The energy-efficient design of Nash dry claw vacuum pumps - The NDC Series - provides dependable and effective performance. Used in a wide range of industrial applications, Nash dry claw pumps operate in a dry, non-contacting manner due to extremely tight machining tolerances. As a result, no lubricant or sealant is required, friction is minimized, and required maintenance is minimal. Harsh-duty versions are available with a protective coating, inlet filter, condensate drain in silencer, and flushing capabilities, among other standard features. Compact design and application-specific versions make the NDC series ideal for OEM requirements.

NASH Dry Claw Vacuum Pump (NDC) Series 

Nash specializes in dry claw technology and provides a wide range of dry vacuum pumps packaged as bare pumps, pre-engineered or engineered-to-order systems. Engineered-to-order systems are custom designed to meet customer process requirements. Pre-engineered packages are available for quick shipment with plug & play installation. NASH dry claw vacuum pumps & systems offer significant process and economic benefits. Dry technology provides lower installation expenses, easier maintenance, low running costs, and reduced environmental impact while providing a more flexible vacuum. 

Dry Claw Vacuum Pump Advantages

Dry claw vacuum pumps offer great advantages for industrial applications. With a robust and durable design and low-maintenance requirements, claw vacuum pumps are engineered for high performance in tough environments. Other advantages include: 

  • Quiet Operation
  • Low Maintenance and Cost of Ownership
  • Energy-Efficient
  • Variable Speed Drive (VSD) Compatible
  • Passive and Active Cooling Options
  • Reduced Footprint 

How Dry Claw Vacuum Pumps Work 

Inside dry claw vacuum pumps, two claw-shaped rotors turn in opposite direction inside the cylinder wall. These rotors operate without the aid of a sealing fluid and in a non-contacting manner due to the tight machining tolerances and their unique claw shape. As the claw-shaped rotors move, they expand a volume of air at the inlet of the pump, carrying that volume around the outside of the pumping chamber, and then compressing that volume out of the exhaust. The shape of the claw maximizes transport volume per cycle while effectively timing the opening and closing of the suction and exhaust channels against expansion and contraction of that volume. 

Applications for Dry Claw Vacuum Pumps

Vacuum technology is required in a considerable number of applications - plastic extrusion, drying, bottling, packaging, and within central hospital systems worldwide. Claw pumps are offered in a wide range of standard sizes and can be engineered-to-order for specific applications and considerations. Dry claw vacuum pumps are sometimes used in tandem with booster pumps but can be used alone when high vacuum or slower pumpdown rates are allowed. These pumps are a preferred choice in the following applications:  

  • Thermoforming 
  • Milking Parlors 
  • Water and Sewage Handling 
  • Pick and Place 
  • Water Drying 
  • Medical Systems 
  • Printing and Paper Converting