NACHI Variable Vane Pump VDR-1B-2A3-22 Parameters

Basic Information

• Model: VDR-1B-2A3-22
• Type: Variable Volume Single Vane Pump
• Series: VDR 22 Design Series
• Mounting Method: Flange Type Mount (denoted by “B” in the model)
• Flow Characteristic: Constant Discharge Type (denoted by “A” in the model)
• Design Number: 22

Technical Specifications

• Capacity (Displacement): 22 cm³/rev
• No-Load Discharge Rate:
  • 1000 min⁻¹: 22 ℓ/min
  • 1200 min⁻¹: 27 ℓ/min
  • 1500 min⁻¹: 33 ℓ/min
  • 1800 min⁻¹: 40 ℓ/min
• Pressure Adjustment Range: 3 to 7 MPa (30.6 to 71.4 kgf/cm²), equivalent to 435 to 1015 psi
• Allowable Peak Pressure: 14 MPa (143 kgf/cm²), equivalent to 2030 psi
• Revolution Speed Range: 800 to 1800 min⁻¹
• Weight: 9 kg (19.8 lb)

Key Features

• Stable and highly efficient operation up to 14 MPa (2030 psi), enabled by a biased piston that minimizes ring vibration and leak-free pressure balance construction.
• High-precision instantaneous response, thanks to a special bias piston mechanism ensuring prompt on-off and off-on response.
• Silent operation even in the high-pressure range, achieved by quiet journal bearings, a 3-point support bias piston, and optimized suction/discharge port shapes.
• Reduced power loss, featuring NACHI-original mechanical innovations and precision machining, especially at full cutoff.
• Solid and durable construction, designed to withstand harsh operating conditions with specially selected materials and exquisite workmanship.