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Which series of hydraulic oil should be used when operating the Parker PV series piston pumps? After understanding the technical parameters of these pumps, we also have recommendations regarding the hydraulic oil that should be used with them. So, what are the recommended hydraulic oils for use with Parker PV series piston pumps? Let’s start with the parameters of the Parker PV series piston pumps from Autos: Series: Parker PV series piston pumps; Models: PV016, PV020, PV023, PV032, PV040, PV046, PV063, PV080, PV092, PV140, PV180, PV270. Operating pressure: Rated pressure of 35 MPa, peak pressure of 42 MPa. Control method: Equipped with a standard pressure regulator as well as a power regulator. Features: l The installation format complies with the VDMA-24560 standard; l Standard installation format: ISO 3019/2 4-hole flange (metric); l Optional installation format: ISO 3019/1 4-hole flange (SAE); l The control piston features a large displacement and a strong return spring, ensuring fast response times. Due to the pressure-relieving function of the compensation system, the peak pressure at zero flow rate is reduced. It maintains a stable compensation and regulation capability even under low pressure conditions; the minimum compensation pressure is 12–15 bar. The plunger design, along with the use of new pre-compression volume technology, reduces flow fluctuations to an unprecedentedly low level. The robust pump body structure, optimized using FEM analysis, helps to reduce noise levels. It features full variable control capabilities, as well as a shaft-driven design that delivers 100% of the nominal torque. Pumps of the same specifications, type, and almost all those with identical metric or SAE mounting flanges can be combined for use. This hydraulic pump is designed for open-loop systems and is of the swashplate-type axial piston design driven by a shaft; it can be used either individually or in combination with multiple pumps. Recommended hydraulic oil: High-quality mineral-based hydraulic oils are recommended, such as HLP oils that meet the requirements of DIN 51524 Part 2. For general purposes, the Brugger value is required to be greater than 30 N/mm2 ； For heavily loaded hydraulic equipment and hydraulic systems with rapid cycling and/or heavy dynamic loads, it must be greater than 50 N/mm2; the determination of the Brugger value shall comply with the provisions of DIN 51347-2. For details, please refer to document HY30-3248/UK \"Hydraulic Fluids for Parker PV Series Axial Piston Pumps\". Viscosity: Under normal operating conditions, the viscosity of the oil should be between 16 and 100 mm2/s (cSt); the maximum allowable viscosity during startup is 800 mm2/s (cSt). Filtering requirements: To enable the hydraulic pump and other hydraulic components in the system to function optimally and to extend their service life, effective filtering measures must be applied to the working fluid in order to protect the system from contamination. The cleanliness of the oil is evaluated using the ISO solid particle contamination grades specified in ISO 4406:1999, and the oil is filtered and purified with filters; the quality of these filter elements must comply with the relevant ISO standards. For general hydraulic systems, the oil contamination level required to ensure their satisfactory operation should not be higher than 20/18/15 as specified in ISO 4406:1999. To ensure a long service life for hydraulic components, the contamination level of the oil shall not be higher than 18/16/13 as specified in ISO 4406:1999. Seals: Consult the technical specifications for the hydraulic fluid and check its chemical compatibility with the sealing materials. Check the applicable temperature range of the sealing material and compare it with the temperature range of the system operation and the surrounding environment. N-butadiene rubber –40 … +90°C. Note: The highest oil temperature will be at the drain port of the hydraulic pump, and it can be 25°C higher than the temperature in the tank. Technical features: • Low noise • Fast response • User-friendly operation • High self-priming speed • Compact design • Shaft drive configuration with 100% nominal torque