ATOS gear pump PFG-128/D in stock

Brand

ATOS/Italian Atos

ATOS Gear Pump Working Characteristics

ATOS Gear Pump Advantages: Simple and compact structure, small size, light weight, good manufacturability, low price, strong self-priming force, insensitive to oil contamination, wide speed range, able to withstand impact loads, convenient maintenance, and reliable operation.

ATOS Gear Pump Disadvantages: Radial force imbalance, large flow pulsation, high noise, low efficiency, poor parts interchangeability, difficult to repair after wear, and cannot be used as a variable displacement pump.

Trapped Oil Phenomenon

ATOS Gear Pump Cause: During the operation of an involute gear pump, as the closed volume at the gear intersection changes over time, a portion of the hydraulic oil is often sealed between the gears, as shown in the figure. This is called trapped oil. Because hydraulic oil is incompressible, it will cause the external gears to generate significant vibration and noise, affecting the normal operation of the system.

Oil Trapping Phenomenon

Solution: Create unloading grooves on the front and rear cover plates or floating bushings. The principle for creating unloading grooves is: the distance between the two grooves should be the minimum closed volume, so that when the closed volume decreases, it communicates with the pressure chamber; when the closed volume increases, it communicates with the suction chamber.

Leakage Phenomenon

ATOS gear pumps have significant leakage. During the operation of the external gears, leakage occurs through three paths: gear tip clearance, side clearance, and meshing clearance.

Among these, end face side clearance leakage is the largest, accounting for 80%-85% of the total leakage. When the pressure increases, the former does not change, but the latter's deflection increases significantly. This is the main cause of leakage in external gear pumps, resulting in low volumetric efficiency, making them unsuitable for high-pressure pumps.

Solution: End face clearance compensation uses hydrostatic balancing measures, adding a compensating component between the gear and the cover plate, such as a floating bushing or floating side plate.

ATOS 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 high noise levels. Gear pumps must be equipped with safety valves to prevent damage to the pump or prime mover caused by the outlet pressure exceeding the allowable value due to reasons such as blockage in the discharge pipe.

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. 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 discharge pressure of the gear pump depends on the magnitude of the resistance at the pump outlet.

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. 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 discharge pressure of an ATOS gear pump depends on the resistance at the pump outlet. A gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and meshing gears to transport or pressurize liquids. 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. When the ATOS gears rotate, the inter-tooth volume at the point where the gear teeth disengage gradually increases in the suction chamber, causing the pressure to decrease, and liquid enters the inter-tooth space 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 point where the gear teeth mesh gradually decreases in the discharge chamber, 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 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.

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PFG-114/D

PFG-120/D

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PFGXF-128/D

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PFGXF-174/D PFGXF-187/D

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PFGXF-210/D

Our company mainly deals in European and American brands and can source brands from any European country. For example, our advantageous German brands include: BURKERT, DEMAG, HAWE, REXROTH, HYDAC, PILZ relays, FESTO, IFM sensors, E+H, HEIDENHAIN, P+F sensors, SICK, TURCK, and HIRSCHMANN industrial switches. German brands: Hengstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

American brands: MOOG, ASCO, MAC, NUMATICS, PARKER, VICKERS, ROSS

British brands: Norgren

Italian brands: OMAL, ATOS, CAMOZZI, UNIVER, Camozzi