Rexroth A7VO series hydraulic pump
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REXROTH A7VO Series Hydraulic Pump – Specifications & Model Explanation
1. Model Explanation
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The series is primarily applied in open-loop hydraulic systems, with flexible control modes to adapt to diverse load and speed regulation demands of industrial and mobile equipment.
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Constructed with cast iron housings and high-wear-resistant seals, it excels in harsh working environments involving high temperature, heavy dust, and strong vibration, ensuring extended service life.
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Optional integrated components include pressure relief valves, check valves, and control cylinders, which must be specified in the configuration code during model selection to meet system-specific needs.
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Interface specifications cover SAE flanges and metric threaded ports, with the specific type clearly indicated in the middle segment of the model code.
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A7VO: Series identifier (open-loop swashplate-type axial piston variable pump)
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55: Rated displacement (55 cm³/r, at maximum swashplate angle)
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DR: Control mode (pressure-compensated proportional control, manual override available)
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63R: Interface & rotation direction (63 series SAE flange, right-hand rotation)
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VZB01: Configuration code (standard mounting, no integrated valve, general-purpose seal)
2. Core Specifications
2.1 Displacement Range
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Standard Models: 20 cm³/r to 500 cm³/r (covering A7VO20, A7VO28, A7VO55, A7VO107, A7VO250, A7VO500, etc.)
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Stepless Adjustment: Displacement is continuously adjustable via swashplate angle, enabling precise flow control to match variable system demands.
2.2 Operating Pressure
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Nominal Pressure: 35 MPa (5076 PSI) for medium-displacement models; 32 MPa (4641 PSI) for large-displacement models (≥250 cm³/r)
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Peak Pressure: 40 MPa (5802 PSI) (short-term operation, ≤10 minutes, non-recurrent)
2.3 Speed Range
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Rated Speed: 1800 – 2500 rpm (varies slightly by displacement)
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Minimum Stable Speed: ≥80 rpm (without cavitation, ensuring smooth startup at low speed)
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Maximum Allowable Speed: 3000 rpm (continuous operation for models ≤160 cm³/r); 2800 rpm for models >160 cm³/r
2.4 Other Key Parameters
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Noise Level: ≤72 dB (at rated speed and nominal pressure, lower than industry average)
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Working Temperature: -25℃ to 95℃ (hydraulic oil temperature; recommended 15℃ – 60℃ for optimal performance)
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Hydraulic Oil Compatibility: Mineral oil (meets DIN 51524), synthetic hydraulic oil, and biodegradable hydraulic oil for eco-friendly applications
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Drive Shaft Load Capacity: Radial load ≤ 3000 N; Axial load ≤ 1200 N (protecting shaft bearings from excessive stress)
3. Product Features
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Open-Loop Optimization: Tailored for open hydraulic systems, featuring excellent oil suction performance and stable flow output, suitable for equipment requiring independent oil tank circulation.
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Diversified Control Modes: Supports pressure compensation control (DR), flow control (LR), electric proportional control (EP), and manual control, adapting to both manual operation and automated control systems.
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Robust & Durable Structure: High-precision swashplate, hardened cylinder block, and wear-resistant plungers ensure reliable operation under high-pressure and heavy-load conditions, with low maintenance requirements.
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Efficient Power Transmission: Advanced hydraulic design minimizes internal leakage, achieving energy efficiency of over 90% at rated working conditions, reducing energy consumption.
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Global Certification & Compatibility: Complies with CE, UL, and ISO standards, compatible with international hydraulic system configurations, suitable for global industrial and mobile equipment markets.
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Wide Application Scope: Ideal for construction machinery (excavators, loaders), agricultural machinery, metallurgical equipment, and heavy-duty industrial hydraulic systems.
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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.
