A90 series yuken Variable piston pump
Youyan A series variable piston pumps have a wide range of displacement, ranging from 10cm3/rev to 219cm3/Rev. Common displacement includes: A10, A16, A22, A37, A56, A70, A90, A145
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1. Model Nomenclature
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A90: Series identifier, indicating the A90 series variable displacement piston pump, corresponding to a geometric displacement of 91.0 cm³/rev.
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FR: Control mode, representing pressure compensator type (a common control mode for A90 series, optional electro-hydraulic proportional load-sensitive control mode as well).
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01: Control type code, representing pressure compensation control type (04 for electro-hydraulic proportional load-sensitive control).
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BS: Shaft end and seal configuration, customized according to application scenarios, with “S” indicating side interface and “HS” representing high-pressure seal design.
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60: Design number, a common version identifier for A series piston pumps, used to mark the iteration version of the product.
2. Core Technical Parameters
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Parameter Item
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Specification
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Unit
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Geometric Displacement
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91.0
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cm³/rev
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Minimum Adjustable Flow
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36
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cm³/rev
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Rated Operating Pressure
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28 (4060 psi)
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MPa
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Maximum Intermittent Pressure
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32 (4640 psi)
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MPa
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Shaft Speed Range
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600 – 1800
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r/min
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Approximate Mass (Foot Mounting)
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68.0 – 78.0
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kg (149.9 – 172.0 lbs)
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Rotation Direction
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Clockwise (from shaft end, counterclockwise optional on request)
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–
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Control Type
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Pressure Compensator Type (optional electro-hydraulic proportional load-sensitive control mode)
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–
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Material
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Austempered Ductile Iron or High-Strength Alloy Steel (key components)
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–
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3. Hydraulic Fluid Requirements
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Fluid Type: Petroleum-based oils, such as anti-wear hydraulic oils (HM type) or R&O (Rust and Oxidation Inhibitor) type hydraulic oils equivalent to ISO VG 32 or 46. Synthetic ester-based hydraulic oils (HEES type) are recommended for high-temperature working conditions.
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Viscosity Range: 20 – 400 mm²/s (98 – 1800 ssu); the viscosity should not exceed 1600 mm²/s during low-temperature startup.
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Temperature Range: 0 – 60 °C (32 – 140 °F); for high-temperature environments above 80 °C, customized high-temperature seals are required.
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Contamination Control: The degree of contamination should be maintained within NAS Grade 9. The suction port must be equipped with a filter of at least 100μm (150 mesh) to ensure the cleanliness of the hydraulic fluid and the stable operation of the pump.
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Process steps：
Customer inquiry: Customers will make inquiries before placing an order to understand product details and communication needs.
Quotation: According to customer needs, provide a formal quotation, including the name, model, quantity, delivery time, payment method, etc. of the goods.
Order confirmation: After the customer confirms the quotation, a formal purchase order will be placed.
Confirm the delivery time: communicate the delivery time with the production department, inform the factory of the order details, and arrange the production plan.
Sign an export contract: After the two parties confirm that it is correct, sign an export contract to establish a trade relationship.
Implement the letter of credit (if applicable): If the payment method of the letter of credit is used, the customer needs to be urged to issue the certificate and review the contents of the letter of credit.
Export stocking: According to the requirements of the contract and the letter of credit, arrange production, purchase raw materials and packaging, and prepare the goods.
Chartering and booking: Contact the freight forwarder to make a booking and arrange the transportation of goods.
Export inspection: Apply to the quality inspection department for export commodity inspection and provide relevant documents.
Apply for a write-off slip: apply for a write-off slip from the foreign exchange management department for subsequent foreign exchange write-off.
Export declaration: Declare exports to the customs and provide documents such as power of attorney for customs declaration, customs declaration form for export goods, commercial invoice, packing list, etc.
