Italian ATOS gear pump PFG-128 in stock

Brand

ATOS/Italian Atos

ATOS gear pumps from Italy feature integrated gears and shafts, achieved through a full-body hardening process for extended service life. The "D"-type bearing incorporates a forced lubrication mechanism, allowing polymer to pass through the bearing surface and return to the pump inlet side, ensuring effective lubrication of the rotating shaft. This characteristic reduces the possibility of polymer retention and degradation. The precision-machined pump body allows for a precise fit between the "D"-type bearing and the gear shaft, ensuring the gear shaft remains aligned and preventing gear wear. The Parkool seal structure, combined with a PTFE lip seal, forms a water-cooled seal. This seal does not actually contact the shaft surface; its sealing principle involves cooling the polymer to a semi-molten state to form a self-sealing effect. Alternatively, a Rheoseal seal can be used, which has reverse spiral grooves machined on the inner surface of the shaft seal, allowing the polymer to be back-pressurized back to the inlet. For ease of installation, the manufacturer has designed an annular bolt mounting surface for compatibility with flange mountings on other equipment, simplifying the manufacture of cylindrical flanges. The PEP-II gear pump comes with a heating element matched to the pump specifications, available as an option for users, ensuring rapid heating and heat control. Unlike pumps heated internally, damage to these components is limited to a single plate and is unrelated to the entire pump.

The structure of the Italian ATOS gear pump is very simple. Its most basic form consists of two identical gears meshing and rotating within a tightly fitted housing. The housing's interior is shaped like an "8," housing the two gears with their outer diameter and sides tightly fitted to the housing. Material from the extruder enters between the two gears at the inlet, filling this space. As the gears rotate, the material 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 simultaneously, thus the liquid is expelled. 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 for each revolution of the pump. 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).

The Italian 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 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 discharge port of a gear pump depends entirely on the resistance at the pump outlet.

The Italian 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 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 discharge port of a gear pump depends entirely on the resistance at the pump outlet. A gear pump is a rotary pump that transports or pressurizes liquid by the change and movement of the working volume formed between the pump cylinder and the meshing gears. The structure of an external gear pump: A pair of meshing gears and a pump cylinder separate the suction chamber and the discharge chamber. As the gears rotate, the inter-tooth volume at the point where the gear teeth disengage gradually increases, the pressure decreases, and liquid enters the inter-tooth space under the pressure difference. With further gear rotation, 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, 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 experience significant 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.

Italian ATOS gear pump spot inventory list:

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 primarily deals with European and American brands, and can source brands from any European country. For example, its key 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: Henstler, Murr, Schmersal, Samson, EPRO (Emerson Group)

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

British brands: Norgren

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