According to different oil supply mechanisms, straight-axis swash plate plunger pumps can indeed be divided into pressure oil supply type and self-priming oil type. Below is a brief description of each category: 1. Pressure oil supply type: In the pressure oil supply type, the pump relies on an external pressure oil source to lubricate and cool the internal parts of the pump. This type of pump does not have its own built-in oil supply system. Instead, it is connected to an external hydraulic circuit or system that provides the necessary pressurized oil. An external oil supply ensures continuous lubrication and cooling of the pump's moving parts, resulting in smooth operation and reduced wear and friction. 2. Self-priming type: On the other hand, the self-priming type of the straight-axis swash plate plunger pump has a built-in oil supply system. It is designed to draw oil from a reservoir or sump within the pump itself. This self-priming capability eliminates the need for an external pressurized oil supply. The pump generates suction and draws oil from its internal oil reservoir, ensuring continuous lubrication and cooling of the pump components. This pump is self-contained and can operate independently without relying on an external oil source. It should be noted that the choice of pressure supply oil type and self-priming oil type depends on specific application requirements and system design. Each type has different advantages and caveats. Pressure-fed pumps are typically used in applications where a separate hydraulic system supplies pressurized oil. Self-priming oil pumps are typically used where self-sufficiency and simplicity is required, or where there may be limitations in integration with an external oil supply. 3. External oil regulation: In the pressure oil supply type, since the pump relies on an external pressure oil source, it may also benefit from an external oil regulation system present throughout the hydraulic system. These systems can include oil filtration, cooling and other conditioning elements that help maintain the cleanliness and temperature of the oil. By utilizing external oil conditioning, the pump's internal components can experience increased reliability and longevity. 90-R-130-HF-1-NN-80-R-4-C8-F-05-GBA-26-26-22 90R130HF1NN80R4C8F05GBA262622 90R130-HF-1-NN-80-R-4-C8-F-05-GBA-26-26-22 90R130HF1NN80R4C8F05GBA262622 90-R-130-HF-1-NN-80-R-3-F1-F-04-GBA-32-32-20 90R130HF1NN80R3F1F04GBA323220 90R130-HF-1-NN-80-R-3-F1-F-04-GBA-32-32-20 90R130HF1NN80R3F1F04GBA323220 90-R-130-HF-1-NN-80-R-3-C8-F-03-GBA-35-35-24 90R130HF1NN80R3C8F03GBA353524 90-R-130-HF-1-NN-80-L-3-F1-H-00-GBA-32-32-24 90R130HF1NN80L3F1H00GBA323224 90R130-HF-1-NN-80-L-3-F1-H-00-GBA-32-32-24 90R130HF1NN80L3F1H00GBA323224 90-R-130-HF-1-DE-80-R-3-F1-H-03-GBA-38-14-24 90R130HF1DE80R3F1H03GBA381424 90R130-HF-1-DE-80-R-3-F1-H-03-GBA-38-14-24 90R130HF1DE80R3F1H03GBA381424 90-R-130-HF-1-CD-80-S-4-F1-F-03-GBA-20-20-20 90R130HF1CD80S4F1F03GBA202020 4. Independent operation: The self-priming oil type has the advantage of being independent, which means that it does not need a separate oil supply system or connection to an external hydraulic circuit. This can be beneficial in applications where space, simplicity or mobility are important factors. Self-priming oil pumps are often used in smaller hydraulic systems, mobile equipment, or where the availability of an external oil supply may be limited or impractical. 5. Initial start-up: When using a self-priming oil pump, it is very important to ensure proper start-up during initial start-up or after a long shutdown. Priming is the process of filling the pump's internal reservoir or sump to ensure adequate lubrication and cooling. If not primed properly, the pump may experience starvation, causing increased wear and possible damage to its components. 6. Maintenance precautions: The maintenance requirements of pressure oil supply type and self-priming oil type pumps may be different. Pressure-fed pumps may require periodic inspection and maintenance of the external oil supply system, including filters, coolers and associated components. Self-priming oil pumps, on the other hand, may require attention to the internal oil reservoir, including regular checks for proper oil level, contamination and cleanliness. 