Vacuum technology: what types of pumps exist and what to consider when choosing

Without ultra-high vacuum, no modern chip can be made. Rarefied air is also needed in food packaging, medical devices, and laboratory equipment. Choosing the right pump for a specific process often determines how reliably the entire production line runs.

The working pressure range here is enormous. A single pump covers only part of it, so equipment is selected for the task. Below you will see how the main technologies differ, where they are used, and what matters for maintenance.

⚙️ What vacuum technology is

💡 In short:

• Vacuum technology is a set of methods for creating and maintaining pressure below atmospheric.
• Equipment is divided into oil-sealed and dry pumps, as well as blowers and fans.
• The working range is selected for the process: from rough vacuum to ultra-high vacuum.
• Pressure ranges: 10/2026, according to VDI Wissensforum.

Vacuum technology is a set of solutions that create, measure, and maintain an environment with pressure below atmospheric. This includes pumps, vacuum chambers, seals, sensors, and control systems. Each process requires its own level of vacuum, so there is no universal equipment.

There is one reference point: vacuum begins where the pressure in a vessel is at least 70% below atmospheric, and high vacuum covers the range from 10⁻³ to 10⁻⁷ mbar (as of 10/2026, VDI Wissensforum). Below that begins ultra-high vacuum, and with it the requirements for chamber cleanliness and seal quality increase.

Different industries use different parts of this spectrum. Food packaging only needs rough vacuum. Thin-film deposition in microelectronics requires ultimate vacuum, and the chamber must remain perfectly clean.

Pressure in production is usually specified in millibars. This unit is convenient because it immediately shows how much the environment differs from normal atmospheric pressure.

Maintaining deep vacuum is harder than it looks from the outside. Air is pumped out by a pump, but microflows of gas remain in the chamber, gradually released from the walls and seals. That is why engineers select materials and connections to keep leaks to a minimum.

🔬 Types of vacuum pumps

The easiest way to understand the difference between the main types is through a table: it shows the working range, key feature, and typical application.

The difference between them is not which one is better, but which part of the range they are designed for. Turbomolecular and cryogenic pumps operate in high and ultra-high vacuum, scroll pumps cover the medium range, and rotary vane pumps are usually installed at the system inlet.

Each type solves its own task in its own part of the scale. A turbomolecular pump does not pull air directly from the atmosphere, so it works in tandem with a backing pump. A cryogenic pump removes gas by freezing it on a cold surface and requires regeneration from time to time. The rotary vane pump remains the most common option for rough pumping.

If you need high vacuum, look for a turbomolecular pump paired with a backing pump.

Many manufacturers add to this list. For example, VAKUUM BOHEMIA on its vacuum technology page divides equipment into oil-sealed and dry pumps and separately shows blowers and industrial fans. The same page notes that standard pumps are designed for non-aggressive and non-explosive gases, while explosive atmospheres require ATEX-certified models (according to the company website, 10/2026).

🛠 Pump service and repair

Any vacuum system loses performance over time. The causes are usually simple: contaminated oil, worn seals, clogged filters, housing overheating. Planned maintenance costs less than an unexpected shutdown of your line.

What is checked first:

• oil level and condition in oil-sealed pumps;
• vacuum connections and seals;
• filters and inlet screens;
• housing temperature and bearing noise.

Before repair, check whether the warranty is still valid and whether spare parts are available for your model. If a pump fails, repair is often cheaper than buying a new one. VAKUUM BOHEMIA accepts vacuum pumps for repair from various manufacturers and separately services blowers and industrial fans (according to the company website, 10/2026).

🏭 Where vacuum technology is used

There are more industries that need vacuum than it seems. Below are the key sectors and their typical tasks.

The examples show that vacuum technology is needed both in high-tech manufacturing and in ordinary food packaging. The stricter the cleanliness requirements, the higher the demands on the pump itself. If you are launching a new line, determine the required pressure in advance, otherwise pump selection will turn into trial and error across models.

In medicine, vacuum is responsible for sterilization and the operation of analyzers, where an environment free of impurities is required. In the food industry, it extends shelf life and preserves product taste. In energy, vacuum processes are needed for solar panel production and battery technologies.

📈 What is changing in the industry

Manufacturers are developing equipment in several directions:

• dry systems reduce maintenance costs and environmental impact;
• pumps are equipped with sensors and connected to monitoring systems, so wear is visible in advance;
• compact models open up mobile applications;
• hybrid configurations combine different pump types for efficiency.

These trends are also changing service. If your pump is connected to a monitoring system, repairs are easier to plan in advance rather than waiting for a failure. Demand for dry solutions is growing along with requirements for process cleanliness.

Documentation requirements are also increasing. Customers increasingly request service logs and track consumable life, because line downtime is expensive. In response, manufacturers are developing service programs and personnel training.

⁉️🤔 Frequently asked questions

What is vacuum technology?

It is a set of technical solutions that create, measure, and maintain pressure below atmospheric. These include pumps, chambers, seals, sensors, and control systems. Such solutions are needed where cleanliness, absence of air, or precise environmental control matters.

Where are vacuum pumps used most often?

In microelectronics, medicine, the food industry, and scientific laboratories. In microelectronics, thin-film deposition is impossible without vacuum, and in the food industry it extends product shelf life. The specific pump type depends on the working pressure.

What is the difference between high vacuum and ultra-high vacuum?

The difference is in residual pressure: high vacuum covers the range from 10⁻³ to 10⁻⁷ mbar, and ultra-high vacuum begins below that limit. This regime is needed in scientific installations where a minimal concentration of gas molecules is essential. The deeper the vacuum, the more serious the requirements for seals.

Are dry pumps necessary?

It all depends on the process: dry models do not contaminate the chamber and require less maintenance, so they are chosen for microelectronics and laboratories. Oil-sealed pumps are easier to repair but require regular oil changes. The decision is made for the specific task.

Can a pump be repaired instead of buying a new one?

Often yes: worn seals, contaminated oil, and bearings are replaced, after which the pump holds working pressure again. Repair makes sense when the housing and rotor are free of serious damage. The conclusion is made after diagnosing the specific model and checking parts availability.

In short: how to choose a vacuum pump

You start not with a brand, but with the process. First determine the working pressure, then the required cleanliness and pumping speed.

• Microelectronics and science: choose a turbomolecular or cryogenic pump.
• Laboratory: scroll dry models will work.
• Food packaging: a rotary vane pump is sufficient.
• High process cleanliness: look at dry solutions.

Before purchasing, check spare parts delivery times and service conditions for your model, because repairability is often more important than price.