Overview

The document provides detailed technical specifications, operating characteristics, and mechanical data for the High Performance Vane Pump model VT7QDCB. It covers various configurations, volumetric displacements, shaft types, mounting options, and performance parameters.

1. Specifications

• Model Variants: VT7QDCB with multiple volumetric displacements ranging from approximately 5.7 cm³/rev (0.35 in³/rev) to 157.9 cm³/rev (9.64 in³/rev).
• Shaft Types: Includes splined shafts (SAE CC and SAE C), keyed shafts (non-SAE), with direction options clockwise (R) or counter-clockwise (L).
• Mounting Flanges: SAE C 2-bolt and J744c flange options.
• Seal Classes and Fluids: Seal classes S1, S4, S5 for mineral oil and fire-resistant fluids.
• Maximum Operating Pressures: Typical maximum internal pressures are 210 bar (3000 psi) and 240 bar (3500 psi) depending on configuration.

2. Volumetric Displacement and Porting

The pump offers a wide range of volumetric displacements identified by codes (e.g., B02, B10, B38) with corresponding cm³/rev and in³/rev values. Porting combinations are referenced for different configurations (P1, P2, P3), with metric and UNC thread options for ports.

3. Operating Characteristics

• Input Power: Power consumption data is provided for various displacements at 24 cSt viscosity and 1800 rpm speed, with power values in kW and hp.
• Pressure Ratings: Performance curves and data are given for pressures ranging from 0 to 300 bar (0 to 4350 psi).
• Speed Range: Typical operating speeds include 1200, 1800, and 2500 rpm.
• Internal Leakage: Typical internal leakage rates are shown, with a caution not to operate the pump for more than 5 seconds if leakage exceeds 50% of theoretical flow.
• Hydromechanical Power Loss: Losses are tabulated and graphed for different operating pressures and speeds.

4. Mechanical and Mounting Data

• Maximum Axial Load: 1200 N (270 lbs).
• Permissible Radial Load: Specified for shaft types and operating conditions.
• Shaft Torque Limits: Detailed torque limits are provided for different shaft codes and configurations.
• Shaft Dimensions: Includes spline details such as teeth count, pressure angle, flat root side fit, and key dimensions for SAE and SAE CC splined shafts.
• Mounting Torque: Recommended mounting torques are 138 ft-lbs (187 Nm) and 50 ft-lbs (68 Nm) depending on the component.

5. Noise Levels

Noise levels are provided for triple pump configurations at various pressures and speeds, measured in dB(A). Noise increases with pressure and speed, with typical values ranging from 60 to 80 dB(A).

6. Recommendations and Limitations

• Do not operate the pump for more than 5 seconds at any speed or viscosity if internal leakage exceeds 50% of theoretical flow to avoid damage.
• Use appropriate seal classes depending on fluid type (mineral oil or fire-resistant fluids).
• Ensure correct shaft and mounting flange selection based on application requirements.

7. Summary of Key Parameters

Conclusion

The VT7QDCB vane pump is a versatile, high-performance hydraulic pump suitable for various industrial applications requiring precise volumetric displacement and robust mechanical design. The document provides comprehensive data to assist in selection, installation, and operation, emphasizing adherence to pressure, leakage, and load limits to ensure reliability and longevity.