ATOS gear pump PFG-135 in stock

Brand

ATOS/Italian Atos

ATOS Piston Pumps, ATOS Gear Pumps, ATOS Axial Piston Pumps, ATOS Vane Pumps, ATOS Hydraulic Cylinders, ATOS Relief Valves, ATOS Proportional Valves, ATOS Stacking Valves

ATOS gear pumps are a type of positive displacement pump. They consist 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 a gear pump depends entirely on the resistance at the pump outlet.

ATOS gear pumps are a type of positive displacement pump. They consist 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 chamber and discharge chamber are separated by the meshing line of two gears. The discharge pressure of a gear pump depends on the magnitude of 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 the meshing gears to transport or pressurize liquids. The structure of an external meshing double gear pump: A pair of meshing gears and the pump cylinder separate the suction chamber and the discharge chamber. When the gears rotate, the inter-tooth volume at the point where the gear teeth disengage on the suction side gradually increases, the pressure decreases, and the 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 time, the inter-tooth volume at the point where the gear teeth mesh on the discharge side gradually decreases, and the liquid is discharged. 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. Gear pumps are simple and compact in structure, easy to manufacture and maintain, and have self-priming capability. However, 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 caused by factors such as blockage in the discharge pipe, which could lead to the outlet pressure exceeding the allowable value.

The ATOS gear pump has a very simple structure. 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 through the suction 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 gear, the liquid is mechanically squeezed out. Because liquid is incompressible, the liquid and the gears cannot occupy the same space simultaneously, thus expelling the liquid. This phenomenon occurs continuously due to the constant meshing of the teeth, thus providing a continuous discharge volume at the pump outlet; the discharge volume is the same for each pump 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, so 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 discharge side, the pump will force the fluid through it. If the damper changes during operation—that is, if the filter becomes dirty or clogged, or the back pressure of the limiter 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).

When installing an ATOS gear pump, the following points should be noted:

1. Conduct a detailed inspection of all components; all should meet the corresponding standards.

2. The perpendicularity of the two end faces of the gears to the shaft centerline and the parallelism of the two end faces of the gears should be qualified; the gear meshing should be good.

3. The shaft diameter should meet the technical requirements, and the coaxiality of the bushing or bearing with the shaft diameter should be qualified.

4. The gear end face clearance should be adjusted appropriately.

5. When tightening the end face bolts, the force should be symmetrical and even; tighten while rotating the rotor. If jamming occurs, loosen the bolts and retighten.

6. When adding packing and tightening the pressure cover, tighten while rotating the rotor; do not overtighten.

Precautions for Use (Fold Edit Section)

When using a gear pump, the following precautions should be taken:

(1) The pump drive shaft and the prime mover output shaft should be installed using a flexible coupling with a coaxiality deviation of less than 0.1 mm. For a bushing coupling, the coaxiality deviation should be less than 0.05 mm.

(2) The transmission device should ensure that the pump's drive shaft is subjected to force within the allowable range.

(3) The pump's suction height should not exceed 0.5 m.

(4) A mesh filter is usually installed at the pump's suction port, with a filter accuracy of less than 40 μm. For filters installed on the system's return oil line, the accuracy should preferably be less than or equal to 20 μm.

(5) The working oil should be strictly selected according to regulations, with a working temperature range of -20 to 80 ℃.

(6) The pump's rotation direction must be correct, i.e., the pump's inlet and outlet positions must be correct. Disassembly and assembly of the pump must be strictly performed according to the manufacturer's instruction manual. (7) Tighten the screws on the pump inlet and outlet pipe joints. Ensure the sealing devices are reliable to prevent cavitation and oil leakage, which would affect pump performance. Avoid starting the pump under load and stopping it under load.

(8) Before starting, check that the relief valve (safety valve) in the system is at its set permissible pressure.

(9) For new pumps or overhauled hydraulic pumps, perform no-load operation and a short period of overload operation before use. Then check the pump's operating condition; no leakage, impact noise, excessive heat, or excessive noise is allowed.

(10) If the pump is not used for a long time, disconnect it from the prime mover. When using it again, do not immediately use the maximum load; allow at least 10 minutes of no-load operation. 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

Our company mainly deals in European and American brands and can source brands from any European country. For example, our 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: 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