Single Screw Pump

A screw pump is a rotary pump that relies on the volume change and movement of the meshing space formed by the pump body and the screw to transport liquid or increase its pressure. Screw pumps are divided into single screw pumps, double screw pumps and three screw pumps according to the number of screws. When the active screw rotates, it drives the driven screw that meshes with it to rotate together, and the volume of the screw meshing space at one end of the suction chamber gradually increases, and the pressure decreases. The liquid enters the meshing space volume under the action of the pressure difference. When the volume increases to form a sealed chamber, the liquid moves continuously along the axial direction in each sealed chamber until it reaches one end of the discharge chamber. At this time, the volume of the screw meshing space at one end of the discharge chamber gradually decreases, and the liquid is discharged. The working principle of the screw pump is similar to that of the gear pump, except that the screw replaces the gear in structure. The table shows the characteristics and application range of various screw pumps. The flow and pressure pulse of the screw pump are very small, the noise and vibration are small, and it has self-priming ability, but the screw processing is more difficult. The pump has two structures: single suction and double suction, but the single screw pump only has single suction. The pump must be equipped with a safety valve (single screw pump does not need to be equipped) to prevent the pump or prime mover from being damaged due to some reasons such as blockage of the discharge pipe, which causes the pump outlet pressure to exceed the allowable value.

Single Screw Pump

Single screw pump is a rotary positive displacement pump. They work according to the positive displacement principle. The interference fit of the single-helix metal rotor and the double-helix elastic stator forms sealed cavitites. When the rotor moves inside the stator, the liquid moves in the axial direction from the suction port to the discharge port.

G series single screw pump is a name for progressive cavity pump in China, and it is also the earliest single screw pump in China.

Its structure is mainly a progressive cavity pump with bearing seat, and in China he has two types.

1. Without reducer
It is mainly used in sewage treatment and low viscosity medium transportation; Such pumps are usually mass-produced, so the price is often very advantageous.

2. With reducer (That is, progressive cavity pump with bearing seat.)
It is often used in the working conditions of large flow, high viscosity, poor fluidity and high pressure.

G series single screw pump is horizontally mounted and flanged joint.
Shaped lines are designed with small eccentricity, medium lead, which increase the life of the bushing, and reduce leakage with long sealing lines.
The lead of the bushing of different stages is unchanged, only the length of the bushing is changed, and the injection capacity of the pump of different stages is unchanged.

Without reducer

► Simple structure
►Stable operation
►Packing / mechanical seal
►Transport medium with good fluidity, poor abrasiveness and low viscosity.
►Large stock
►Fast delivery
►Cheapness

product-600-291

With ducer

► High pressure stability
►Strong structure
►Low noise
►Long life cycle
►High efficiency
►Suitable for all kinds of media with high viscosity and solid particles
►The size can be customized according to your requirements.

Products Description

Type: G type Single Screw Pump
Material：Cast iron/Stainless steel
Flow: 0-150m3/h;
Lift: 0-240m;
Power: 0.75-37kw;
Speed: 500-960r/min;
Caliber: 20-135MM;
Temperature: -15-200℃

Products Advantages

Using a G-Type Single Screw Pump offers several advantages, including:

► Gentle Product Handling: The pump's design ensures minimal product degradation and shear, preserving the quality and integrity of the pumped substance.
► High Volumetric Efficiency: The pump's positive displacement mechanism delivers consistent flow rates, even when handling varying viscosities or pressures.
► Self-Priming Capability: The pump can self-prime and handle air or gas entrainment, minimizing the need for additional priming equipment.
► Wide Operating Range: The G-Type Single Screw Pump can handle a broad range of viscosities, from low to high, making it suitable for a diverse range of fluids.
► Low Noise and Vibration: The pump operates quietly and with minimal vibration, providing a comfortable working environment.

Products Applications

The G Type Single Screw Pump is widely used in various industries due to its versatility. Some common applications include:

◆ Food and Beverage Industry: The pump is suitable for transferring viscous food products, such as chocolate, creams, sauces, and dairy items.
◆ Chemical and Petrochemical Industry: It can handle corrosive chemicals, adhesives, resins, and solvents effectively.
◆ Oil and Gas Industry: The pump is utilized for crude oil transfer, drilling mud circulation, and other applications requiring precise fluid control.
◆ Pharmaceutical Industry: It is suitable for transferring pharmaceutical ingredients, ointments, creams, and other viscous products.

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