Efficient And Reliable With Proven Performance

The 905 liquid ring vacuum pump and compressor series is an upgrade to the proven 904 model and has been engineered to deliver improved performance and reliability.

The 905 provides lower life-cycle costs with an improved variable port design, enabling a wider operating range with improved efficiency, water-saving technology, and simpler seal line piping. It also includes a patented gas scavenging feature to provide superior performance and longevity at high vacuum levels.

Designed To Operate In Demanding Environments

The 905 series has been engineered for reliable operation and performance in harsh applications such as chemical processing, paper, mining, geothermal power generation, or anywhere reliable compression of corrosive gases is needed. Constructed of 316L stainless steel the 905 offers excellent corrosion resistance and can be outfitted with a variety of mechanical seals.

Operates As A Vacuum Pump & Compressor With A Discharge Pressure Range Of 30 psia (2 bar abs.)

Some applications require vacuum and compression in one process. Instead of handling the gas with two separate machines, our liquid ring vacuum pump and compressor models can do the job with only one pump - reducing cost and simplifying installation.

Conical Porting And Rotor Configuration

Patented in 1932, Nash’s variable conical porting design allows the force of compression to counter the weight of the rotor and shaft to help minimize load on bearings during operation. The variable porting optimizes pump performance across the entire operating range. With constant innovation, Nash’s patented design features:

• Option for lobe purge to minimize damage from erosion in duties with solids present
• Large differential pressure capability
• Gas scavenging feature minimizes slip of gas from discharge to inlet improving capacity, especially at deep vacuum
• High liquid carryover tolerance
• Side discharge to minimize chance of flooded start
• Self-priming design may allow elimination of booster pump in recirculated systems

Technical Data