7. Application suitability: The choice of pressure oil supply type and self-priming oil type depends on the specific requirements and restrictions of the application. Pressure oil supply pumps are often used in industrial environments where existing hydraulic systems supply oil under pressure. Self-priming oil pumps are ideal for small systems, stand-alone equipment, or applications where an external oil supply is not feasible or desirable. It is important to refer to the manufacturer's guidelines and recommendations to determine the type of pump that is best suited for a particular application. Danfoss and other manufacturers provide detailed specifications and guidelines to help users choose the right pump for their system requirements and operational needs. 8. System Integration: The choice between the two types may also depend on the level of integration required within the hydraulic system. Pressure-fed pumps can be more easily integrated with existing hydraulic systems because they can be connected to an external oil supply. Self-priming oil pumps, on the other hand, offer a more self-contained solution that can simplify system design and installation, especially in compact or stand-alone applications. 9. Operating conditions: The operating conditions of the hydraulic system will affect the choice between the two types. Pressure-feed pumps are suitable for applications where a steady and controlled oil supply is readily available. They may be preferred in systems with higher requirements for continuous operation, such as in industrial machinery. On the other hand, self-priming oil pumps are suitable for applications where external oil supply is not readily available or where intermittent operation is required. 10. Ease of installation: When considering the installation process, pressure oil supply type pumps may require additional piping and connections to integrate them with the external oil supply system. This adds to the complexity of the installation process and may require specialized knowledge or skills. Self-priming oil pumps are self-contained and generally offer an easier installation process because they require no external oil connections. 90-R-130-HF-1-CD-80-R-4-F1-H-00-GBA-32-32-24 90R130HF1CD80R4F1H00GBA323224 90R130-HF-1-CD-80-R-4-F1-H-00-GBA-32-32-24 90R130HF1CD80R4F1H00GBA323224 90-R-130-HF-1-CD-80-R-3-C8-F-03-GBA-32-32-26 90R130HF1CD80R3C8F03GBA323226 90R130-HF-1-CD-80-R-3-C8-F-03-GBA-32-32-26 90R130HF1CD80R3C8F03GBA323226 90-R-130-HF-1-CD-80-L-4-F1-H-03-GBA-29-29-24 90R130HF1CD80L4F1H03GBA292924 90R130-HF-1-CD-80-L-4-F1-H-03-GBA-29-29-24 90R130HF1CD80L4F1H03GBA292924 90-R-130-HF-1-BC-80-S-4-F1-H-03-GBA-17-17-24 90R130HF1BC80S4F1H03GBA171724 90R130-HF-1-BC-80-S-4-F1-H-03-GBA-17-17-24 90R130HF1BC80S4F1H03GBA171724 90-R-130-HF-1-BC-80-S-4-C8-F-03-GBA-29-29-20 90R130HF1BC80S4C8F03GBA292920 90R130-HF-1-BC-80-S-4-C8-F-03-GBA-29-29-20 90R130HF1BC80S4C8F03GBA292920 11. Portability and Mobility: Self-priming oil pumps have advantages in mobile or portable hydraulic systems where the availability of an external oil supply may be limited or impractical. These pumps can operate independently and are suitable for applications requiring mobility, such as construction equipment or agricultural machinery. 12. Cost considerations: The cost of the pump and the entire hydraulic system may be a factor in choosing between the two types. Pressure-fed pumps may require additional components and piping for an external oil supply system, which increases overall system cost. Self-priming oil pumps are self-contained and may have lower initial costs and potentially lower installation costs. It is important to evaluate the specific requirements, constraints and operating conditions of the hydraulic system in order to make an informed decision as to whether a pressure-fed or self-priming pump is most suitable. Manufacturers such as Danfoss provide technical specifications and application guidelines to assist in selecting the appropriate pump type for a given system. To sum up, the choice of pressure oil supply type or self-priming oil type for straight shaft swash plate plunger pump depends on the consideration of factors such as system integration, operating conditions, ease of installation, portability and cost. Each type has different advantages and considerations, and choosing the right type can ensure the best performance and reliability of the hydraulic system.