also matched with the three inset holes, several sealed moving chambers are thereby formed in between the pump inlet and outlet end. These closed chambers will take the medium inside to move from the inlet end axially and let flow pressurized progressively, to have a continuous, constant, axial flow pressured liquid.
SN series three screw pump is designed with radial symmetric flange structure; in other words, we can rotate the pump body axial 180 degree for changing the fluid flow direction.
We can apply several mechanical and bearing combinations according to temperature and characteristics of fluid. U2 plan is structure which uses single end face mechanical seal and internal bearing, because the bearing can be lubricated by the fluid and the temperature of the fluid is up to 80℃. E6.7 plan is structure which uses single end face mechanical seal and external bearing, because the bearing cannot be lubricated by the fluid or the temperature of the fluid is up to 150℃. E15 Plan is structure which uses metal bellows mechanical seal and external bearing, because the bearing cannot be lubricated by the fluid or the temperature of fluid is up to 250℃.
The matching length of the screws is near twice the lead length, so the differential pressure is up to 40 bar.
There are many specifications such as SN40, SN80, SN120, SN210, SN280, SN440, SN660, SN940, SN1300, SN1700, SN2200, SN2900, SN3600, SN5300, SN7400, SN9400. The Arabic numeral part represents the rated displacement of the pump at 1450 speed (the helix angle is 46 degrees).
Pumps within the same specification can also be changed by different helix angle to fully match the delivery flow and pressure conditions of customers, such as 36, 38, 40, 42, 44, 46, 50, 52, 54 degrees.
Optimize design structure:
Beneficial Features:
• More economical- Minimize life cycle cost
• Reliable performance –The screw adopts high hardness nitriding steel
• Gentle product handling - Continuous conveying, small pressure pulsation
• Easy maintenance –Do not need to remove pipeline when replacing insert or screws
• Process flexibility - Low inlet pressure requirement and a wide range of operating speeds
• Reduced noise levels - Operating principle virtually eliminates pressure fluctuations
• Self priming- Doesn’t need other Forced feeding device
Meet your Transportation demands include:
• various sizes for flow rates up to 9400 L/min
• differential pressures up to 40 bar
• The viscosity of mediums from 1 to 760 cst
• working temperature up to 250℃
• liquid with a higher viscosity could also be pumped after heating up (lowering down the viscosity)
• standard mechanical seal
• heating jacket optional
• rectangular inlet optional
• adjustable direction of inlet or outlet
• Sub models: SNH(Horizontal layout), SNF(Flange connection) and SNS(Vertical basement fix) types
Strict quality standards and test procedures assure that you receive the best performing single screw pumps. Even after the initial sale we continue to provide support to ensure optimum performance in various service conditions.
Overview
Three screw pump is one of the important types of fluid transfer equipment used for lubrication, non-abrasive oil based liquid, it is also referred to as triple screw pump, three spindle pump or three rotor pump.
This pump is a positive displacement pump that transfers fluid amounts through cavities of several shape. The pumping elements consist of three moving parts: the power rotor (main screw) and two symmetrically opposed idler rotors‚ all operating within close fitting housing bores. The screws are also matched with the three inset holes, several sealed moving chambers are thereby formed in between the pump inlet and outlet end. These closed chambers will take the medium inside to move from the inlet end axially and let flow pressurized progressively, to have a continuous, constant, axial flow pressured liquid.
SN series three screw pump is designed with radial symmetric flange structure; in other words, we can rotate the pump body axial 180 degree for changing the fluid flow direction.
We can apply several mechanical and bearing combinations according to temperature and characteristics of fluid. U2 plan is structure which uses single end face mechanical seal and internal bearing, because the bearing can be lubricated by the fluid and the temperature of the fluid is up to 80℃. E6.7 plan is structure which uses single end face mechanical seal and external bearing, because the bearing cannot be lubricated by the fluid or the temperature of the fluid is up to 150℃. E15 Plan is structure which uses metal bellows mechanical seal and external bearing, because the bearing cannot be lubricated by the fluid or the temperature of fluid is up to 250℃.
The matching length of the screws is near twice the lead length, so the differential pressure is up to 40 bar.
There are many specifications such as SN40, SN80, SN120, SN210, SN280, SN440, SN660, SN940, SN1300, SN1700, SN2200, SN2900, SN3600, SN5300, SN7400, SN9400. The Arabic numeral part represents the rated displacement of the pump at 1450 speed (the helix angle is 46 degrees).
Pumps within the same specification can also be changed by different helix angle to fully match the delivery flow and pressure conditions of customers, such as 36, 38, 40, 42, 44, 46, 50, 52, 54 degrees.
Optimize design structure:
Beneficial Features:
• More economical- Minimize life cycle cost
• Reliable performance –The screw adopts high hardness nitriding steel
• Gentle product handling - Continuous conveying, small pressure pulsation
• Easy maintenance –Do not need to remove pipeline when replacing insert or screws
• Process flexibility - Low inlet pressure requirement and a wide range of operating speeds
• Reduced noise levels - Operating principle virtually eliminates pressure fluctuations
• Self priming- Doesn’t need other Forced feeding device
Meet your Transportation demands include:
• various sizes for flow rates up to 9400 L/min
• differential pressures up to 40 bar
• The viscosity of mediums from 1 to 760 cst
• working temperature up to 250℃
• liquid with a higher viscosity could also be pumped after heating up (lowering down the viscosity)
• standard mechanical seal
• heating jacket optional
• rectangular inlet optional
• adjustable direction of inlet or outlet
• Sub models: SNH(Horizontal layout), SNF(Flange connection) and SNS(Vertical basement fix) types
Strict quality standards and test procedures assure that you receive the best performing single screw pumps. Even after the initial sale we continue to provide support to ensure optimum performance in various service conditions.
