Montenegro (EN)

Many companies use rotary vane vacuum pumps in filling applications because of their low initial cost, small footprint, and ability to operate without water. However, due to the regular maintenance required on rotary vane pumps, their lifecycle costs far exceed those of liquid ring vacuum pumps. 

NASH liquid ring vacuum pumps are oil-free, require little maintenance, and are well-known for their reliability. They excel as the vacuum source in filling operations because the liquid is an intrinsic part of the pump and any carryover from the filling system is easily handled with no reduction in performance or production.

Liquid Ring Advantages For Bottle Filling Under Vacuum


  • Continuous operation
  • Increased operating efficiency
  • Reduced operating costs 

One Moving Part 

  • Reduced downtime in harsh operating conditions or locations
  • Reduced maintenance costs 

Various Materials of Construction 

  • Satisfy many industrial application requirements

How it works

Typical Applications For Bottle Filling Under Vacuum

NASH vacuum is used to evacuate the air from bottles just before they are filled with the desired
beverage. The benefits of applying vacuum are two-fold. First, it reduces the time required to fill the bottle, which increases throughput. The other reason vacuum is applied is to remove oxygen from the bottle, which could react with the beverage and compromise the taste and aroma of the drink.

Container Filling Sequence

The container filling sequence consists of the following steps:

  • Creating a vacuum in the container
  • Flushing CO2 to remove air from the container
  • Pressurizing the container
  • Filling the container
  • Level out
  • Depressurizing the container
  • Sealing the container 
Vacuum Filler

Vacuum Filters

These fillers draw a vacuum on an overflow container and attach a hose from the filling head and from the head to the product.  The vacuum system removes air from the container, which in turn induces the flow of product into the bottle. The product fills to the level of the vacuum vent, and any surplus is drawn into the overflow system. This method is not effective on plastic bottle filling, but is still used for glass bottles and is especially common when filling products like nail polish.

Counter-Pressure Fillers

These fillers are unique to the carbonated beverage industry.  There are three parts to the heads of these fillers: vent, CO2 pressurized, and fill tube. The purpose of the CO2 is to keep the already existing carbonized beverage in solution and to minimize foaming. 

Counter Pressure Fillers

The counter-pressure fillers process contains the following steps:

  • The head seals and the vent and CO2 pressure valves are opened
  • Air is forced out of the bottle and replaced with the heavier CO2
  • The vent is then stoppered down and the heads force chilled carbonated liquid down the sides of the container in a swirl pattern to minimize foaming
  • Once the fill height is reached, the vent completely closes at the same time the product is cut off

Quality & Sustainable Solutions

Nash is committed to providing sustainable solutions that help your company comply with environmental regulations while lowering the total cost of ownership. Our products and systems reduce resource consumption and emissions while operating reliably with minimal maintenance requirements. Together we build more sustainable and profitable plants.

ISO Certified

NASH systems are manufactured to ISO 9001 standards and committed to excellence and customer service extends from manufacturing and installation to technical assistance and beyond. Service and distribution centers are globally located and offer quality service and support for NASH products.

Global Provider

Nash is a leading global provider of highly engineered vacuum technologies renowned for delivering quality, reliability, value, and performance.

Backed by over 110 years of experience, NASH certified experts provide aftermarket support with maintenance, service, parts, and repair. Service centers are globally located to protect your vacuum system investment and provide quality, reliable, and efficient solutions.