Rexroth A4VG series Piston pump
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REXROTH A4VG Series Variable Displacement Piston Pump – Specifications & Model Explanation
1. Model Explanation
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The series is mainly used in closed-loop hydrostatic transmission systems, with optional control modes to match different load requirements.
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Models compatible with high-temperature and high-dust working conditions adopt corrosion-resistant seals and cast iron housings to enhance durability.
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Optional integrated accessories include overflow valves, balance valves, and flushing valves, which need to be specified in the configuration code during selection.
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Interface specifications support SAE flanges and threaded ports; the specific type is indicated by the middle section of the model.
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A4VG: Series identifier (closed-loop variable displacement piston pump)
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56: Rated displacement (56 cm³/r)
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DA2D2: Control mode (double-acting proportional control with pressure compensation)
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32R: Interface specification (32 series flange, right-hand rotation)
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NZF02F021S: Configuration code (integrated safety valve, standard installation)
2. Core Specifications
2.1 Displacement Range
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Standard Models: 40 cm³/r to 180 cm³/r (rated displacement at maximum swashplate angle)
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Stepless Adjustment: Displacement is continuously adjustable via swashplate angle, adapting to variable flow demand.
2.2 Operating Pressure
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Nominal Pressure: 32 MPa (4641 PSI)
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Peak Pressure: 40 MPa (5802 PSI) (short-term operation, ≤5 minutes)
2.3 Speed Range
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Rated Speed: 1500 – 2500 rpm
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Minimum Stable Speed: ≥100 rpm (no cavitation)
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Maximum Allowable Speed: 3000 rpm (continuous operation)
2.4 Other Key Parameters
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Noise Level: ≤70 dB (at rated speed and pressure)
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Working Temperature: -20℃ to 90℃ (hydraulic oil temperature)
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Hydraulic Oil Compatibility: Mineral oil, synthetic hydraulic oil (meets DIN 51524 standard)
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Drive Shaft Load Capacity: Radial load ≤ 2500 N; Axial load ≤ 1000 N
3. Product Features
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Closed-Loop Design: Optimized for hydrostatic transmission systems, minimizing oil leakage and improving energy efficiency compared to open-loop pumps.
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Multiple Control Modes: Supports pressure compensation control (DR), power control (LR), and electric proportional control (EO2), meeting diverse system control requirements.
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Robust Construction: Cast iron housing and high-precision swashplate ensure stable operation in harsh conditions such as high pressure, high dust, and vibration.
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Integrated Accessories: Optional built-in valves reduce pipeline complexity and installation space, enhancing system reliability.
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Global Compliance: Meets ATEX, CE certifications, suitable for industrial and mobile equipment in global markets.
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Wide Application: Ideal for construction machinery, mining equipment, port cranes, and metallurgical machinery 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.
