NES Company Inc.


NES Company Inc. manufacturers and distributes an extensive selection of pumping equipment for the industrial, commercial, and heating markets. We specialize in Nash* liquid ring vacuum pumps. Our product lines include a large selection of replacement Nash* pumps up to 42,000 CFM, engineered systems, as well as one of the largest selection of remanufactured Nash* pumps.

Why Choose NES Company?


  • We offer an extremely broad range of liquid ring pumps and compressors with capacities ranging from 20 to over 42,000 CFM.
  • Many of our liquid ring pumps are drop-in replacement for Nash* or Siemens* classic liquid ring vacuum pumps.
  • Our remanufactured Nash* liquid ring pumps are offered with a 90% Performance and two year Guarantee against manufactuerer’s defects.
  • Many times we have the pump you require in stock which means we can often quick-ship your replacement pump quickly to anywhere in the world.
  • Our products work in a wide variety of industrial and agricultural environments. We have built custom engineered systems for a huge range of industrial applications and can offer expertise to select and design the most appropriate system for your needs.
  • We carry the most common replacement liquid ring vacuum pumps including drop-ins for Nash CL, SC and MHF series pumps as well as replacements for Siemens BE and BV series pumps. Are you running a different model? Chances are we can refurbish your existing liquid ring vacuum pump or find a custom engineered alternative.
  • All our liquid ring vacuum pumps, heat exchangers, and steam heating equipment come with 2 year warranties.
  • Many of our systems are manufactured and/or performance-tested in the USA ensuring the highest quality and reliable performance.

What sets our engineered vacuum systems apart?


  • We design our vacuum systems with the end user and the application in mind. For us this means designing and building a system that will meet the customers’ expectations for performance, durability, and life cycle cost. We take time interviewing the customer whenever possible to understand the key concerns and values of the end user. This can mean meeting a specific set of performance criteria, bolting up to an existing system, or fabricating a system under tight time constraints.
  • We can build very specialized systems with ASME code components, sensors & controls, and hybrid pumping components for high vacuum.
  • Energy consumption is a key concern with any system as running costs will almost always exceed the capital investement over the life of the system. We can work with you to reduce water usage or electrical power consumption through the use of smart water controls, heat exchangers, and high efficiency motors and controls.
  • Materials of construction are a key component to any system design. We offer systems made of cast iron, steel, many grades of stainless steel, and even titanium, Hastelloy or other exotic materials for the most demanding applications.
  • Our staff designers can help you troubleshoot your system and provide helpful suggestions for improvement or we can send a technician on site for boroscopic inspections and/or performance testing.