Overview

This document provides detailed technical specifications, operating characteristics, mounting instructions, and performance data for the VT7QDCC high-performance vane pump series.

1. Designations and Codes

• Rotation Direction: R = Clockwise, L = Counter-clockwise.
• Seal Classes: 00 = Standard, 4 = S4 (fire resistant fluids), 5 = S5 (mineral oil and fire resistant fluids), 1 = S1 (mineral oil).
• Flow Direction: 'Y' = Bi-directional cold start, 'B' = Bi-directional, '0' = Uni-directional.
• Shaft Types: 3 = Splined (SAE C), 2 = Keyed (SAE CC), 4 = Splined (SAE CC), 1 = Keyed (no SAE).
• Porting Combinations: Various codes (e.g., 003/B03/Y03) correspond to specific porting configurations.

2. Volumetric Displacement and Flow Parameters

The pump series offers a range of volumetric displacements from approximately 10.8 cm³/rev (0.66 in³/rev) up to 157.9 cm³/rev (9.64 in³/rev). Key displacement codes include B14 (43.9 cm³/rev), B28 (89.9 cm³/rev), B31 (99.1 cm³/rev), B35 (113.4 cm³/rev), B42 (137.5 cm³/rev), 045 (145.7 cm³/rev), and 050 (157.9 cm³/rev).

Flow rates and input power are provided for various operating pressures (0 to 300 bar / 0 to 4350 psi) and speeds (up to 2500 rpm), with typical fluid viscosity at 24 cSt.

3. Operating Characteristics

• Pressure Ratings: Maximum internal pressures vary by model, e.g., B35-B38 up to 280 bar (4060 psi), B42 up to 260 bar (3770 psi), 045 up to 240 bar (3500 psi), and 050 up to 210 bar (3000 psi).
• Speed Limits: Some models (025, 028, 031) have a maximum speed of 2500 rpm.
• Internal Leakage: Internal leakage should not exceed 50% of theoretical flow; operation at such leakage levels is limited to 5 seconds maximum.
• Hydromechanical Power Loss: Typical losses are charted against pressure and speed, indicating efficiency considerations.
• Noise Levels: Noise data is provided for triple pump configurations at various pressures and speeds, measured in dB(A) per ISO 4412.

4. Mechanical and Mounting Specifications

• Mounting Torque: Specified mounting torques range from approximately 50 ft.lbs (74.7 Nm) to 138 ft.lbs (187 Nm) depending on shaft type and mounting configuration.
• Shaft Codes and Types: Detailed shaft codes correspond to keyed or splined shafts with SAE standards, including dimensions, pressure angles, and tooth counts.
• Permissible Loads: Maximum axial load permissible is 1200 N (270 lbs).
• Mounting Dimensions: Precise dimensions for shaft diameters, keyways, bolt holes, and depths are provided for accurate installation.

5. Recommendations and Limitations

• Do not operate pumps with internal leakage exceeding 50% of theoretical flow for more than 5 seconds.
• Ensure correct seal class selection based on fluid type (mineral oil vs. fire resistant fluids).
• Observe maximum pressure and speed ratings for each pump model to avoid damage.
• Follow specified mounting torque values to ensure secure installation without damaging components.

6. Summary Tables and Data Highlights

The document includes extensive tabulated data correlating volumetric displacement, flow rates, input power, pressure ratings, and mechanical dimensions. Key performance parameters are given for typical operating conditions (24 cSt fluid viscosity, 1800 rpm speed) to aid in pump selection and system design.

Hydromechanical power loss and internal leakage charts provide insight into efficiency and maintenance considerations.

Conclusion

This technical document serves as a comprehensive reference for engineers and technicians specifying, installing, and operating the VT7QDCC vane pump series. It emphasizes correct configuration, operating limits, and mechanical installation details to ensure optimal pump performance and longevity.