Overview

The VT6BB is a high-performance vane pump designed for hydraulic applications. It features various porting options, shaft types, and volumetric displacements. However, it is not recommended for use if internal leakage exceeds 50% of the theoretical flow.

Specifications

• Volumetric Displacement: Ranges from 5.8 cm³/rev (0.35 in³/rev) up to 45.0 cm³/rev (2.75 in³/rev), with multiple intermediate sizes (B02 to B14 series).
• Port Connections: Multiple SAE and metric options including 2" SAE 4 bolt (metric and UNC), 3/4" SAE 4 bolt (metric and UNC), and SAE 12 (1 1/16"-12 UNF-2B).
• Shaft Types: Splined (Code 3) and Keyed (Code 1, non-SAE).
• Seal Classes: S1 for mineral oil, S4 and S5 for fire-resistant fluids and mineral oil.
• Maximum Pressure Ratings: Up to 210 bar (3000 psi) for most series; B12 rated max 210 bar, B14 max 175 bar.
• Maximum Axial Load: 800 N (180 lbs).
• Speed Range: Typical operating speeds up to 2800 rpm, with performance data provided at 1200, 1500, 1800, and 2500 rpm.

Operating Characteristics

Performance data includes input power (kW), flow rates (lpm and gpm), and pressure differentials at various operating pressures (0, 7, 140, 175, 210, 240 bar). The pump’s hydromechanical power loss and internal leakage are characterized at 24 cSt fluid viscosity.

• Input power and flow rates are tabulated for different volumetric displacements and pressures.
• Internal leakage increases with pressure and viscosity; typical leakage values are provided in lpm and gpm.
• Hydromechanical power loss is the sum of losses from each section at operating pressure differentials.

Limitations and Warnings

• Do not operate the pump if internal leakage exceeds 50% of theoretical flow.
• Maximum permissible axial load is 800 N.
• Do not operate the pump for more than 5 seconds at any speed or viscosity condition that exceeds specifications.
• Maximum pressure limits vary by series; exceeding these can cause damage.

Mechanical Details

• Shaft Torque Limits: Provided in ml/rev x psi and ml/rev x bar units, with maximum torque values specified for different shaft codes.
• Shaft Dimensions: Detailed dimensions for keyed and splined shafts, including spline teeth count, pressure angle, major diameter, and hole patterns.
• Porting Combinations: Multiple porting configurations (e.g., P1, P2, S) with corresponding connection dimensions and bolt patterns.

Noise and Hydromechanical Losses

• Noise levels are given in dB(A) for different pump configurations and speeds.
• Hydromechanical power loss data is provided to assist in efficiency calculations.

Recommendations and Best Practices

• Ensure correct porting and shaft type selection based on application requirements.
• Monitor internal leakage regularly to avoid operating beyond safe limits.
• Use appropriate seal classes depending on fluid type (mineral oil or fire-resistant fluids).
• Adhere strictly to maximum pressure and axial load limits to ensure pump longevity.
• Follow recommended speed and viscosity ranges to prevent premature wear or failure.