ATOS gear pump PFG-211/D in stock
$361.28
The Italian ATOS gear pump contains a sealed chamber with through-holes at different locations, each connecting to a different oil pipe. Inside the chamber is a piston, flanked by two electromagnets. When the coil of one electromagnet is energized, the valve body is attracted to that side. Controlling the movement of the valve body opens or closes different drain holes. The inlet hole is always open, allowing hydraulic oil to enter different drain pipes. The oil pressure then pushes the piston in the cylinder, which in turn moves the piston rod, which in turn drives the mechanical device. Thus, controlling the flow of current to the electromagnets controls the mechanical movement.
Brand
ATOS/Italian Atos
ATOS Gear Pump Routine Engineering Maintenance
The structure of the ATOS gear pump is very simple; its most basic form consists of two gears of similar dimensions meshing and rotating within a tightly fitted housing. The interior of this housing is shaped like an "8," housing the two gears, whose outer diameter and sides fit tightly into the housing. Material from the extruder enters between the two gears at the inlet and fills this space. As the gears rotate, it moves along the housing and is finally discharged when the two gears mesh. Technically, a gear pump is also called a positive displacement device, much like a piston in a cylinder. When one gear enters the fluid space of another, the liquid is mechanically squeezed out. Because liquid is incompressible, the liquid and the gears cannot occupy the same space at the same time, thus the liquid is expelled. Due to the continuous meshing of the gears, this phenomenon occurs continuously, thus providing a continuous discharge volume at the pump outlet. The ATOS pump discharges the same amount per revolution. As the drive shaft rotates continuously, 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, thus preventing 100% fluid discharge from the outlet. Therefore, a small amount of fluid loss is inevitable. However, the pump can still operate well, achieving 93%–98% efficiency for most extruded materials. This type of pump is not significantly affected by fluids whose viscosity or density varies during the process. If a damper is present, such as a filter or restrictor on the outlet side, the pump will force the fluid through them. If this damper changes during operation—for example, 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 system is reached (usually equipped with a torque limiter).
ATOS Gear Pump Daily Maintenance:
1. Starting:
(1) Before starting, check the sealing of all pipeline flanges and joints.
(2) Rotate the coupling; there should be no friction or collision noise.
(3) When starting, inject the pumping liquid into the pump.
(4) Before starting, fully open the valves in the suction and discharge pipelines; starting with valves closed is strictly prohibited.
(5) After verifying the motor's rotation direction, start the motor.
2. Stopping:
(1) Turn off the motor.
(2) Close the pump's inlet and outlet valves.
The ATOS gear pump is a type of positive displacement pump. It consists 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 the liquid. The volume of the space on the meshing side decreases, forcing the liquid into the pipeline. The suction chamber and discharge chamber are separated by the meshing line of the two gears. The pressure at the pump outlet depends on the resistance at the pump outlet. A gear pump is a rotary pump that transports or pressurizes liquids by relying on the change and movement of the working volume formed between the pump cylinder and meshing gears. The structure of an external meshing double gear pump consists of a pair of meshing gears and a pump cylinder separating the suction chamber and the discharge chamber. As the gears rotate, the volume between the teeth at the point where the gear teeth disengage gradually increases, the pressure decreases, and liquid enters the space between the teeth under the pressure difference. With the rotation of the gears, the liquid between each tooth is carried to the discharge chamber. At this point, the volume between the meshing teeth at the point of engagement gradually decreases, discharging the liquid. Gear pumps are suitable for transporting 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 transporting various oils. Gear pumps have a simple and compact structure, are easy to manufacture and maintain, and have self-priming capability, but they experience 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 caused by the outlet pressure exceeding the permissible value due to any reason, such as blockage of the discharge pipe.
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PFG-211
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