The main working parts of a single screw pump are composed of a sleeve (stator) with a double-headed spiral cavity and a single-headed eccentric screw (rotor) meshed with it in the stator cavity. Since the medium of a single screw pump is pushed axially and evenly to flow, the internal flow velocity is low, the pressure is stable, and no eddy current or agitation is generated; it is suitable for conveying high viscosity, containing solid particles or high fiber, and requiring continuous and stable pressure.
One of the twin-screw, three-screw, and five-screw pumps is an active screw, which is a right-handed convex screw, and the rest are driven screws, which are left-handed concave screws. When the screw rotates, the volume of the suction chamber increases and the pressure decreases. The liquid enters the suction chamber along the suction pipe under the action of the pressure difference between the inside and outside of the pump. As the screw rotates, the liquid in the sealed chamber moves continuously and evenly along the axial direction to the discharge chamber. As the volume of one end of the discharge chamber gradually decreases, the liquid is discharged.
A twin-screw pump is an externally meshed screw pump, which uses two screws that mesh with each other and do not contact each other to pump liquid. The unique structure enables it to realize non-stirring, non-pulsating and stable conveying of various media; because the pump body structure ensures that the pumping liquid is always present in the working element of the pump as a sealing liquid, the twin-screw pump has a strong self-priming ability, and its special design also ensures that the pump has a high suction performance, that is, a very small NPSHr value.
The three-screw pump is mainly composed of a bushing fixed in the pump body, an active screw inserted in the pump cylinder, and two driven screws meshing with it. Since the two driven screws mesh symmetrically with the active screw, the radial force acting on the active screw of the three-screw pump is completely balanced, and the active screw does not bear bending load. The radial force on the driven screw is supported by the pump cylinder bushing along its entire length, and no bearing is required at the outer end, and it basically does not bear bending load. The remarkable features of the three-screw pump are simple structure, small pressure pulsation, stable flow, stable and reliable operation, high speed, low noise, high efficiency, long life, and self-priming ability.
Wide pressure and flow range;
Wide range of types and viscosities of transported liquids;
High speeds can be used because the rotating parts in the pump have low inertia;
Good suction performance and self-priming ability;
Uniform and continuous flow, low vibration and low noise;
Less sensitive to incoming gas and dirt than other rotary pumps;
Solid structure and easy installation and maintenance.
What is Seepex BN75-6L? Seepex BN75-6L is a technologically advanced screw pump designed for conveying viscous fluids and media containing solid particles. The pump uses the principle of a screw pump to push the fluid to the discharge end through a rotating screw. It has a simple structure and is easy to maintain, making it…
Parameters Brand: SEEPEX Performance: high pressure Weight: 760kg Pressure: 1.2Mpa Transport medium: industrial sewage Voltage: 380V Pump shaft position: horizontal Flow rate: 69m3/h Application: booster pump Impeller suction mode: single suction Lift: 120m Material: cast steel Drive mode: electric Working pressure: 1.2 Model: BN130-12 Seepex Brand Overview Founded in the last century, Seepex focuses on…
Parameters Design features seepex BN100-12L adopts a unique design concept, making full use of the structural characteristics of the screw pump, while ensuring stability and durability, taking into account flexibility and versatility. Its unique BN100-12L rotor and BN100-12L stator structure can ensure stable and efficient delivery of liquid media of various viscosities under various working…
Overview seepex BN70-12L adopts an advanced modular design, and uses detachable parts for quick and easy maintenance and repair. Daily maintenance can be completed without disassembling the entire pump body, greatly improving the service life and operating efficiency of the pump. The pump body is made of corrosion-resistant materials, which can not only withstand harsh…
Technical parameters Drive mode: Electric Lift: 60m Output flow: 200 Model: BN10-12 Weight: 80kg Conveying medium: Clean water pump Efficiency: 98% Material: Stainless steel Flow rate: 2.6-12 (m3/h) Pump shaft position: Horizontal Discharge diameter: DN50 (mm) Application: Metering pump Performance: Wear-resistant Number of impellers: Single stage Suction diameter: DN65 (mm) Working temperature: Normal temperature Brand:…
Technical parameters Pump shaft position: Horizontal Suction diameter: DN100 (mm) Power: 7.5kW Model: BN52-12 Conveying medium: Clean water pump Speed: 276 (rpm) Weight: 100kg Material: Cast iron Performance: Wear-resistant Lift: 60m Output flow: 200 Application: Chemical pump Drive mode: Electric Flow rate: 10-60 (m3/h) Efficiency: 98% Working temperature: Normal temperature Brand: SEEPEX Number of impellers:…
Parameters Technical features: reliable and durable The technical features of seepex BN5-12L include: Wide application areas Chemical industry: seepex BN5-12L can be used to transport various chemicals, fats, spices and other liquids. Especially suitable for fluids with high viscosity and particles. Food industry: seepex BN5-12L can be used to transport high-viscosity food raw materials such…
Parameters Key components: stator and rotor The core components of the BN2-12L pump are the stator and rotor. The BN2-12L stator is spiral-shaped and has a rubber lining inside. The BN2-12L rotor consists of two gears that rotate in the stator cavity with precision. When the pump is running, the rotor gears will bite the…
Parameters Introduction The seepex BN35-12 rotor is made of high-quality stainless steel, which has excellent wear resistance and corrosion resistance. The seepex BN35-12 stator is made of high-molecular polymer material, which has wear resistance, corrosion resistance and good sealing performance. Application areas seepex BN35-12 is a medium-sized single screw pump, which is widely used in…
NM021BY01L06B is a high-performance single screw pump, widely used in chemical, pharmaceutical, food and other industries where precise metering and delivery of various fluids are required. Netzsch NM021BY01L06B Progressing Cavity Pump – Precision Design and Superior Performance NM021BY01L06B single screw pump is a high-quality pump product developed by Netzsch for the transportation of high-viscosity fluids….
