NewsHow Does A Vacuum Pump Actually Work? 

13 April 2020by support

We don’t really think about vacuum pumps and how important they are until we need them. For the average person, you only think about a vacuum pump when you are having trouble with your plumbing, especially the toilet, right?

Outside the usual residential plumbing problems, vacuum pumps are used in many things, mostly in construction.

They work by pumping or moving gas or liquid and in some cases solid, molecules out of one area by using pressure. They work on three principles – entrapment, momentum, and positive displacement.

Following are the

1). Entrapment Pumps

Entrapment pumps use chemicals and apply them to the container or area that needs to be vacuumed. They also use cold temperatures to condense gases into a solid or absorbable state.

Once the molecules react to the chemicals, they are then removed by the entrapment pumps. Entrapment pumps are usually used alongside momentum transfer pumps and positive displacement pumps.

2). Momentum Transfer Pumps

Momentum pumps use high pressure to pump out the materials you want to vacuum. They use high-speed jets of fluids or gas depending on the need. There are two types of momentum transfer pumps:

  • Diffusion pump – blows out jets of oil
  • Turbomolecular pump – uses high-speed fans

3). Positive Displacement Pumps

Positive displacement pumps create low vacuums by expanding the volume of a container. They expand a cavity to allow clogged materials to flow out.

The expansion reduces the pressure allowing the molecules to flow out of the container.

4). Regenerative Pumps

Regenerative pumps are rotodynamic machines that utilise vortex behaviour of fluid or air. It uses the principle of energy transfer from a moving rotor to gas in the channel of the pump.

They are usually used to increase pressure in water networks in car wash installations. They are popular in the chemical industry and mechanical engineering. 

5). Venturi Vacuum Pump

A venturi vacuum pump or aspirator works by using compressed air running through the pump. It has no moving parts. It reduces pressure from a “choke” or constricted area so fluid can flow through.

Venturi nozzles and tubes are used alongside the pump to elongate the exhaust section of the pipe.

The vacuum effect becomes stronger when the exhaust section of the pipe is extended longer. The longer the pipe the stronger the vacuum.

6). Steam Ejector

A steam ejector has no moving parts. It is a simple pumping device. This is a simple, reliable, and affordable vacuum device.

It uses fluid or gas as a source of force which is called steam jet ejector. Steam ejectors are most popular in the chemical industry. 

Two major functions of Steam Ejectors:

  1. Single-stage steam ejectors
  2. Multi-Stage steam ejector

These types of vacuums are further classified into the following:

  • Liquid Ring Vacuum Pump
  • Single Cone Vacuum Pump
  • Close Couple Vacuum Pump
  • Two-Stage Vacuum Pump
  • Chemical Process Pump 
  • Twin Lobe Roots Blower 
  • Rotary Vane Pump
  • Diaphragm pump
  • Piston Pump
  • Scroll Pump
  • Screw Pump
  • Wankel Pump
  • External Vane Pump
  • Roots Blower or Booster Pump
  • Multi-Stage Roots Pump
  • Toepler Pump
  • Lobe Pump

The measure of the performance of vacuum pumps is its pumping speed. Achieving a high vacuum can be challenging because of factors like outgassing and vapour pressure changing constantly.

Materials like grease, oil, rubber, or plastic gaskets, also affect the efficiency and strength of the vacuum.

The good news is, you do not have to worry about the technical processes. There is no need to worry about what type of pump you need. 

Pressure Works is here to help! Just tell us what you need and we will take care of the problem for you. Pressure Works, Water Jet, and Vacuum Services will match your needs to our services.

Our Services Include:

  • Hydro Excavation
  • Non-Destructive Digging
  • Vacuum Loading
  • Liquid Waste Removal
  • Drain Cleaning 
  • Suction Truck

Our vacuum loading services are used to contain spills, following, and more. Our vacuum trucks are used for the removal and recovery of the following:

  • Brick dust
  • Borehole cleaning, pier hole, and pile hole cleaning
  • Drill slurry, non-destructive digging mud, and hydro mud
  • GPT and carwash pit cleaning
  • Marble slurry and concrete slurry
  • Pits, stormwater, and waste

All our vacuum loaders are licensed by the Environmental Protection Agency (EPA) and we service both residential and commercial clients, across a wide range of industries:

  • Civil and Construction Contractors
  • Commercial and Industrial Buildings
  • Communications Contractors
  • Electrical Contractors
  • Gas, Power, and Electrical Companies
  •  Government Departments
  • Municipal Councils
  • Plumbing Contractors
  • Road Builders
  • Schools, Tafe, and Universities


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