NACHI Variable Vane Pump VDR-2A-1A2-13 Parameters

Basic Information

• Model: VDR-2A-1A2-13
• Type: Variable Volume Single Vane Pump
• Series: VDR 13 Design Series (improved from old 11/12 design series with mounting interchangeability, pump size 2)
• Mounting Method: Foot Type Mount (denoted by “A” in the model)
• Flow Characteristic: Constant Discharge Type (denoted by “A” in the model)
• Design Number: 13
• Ring Size: 1 (corresponding to pressure adjustment range code “2”)

Technical Specifications

• Capacity (Displacement): 25 cm³/rev
• No-Load Discharge Rate:
  • 1000 min⁻¹: 25 ℓ/min (6.6 gpm)
  • 1200 min⁻¹: 30 ℓ/min (7.9 gpm)
  • 1500 min⁻¹: 38 ℓ/min (10.0 gpm)
  • 1800 min⁻¹: 45 ℓ/min (11.9 gpm)
• Pressure Adjustment Range: 1.5 to 3.5 MPa (15.3 to 35.7 kgf/cm²), equivalent to 217 to 508 psi
• Allowable Peak Pressure: 14 MPa (143 kgf/cm²), equivalent to 2030 psi
• Revolution Speed Range: 800 to 1800 min⁻¹
• Weight: 21 kg (46.3 lb)

Key Features

• Energy-efficient and economical operation, with built-in high-precision pressure compensation structure to minimize power loss, especially at full cutoff, which is a prominent advantage of the VDR 13 design series.
• High-precision instantaneous response, ensuring prompt on-off and off-on operation for stable and accurate performance in various industrial hydraulic systems, supported by NACHI’s exclusive mechanisms.
• Low noise operation even in the high-pressure range, achieved by optimized journal bearings and improved suction/discharge port configurations, reducing vibration during operation.
• Compact design with small volume, and the input proportional to pressure does not increase, effectively preventing oil temperature rise, suitable for space-constrained installation scenarios.
• Durable construction with specially selected materials and exquisite workmanship, and it can eliminate the need for relief valves and unloading valves in the circuit, simplifying the hydraulic system structure.

Note