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A screw pump is a rotary pump which is a form of a positive displacement pump and it delivers a known quantity of fluid for every revolution.
A screw pump is made up of various components such as; a casing, a screw (depending on the type of screw pump; it can contain 1 screw up to 5 screws), bearings, a seal, a motor adapter and a drive shaft. Screw pumps are quite simple in construction.
Model | Speed | Capacity | Pressure | Head | Power | Outlet flange | Permitted solids Dia. | Fiber length |
APG35-2 | 960rpm | 8m³/h | 1.2Mpa | 120m | 4kw | 50mm | 3mm | 40mm |
APG40-1 | 12m³/h | 0.6Mpa | 60m | 4kw | 65mm | 3.8mm | 45mm | |
APG40-2 | 12m³/h | 1.2Mpa | 120m | 5.5kw | 65mm | 3.8mm | 45mm | |
APG50-1 | 20m³/h | 0.6Mpa | 60m | 5.5kw | 80mm | 5mm | 50mm | |
APG50-2 | 20m³/h | 1.2Mpa | 120m | 7.5kw | 80mm | 5mm | 50mm | |
APG60-1 | 30m³/h | 0.6Mpa | 60m | 11kw | 100mm | 6mm | 60mm | |
APG60-2 | 30m³/h | 1.2Mpa | 120m | 15kw | 100mm | mm | mm | |
APG70-1 | 720rpm | 45m³/h | 0.6Mpa | 60m | 11kw | 125mm | 8mm | 70mm |
APG70-2 | 45m³/h | 1.2Mpa | 120m | 15kw | 125mm | 8mm | 70mm | |
APG85-1 | 65m³/h | 0.6Mpa | 60m | 15kw | 250mm | 10mm | 80mm | |
APG85-2 | 65m³/h | 1.2Mpa | 120m | 18.5kw | 150mm | 10mm | 80mm | |
APG105-1 | 145m³/h | 0.6Mpa | 60m | 22kw | 200mm | 15mm | 110mm | |
APG105-2 | 145m³/h | 1.2Mpa | 120m | 30kw | 200mm | 15mm | 110mm | |
APG135-1 | 350m³/h | 0.6Mpa | 60m | 37kw | 250mm | 20mm | 150mm | |
APG135-2 | 350m³/h | 1.2Mpa | 120m | 45kw | 250mm | 20mm | 150mm |
The screw pump, as the name implies, the form of the screw is
similar to a screw thread and hence by rotating it, the fluid moves
along the screw thread from the suction side to the discharge side
of the pump. Due to very close clearances inside the pump, the
volumetric efficiency is high especially with viscous fluids as
this reduces the amount of slippage of the fluid from the high
pressure to the low pressure side. The pump itself like any
positive displacement pump does not produce pressure, it only moves
fluid but it is the actual system which produces back pressure due
to friction loss.
Screw pumps are mostly used on fluids of a higher viscosity, moving
these fluids with screw pumps results in energy efficient and a
relatively compact machine when compared to other pump types i.e
centrifugal pump. For screw pumps with more than 2 screws, they are
normally used on lubricating fluids only because the screws are not
geared together and are relying on the fluid to lubricate the
screws.
With a twin screw pump, the screws are geared which prevent the
screws contacting each other and can therefore be used on
non-lubricating fluids, chemicals and food-stuffs etc Twin screw
pumps are capable of a higher flow rate than higher screw pump
types i.e more than 2 screws.
The main applications for a screw pump are oil based fluids, tar
bitumen, adhesives (industrial type), chemicals and dairy products.
Screw pump mainly consisted of the discharge port, the stator, the rotor, the flexible section, the middle axis, suction room, seal, bearing, driveshaft, bearing body. Among these parts, the wearing parts are the rotor and stator. The screw pump wet parts can be made of stainless, steel, and the high quality rubber. According to different fluids' content and property, we'll provide a certain configuration on screw pumps. For example, the abrasive material we kindly suggest use the special rubber instead of stainless steel. As we know, the S.S can't adapt abrasive material but corrosive material. Compared to other pumps, screw pump is not easy to lead swirl. This helps much to maintain pump capacity. It is not sensitive to viscosity so it is capable to transfer material with high viscosity
Medium is delivered continuously without agitation and pulsation.
Small vibration and low noise.
High pressure and high efficiency.
Simple structure and easy assemble.
Small volume and lightweight.
Wearable and long life.
Actually, when the screw axis is rotating, the lower Vroom will become large. Vroom will close against fluid sucked. The closed room will be pushed forward along the axle. Then a new suction cavity generates on suction end. One and one closed cavity move forward, the fluid will be pressed out.
For any question or demand, just feel free to contact AIPU solids. You will get a professional proposal very soon.