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Liquid Ring Vacuum Pump 
Medium Capacity, Vectra XL

Capacity 30 to 5,200 ACFM (50 to 8,900 m3/h)

The NASH Vectra liquid ring vacuum pump and compressor series delivers optimum performance with unprecedented production efficiencies. Designed to stand up to harsh environments in the chemical and oil & gas industries, the Vectra XL is available in 12 models and offers capacity ranging from 30 to 5,200 ACFM (50 to 8,900 m3/hr).


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Engineered for Demanding Environments

Vectra XL pumps and compressors are designed to stand up to the harsh environments found in the chemical process and oil & gas industries.

  • Engineered to excel in applications that require discharging against a positive back pressure

  • Available in both ductile iron and stainless steel

  • Can accommodate a variety of mechanical seals

The Vectra XL series meets high combustible range standards and at ATEX certified. These vacuum pumps and compressors are in accordance with guidelines 94/9/EG, category 1 and 2 and were designed with API 681 specifications in mind. 

Easy to Maintain - Low Total Cost of Ownership

The Vectra XL pump was engineered to be easy to maintain, with improvements that optimize performance and reliability.

  • External mechanical seals for flexibility and ease of maintenance

  • Pump body is engineered to reduce forces on the pump shaft

  • Lobe purges reduce erosion wear

Operates as a vacuum pump and compressor with a discharge pressure range of 43.5 psia (3 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. 

Reliable and Efficient with Proven Performance

Based on proven reliable NASH conical liquid ring pump designs, the Vectra series delivers superior performance and reliability through several engineering upgrades.

  • Improved cone angles, which decrease the size of the pump,

  • NASH patented Gas Scavenging Technology dramatically improves pump performance at high vacuum levels


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


Factory Service

Strategically located to provide support where and when you need it.



Built to our legendary standards using current designs and specifications. Fit and performance guaranteed.

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Field Service

Our team of NASH Certified Technicians are available to supplement your in-house maintenance operations.

Technical Data

  • Suction Capacity: 30 to 5,200 ACFM (50 to 8,900 m3/h)

  • Vacuum Range: to 1 inHgA (to 33 mbar abs.)

  • Discharge Pressure Range: 43.5 psia (3 bar abs.)

  • Differential Pressure: to 29 psi (to 2 abs.)

  • Shaft Seals: Stuffing Box (standard), Mechanical Seals (single acting/ double acting) or Cartridge on request

  • Materials of Construction: Ductile Iron, Stainless Steel

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