Saylor-Beall 5 HP Splash-Lubricated Duplex Air Compressors

Saylor-Beall 5 HP Splash-Lubricated Duplex Air Compressors: 735 vs. 737 Models

Saylor-Beall’s 5 HP duplex systems are designed for high-demand industrial environments where air is a critical utility. Both models feature two 5 HP motors and two pumps mounted on a single receiver tank, utilizing an alternator control panel to balance run-time or provide simultaneous operation during peak demand.

The primary distinction between these two systems lies in the pump selection and operating speed.

Saylor-Beall 735 Duplex Series

The 735 is the standard-duty industrial configuration. It utilizes two Model 705 pumps, which are the native pumps designed for 5 HP applications.

• Performance Profile: This model is engineered to provide high CFM output while maintaining a more compact footprint than the 737.
• Operating Speed: The 705 pumps run at a higher RPM (typically around 845 RPM) to reach their rated displacement.
• Best For: General automotive shops, fabrication facilities, and industrial plants that require a reliable, American-made duplex system for standard daily operations.

Saylor-Beall 737 Duplex Series

The 737 is an “extreme-duty” configuration. It utilizes two Model 707 pumps. Because the 707 is a larger pump frame (typically used for 7.5 HP or 10 HP units), it is significantly “over-sized” for a 5 HP motor.

• Low RPM Advantage: To match the 5 HP motor output, the massive 707 pumps are slowed down to approximately 455 RPM. This lower speed drastically reduces friction, vibration, and noise.
• Thermal Efficiency: Running a larger pump at a slower speed results in much lower operating temperatures, which extends the life of valves, gaskets, and oil.
• Best For: Applications requiring 24/7 operation, facilities where noise reduction is a priority, or environments where the ultimate equipment lifespan is the primary goal.

Comparison of Specifications

Summary of Choice

• Choose the 735 for a traditional industrial-grade system that offers a lower initial purchase price and proven performance for standard shop air.
• Choose the 737 if you want a “lifetime” machine. By using an oversized pump at half the typical speed, the 737 suffers significantly less wear and tear over decades of use.