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The 2BVA Series consists of single-stage, single-acting liquid ring vacuum pumps designed for reliable industrial process-vacuum applications. Using water as the standard operating liquid, the series is particularly suitable for handling air, wet gases and gas-vapour mixtures. The product range is available in multiple mechanical configurations. The 2BVA2 and 2BVA5 sub-series feature compact direct-coupled designs, while the 2BVA6 sub-series uses an intermediate support bracket and coupling between the pump and motor, providing improved mechanical support and reduced operating vibration. With an ultimate pressure down to 3300 Pa under specified test conditions, relatively low operating-liquid consumption and available cavitation-protection configurations, the 2BVA Series provides a compact and versatile solution for general industrial vacuum applications.
Working Principle
The 2BVA Series operates on the liquid-ring principle. An eccentrically mounted impeller rotates inside the pump chamber containing a controlled amount of operating liquid, typically water. Centrifugal force forms the operating liquid into a rotating liquid ring along the inner wall of the casing. Because the impeller and liquid ring are eccentric to each other, the spaces between adjacent impeller blades and the liquid ring continuously change in volume. As the chamber volume increases, gas is drawn into the pump. As the volume decreases, the gas is compressed and discharged through the outlet. The operating liquid also absorbs part of the heat generated during compression, resulting in relatively low gas-temperature rise and making the pump particularly suitable for handling wet gases and gas-vapour mixtures. Vacuum performance is influenced by the temperature and vapour pressure of the operating liquid. Lower operating-liquid temperatures generally improve achievable vacuum and pumping performance.
Key Features
Configuration Options
2BVA2 Sub-series
Compact Direct-Coupled Design
Compact direct-coupled configuration for smaller pumping capacities, providing simple installation and a reduced footprint.
2BVA5 Sub-series
Compact Direct-Coupled Design
Direct-coupled configuration for medium and higher pumping capacities, combining compact construction with simple installation and maintenance.
2BVA6 Sub-series
Coupling & Support-Bracket Design
The pump and motor are connected through a coupling with an intermediate support bracket, providing improved mechanical support and reduced operating vibration.
Cavitation Protection
Cavitation-protection configurations are available to help reduce cavitation risk when the pump operates at low inlet pressures. Proper operating-liquid temperature, flow rate and system conditions remain important for reliable operation.
2BVA2 / 2BVA5: Direct-Coupled Design
2BVA6: Coupling-Driven Design with Intermediate Support Bracket for Reduced Vibration
Construction: Cast iron casing
2Cr13 stainless steel impeller and shaft
*Performance values are based on specified factory test conditions. Actual pumping capacity and ultimate pressure may vary with operating-liquid temperature, gas conditions and system configuration.
Typical Applications
general process vacuum for compatible non-corrosive media
industrial drying and moisture-removal processes
filtration, dewatering and liquid-handling applications
vacuum degassing and forming processes
vacuum concentration and compatible wet-process applications
reliable vacuum generation for wet-gas and vapour-handling processes
