VICKERS 20V Series Vane Pump Technical Parameters

1. Basic Specifications

• Model: VICKERS 20V Series (20V14A, 20V21A, 20V29A, 20V35A, 20V42A – main sub-models)
• Pump Type: Fixed Displacement Vane Pump (double-vane design, open circuit), suitable for medium-pressure hydraulic systems
• Application: Industrial and Mobile Hydraulic Systems (machine tools, plastic machinery, construction equipment, agricultural machinery, hydraulic power units, etc.), mainly used for providing stable hydraulic flow for actuators
• Design Feature: Compact structure, low noise operation, high volumetric efficiency, stable performance, easy maintenance, and compatible with most hydraulic fluids; adopts anti-wear vane and rotor design to extend service life
• Volumetric Efficiency: ≥93% (at rated pressure and speed); Mechanical Efficiency: ≥95%

2. Performance Parameters

• Geometric Displacement (per sub-model):
  • 20V14A: 14.0 cm³/rev (0.854 in³/rev)
  • 20V21A: 21.0 cm³/rev (1.282 in³/rev)
  • 20V29A: 29.0 cm³/rev (1.770 in³/rev)
  • 20V35A: 35.0 cm³/rev (2.136 in³/rev)
  • 20V42A: 42.0 cm³/rev (2.564 in³/rev)
• Maximum Operating Pressure:
  • Continuous Duty: 172 bar (2500 psi)
  • Intermittent Duty: 207 bar (3000 psi) (maximum 5 minutes per hour)
• Speed Range:
  • Maximum: 1800 rpm (at 0 inlet pressure)
  • Minimum: 600 rpm (to ensure stable vane operation)
  • Recommended: 1000-1800 rpm for optimal efficiency and service life
• Output Flow (at 1800 rpm, no load):
  • 20V14A: ~25.2 LPM (6.66 US GPM)
  • 20V21A: ~37.8 LPM (10.0 US GPM)
  • 20V29A: ~52.2 LPM (13.8 US GPM)
  • 20V35A: ~63.0 LPM (16.6 US GPM)
  • 20V42A: ~75.6 LPM (19.9 US GPM)
• Fluid Requirements:
  • Fluid Types: Petroleum-based antiwear hydraulic oil (ISO VG 32, 46, 68), synthetic hydraulic fluids (with compatibility verification)
  • Viscosity Range: 10-400 cSt (at operating temperature), optimal 20-60 cSt
  • Inlet Pressure: -0.02 to 0.1 MPa (-0.29 to 1.45 psi); avoid negative pressure to prevent cavitation
• Oil Temperature Range: -10°C to 80°C (14°F to 176°F), maximum short-term 90°C (194°F)
• Noise Level: ≤65 dB(A) (at 1800 rpm, rated pressure)

3. Installation & Structural Parameters

• Mounting Flange: SAE “A” 2-bolt type (SAE J744-68-2) or SAE “B” 4-bolt type (optional for large-displacement models)
• Shaft Rotation: Clockwise (R, standard) or Counterclockwise (L, optional) when viewed from the drive end
• Shaft Extension Type:
  • Standard: 19.05 mm (0.75 in) diameter straight keyed shaft (20V14A/20V21A); 25.4 mm (1.00 in) diameter straight keyed shaft (20V29A/35A/42A)
  • Optional: Splined shaft (SAE 14-tooth) for high-torque applications
• Shaft Seal: Single lip seal (standard Buna N); optional fluorocarbon (Viton) seal for high-temperature or harsh environments
• Main Ports:
  • Suction Port: 3/4″ SAE O-ring port (20V14A/20V21A); 1″ SAE O-ring port (20V29A/35A/42A)
  • Pressure Port: 1/2″ SAE O-ring port (20V14A/20V21A); 3/4″ SAE O-ring port (20V29A/35A/42A)
  • Drain Port: 1/4″ SAE O-ring port (standard)
• Operating Weight:
  • 20V14A/20V21A: ~4.5 kg (9.9 lbs)
  • 20V29A/35A: ~5.8 kg (12.8 lbs)
  • 20V42A: ~7.2 kg (15.9 lbs)
• Mounting Orientation: Horizontal (preferred); vertical (shaft-up) optional with proper inlet pressure

4. Maintenance & Other Parameters

• Oil Cleanliness Requirement: ISO 16/14/12 or cleaner (NAS 7 or better) to extend vane and bearing life
• Filtration Recommendation: 10 μm absolute filter for pressure line; 25 μm filter for suction line
• Service Interval: 2000 operating hours (oil change); 5000 operating hours (vane and seal inspection)
• Design Number: 50 (standard for 20V series), installation dimensions consistent across sub-models
• Special Options:
  • High-temperature seal kit (Viton) for oil temperature above 80°C
  • Anti-cavitation valve for low inlet pressure conditions
  • Double shaft seal for wet mounting applications
• Maximum Input Power:
  • 20V14A: ~7.5 kW (10.1 HP) at 1800 rpm, 172 bar
  • 20V21A: ~11.2 kW (15.0 HP) at 1800 rpm, 172 bar
  • 20V29A: ~15.4 kW (20.6 HP) at 1800 rpm, 172 bar
  • 20V35A: ~18.7 kW (25.1 HP) at 1800 rpm, 172 bar
  • 20V42A: ~22.4 kW (30.0 HP) at 1800 rpm, 172 bar

5. Model Coding Explanation (20V21A-1P13S-1C20)

• 20V: Series Identifier (20V = fixed displacement vane pump)
• 21/29: Nominal Displacement (21 = 21 cm³/rev, 29 = 29 cm³/rev)
• A: Vane Material (A = standard anti-wear vane)
• 1P: Mounting Flange (1P = SAE “A” 2-bolt)
• 13S/11L: Shaft Type and Rotation (13 = straight keyed shaft, S = clockwise, L = counterclockwise)
• 1C: Port Position (1C = standard port position)
• 20/50: Design Number (20/50 = standard design for 20V series).