Overview
Republic offers a comprehensive range of regenerative blowers suitable for high vacuum or compressed air applications. These blowers can be mounted in both horizontal and vertical positions. They feature TEFC motors that are certified for 50/60 Hz operation and comply with cUL, UL, and CE standards. The design includes an impeller directly connected to the motor shaft, minimizing friction and enhancing air force efficiency. Bearings are positioned outside the compression chamber to ensure reliability under high differential pressure. The blowers are low-maintenance and oil-free, providing continuous and dependable service.

Performance Specifications
The performance curves are based on air at 59°F and atmospheric pressure of 29.91 inch Hg, with a tolerance of +/-10%. The total pressure differences are applicable for inlet and ambient temperatures up to 77°F. Suction capacity is related to inlet conditions, while pressure capacity is related to atmospheric conditions. For conditions outside these parameters, Republic should be contacted. Three-phase motor tolerances are +/-10% for fixed voltage motors and +/-5% for voltage range motors, while single-phase machines have a +/-5% tolerance. Frequency tolerance is +/-2% maximum.

Model Specifications
The document provides detailed specifications for models HRB 402S, HRB 402, and HRB 402/1, including air flow, rated vacuum and pressure, motor power, voltage, current, sound level, and weight. For example, the HRB 402S model operates at 50 Hz with an air flow of 88/150 CFM/m3/hr, a rated vacuum of 112/279 in. H2O/mbar, and a motor power of 2.1/1.6 HP/kW.

Available Options
Republic offers pre-assembled kits for pressure or vacuum applications, which include an inlet filter, gauge, and relief valve. Optional items include check valves, tube adaptors, washdown motors, explosion-proof motors, noise enclosures, and control panels such as VFDs, PLCs, or starter panels.

Approximate Dimensions
The document provides dimensions for each model in both inches and millimeters, detailing various parts of the blower such as the relief valve, check valve, adapter, filter, and blower itself.