ATOS gear pump PFG-199/D in stock

Brand

ATOS/Italian Atos

ATOS gear pumps are a type of positive displacement pump, consisting of two gears, a pump body, and front and rear covers forming two enclosed spaces. When the gears rotate, the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid. Conversely, the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the pump outlet depends on the resistance at the outlet. A gear pump is a rotary pump that transports or pressurizes liquid by changing and moving the working volume between the pump cylinder and the meshing gears. The structure of an external meshing double gear pump: A pair of meshing gears and the pump cylinder separate the suction and discharge chambers. When the gears rotate, the volume between the teeth on the suction side gradually increases, the pressure decreases, and liquid enters the space between the teeth under the pressure difference. As the gears rotate, the liquid between each tooth is carried to the discharge chamber. At this point, the inter-tooth volume at the meshing point of the gear teeth on the discharge chamber gradually decreases, thus discharging the liquid. Gear pumps are suitable for conveying lubricating liquids that do not contain solid particles, are non-corrosive, and have a wide viscosity range. The pump's flow rate can reach 300 m³/h, and the pressure can reach 3 × 10⁷ Pa. It is commonly used as a hydraulic pump and for conveying various oils. Gear pumps have a simple and compact structure, are easy to manufacture and maintain, and have self-priming capability, but they have large flow and pressure pulsations and are noisy. Gear pumps must be equipped with a safety valve to prevent damage to the pump or prime mover due to reasons such as blockage of the discharge pipe causing the pump's outlet pressure to exceed the allowable value.

The structure of the ATOS gear pump is very simple; its most basic form consists of two gears of the same size meshing and rotating within a tightly fitted housing. The interior of this housing is similar to a figure "8," with the two gears housed inside. The outer diameter and sides of the gears fit tightly with the housing. Material from the extruder enters between the two gears at the suction inlet and fills this space. As the teeth rotate, it moves along the housing and is finally discharged when the two teeth mesh. In technical terms, a gear pump, also called a positive displacement device, works like a piston in a cylinder. As one gear engages with the fluid space of another, the liquid is mechanically forced out. Because liquid is incompressible, the liquid and the gear cannot occupy the same space simultaneously, thus expelling the liquid. This phenomenon occurs continuously due to the constant meshing of the gears, providing a continuous discharge rate at the pump outlet; the discharge rate is the same per revolution. With the continuous rotation of the drive shaft, the pump continuously discharges fluid. The pump's flow rate is directly related to its rotational speed. In reality, there is a small amount of fluid loss within the pump, preventing it from reaching 100% efficiency. This is because the fluid is used to lubricate the bearings and gears, and the pump body cannot be perfectly flush, so a small amount of fluid loss is inevitable. However, the pump can still operate well, achieving 93%–98% efficiency for most extruded materials. For fluids whose viscosity or density varies during the process, this type of pump is not significantly affected. If there is a damper, such as a filter or restrictor on the outlet side, the pump will force fluid through them. If this damper changes during operation—that is, if the filter becomes dirty or clogged, or the back pressure of the restrictor increases—the pump will still maintain a constant flow rate until the mechanical limit of the weakest component in the unit is reached (usually equipped with a torque limiter).

The ATOS gear pump is a type of positive displacement pump, consisting of two gears, a pump body, and front and rear covers forming two enclosed spaces. When the gears rotate, the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid, while the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends on the magnitude of the resistance at the pump outlet.

The ATOS gear pump

is a rotary pump that relies on the change and movement of the working volume

created between the pump cylinder and the meshing gears

to transport or pressurize liquids. The gear pump consists of two gears, a pump body, and front and rear covers.

Two enclosed spaces exist. When the gears rotate,

the volume of the space on the disengaged side increases, creating a vacuum that draws in liquid. Conversely, the volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction and discharge chambers are separated by the meshing line of the two gears. The pressure at the pump outlet depends on the resistance at the pump outlet.

The ATOS gear pump is driven by an independent motor, effectively blocking upstream pressure pulsations and flow fluctuations. Pressure pulsations at the pump outlet can be controlled within 1%. Using a gear pump on an extrusion production line can increase the flow output speed and reduce the shearing and residence time of material within the extruder.

External gear pumps are a widely used type of gear pump; generally, gear pumps refer to external gear pumps. Its structure, as shown in Figure 5-14, mainly consists of a driving gear, a driven gear, a pump body, a pump cover, and a safety valve. The sealed space formed by the pump body, pump cover, and gears constitutes the working chamber of the gear pump. The shafts of the two gears are respectively mounted in bearing holes on the two pump covers. The drive gear shaft extends out of the pump body and is driven by an electric motor. External gear pumps are simple in structure, lightweight, low in cost, reliable in operation, and have a wide range of applications. When the gear pump is working, the drive gear rotates with the electric motor, driving the driven gear to rotate as well. As the meshing teeth on one side of the suction chamber gradually separate, the volume of the suction chamber increases, the pressure decreases, and the liquid in the suction pipe is drawn into the pump. The sucked liquid is then pushed into the discharge chamber by the gears in two paths within the gear grooves. After entering the discharge chamber, the liquid is compressed by the continuous meshing of the two gear teeth and forced from the discharge chamber into the discharge pipe. With the continuous rotation of the drive and driven gears, the pump can continuously suck in and discharge liquid. The pump body is equipped with a safety valve. When the discharge pressure exceeds the specified pressure, the pumped liquid can automatically open the safety valve, allowing the high-pressure liquid to return to the suction pipe. ATOS gear pump

PFG-114

PFG-120

PFG-128

PFG-135

PFG-142

PFG-160

PFG-174

PFG-187

PFG-199

PFG-211

PFG-214

PFG-216

PFG-218

PFG-221

PFG-327

PFG-340

PFG-354

PFG-210

PFG-114/D

PFG-120/D

PFG-128/D

PFG-142/D

PFG-160/D

PFG-174/D

PFG-187/D

PFG-199/D

PFG-210/D PFG-211/D

PFGXF-114/D

PFGXF-120/D

PFGXF-128/D

PFGXF-142/D

PFGXF-160/D

PFGXF-174/D

PFGXF-187/D

PFGXF-199/D

PFGXF-210/D

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