Question 1

What is a dry claw vacuum pump?

Accepted Answer

A dry claw vacuum pump is a positive displacement pump. Two claw-shaped rotors are mounted inside a cylindrical housing. The rotors move in opposite directions and do not come into contact with each other or the housing. The minimalclearance between the claw rotors and the housing optimizes the internal seal. Thus, no lubricants or operating fluids are required in the compression chamber. Through the rotation of the claw rotors, the pumped medium is drawn in, compressed and expelled via the outlet, generating vacuum.

The oil-free operation makes dry claw vacuum pumps ideal for applications requiring dry vacuum environments. They are used for various applications in industries ranging from milking robots to packaging and pneumatic conveying.

Question 2

Are dry claw vacuum pumps positive displacement pumps?

Accepted Answer

Yes, they are. A positive displacement pump is used to move and compress gas or air by repeatedly trapping a fixed volume of the pumped medium and moving it mechanically through a system. It maintains a constant flow and speed regardless of changes in pressure.

Question 3

How does a dry claw vacuum pump work?

Accepted Answer

Dry claw vacuum pumps and compressors combine performance, reliability, and efficiency through innovative design.

They feature two claw-shaped rotors that are mounted in a cylinder and move in opposite directions. The motion of the rotors extracts, compresses and expels the pumped medium.

The claw rotors do not come into contact with each other or the housing. Thus, no lubricants or operating fluids are required in the compression chamber. The minimal clearance between the rotors and the chamber housing optimizes the internal seal.

Dry claw vacuum pumps and compressors are driven by a directly flange-mounted motor. A synchronizing gearbox maintains precise rotor timing.

Claw compressors operate according to the same principle.

Vacuum generation in claw vacuum pumps explained in three steps

1. Inlet

The pumped medium enters via the inlet port.
Two claw-shaped rotors move continuously in opposite directions inside the cylindrical housing.
The claw rotors do not come into contact with each other or the housing.

2. Compression

As the chamber volume increases, the pumped medium is drawn in.
The motion and shape of the claw rotors compress the pumped medium and transport it to the outlet.
No lubricants or other operating fluids are required in the compression chamber, as minimal clearance between the rotors and the chamber housing optimizes the internal seal.

3. Outlet

The compressed medium is expelled through the outlet.
A synchronizing gearbox maintains precise rotor timing throughout the process.

Question 4

What is the difference between a dry claw vacuum pump and compressor?

Accepted Answer

Compressors produce overpressure, while vacuum pumps produce vacuum.

Basically, a dry claw compressor is built the same way as a dry claw vacuum pump, only the inlet and outlet are connected the other way around.

Question 5

What are the advantages and disadvantages of dry claw vacuum pumps and compressors?

Accepted Answer

Dry claw vacuum pumps and compressors from Busch are highly energy-efficient and nearly maintenance-free. They have several benefits:

No lubricants or operating fluids are required
Air-cooled
Nearly maintenance-free
Low noise levels

Vacuum pumps and compressors with this technology are not suitable for applications in industries such as metallurgy or flat panel display production. These processes require a high vacuum level, while MINK operate within the rough vacuum range.

Question 6

How do I select the appropriate dry claw vacuum pump?

Accepted Answer

Several factors have to be considered when selecting the right vacuum solution. These factors vary depending on the application and the specific needs of your process.

Use our product finder to find your ideal vacuum pump. Or contact us to find out which vacuum solution fits your needs best. Our Busch experts are happy to help!

Question 7

What makes Busch one of the leading manufacturers of dry claw vacuum pumps and compressors?

Accepted Answer

Busch has been manufacturing dry claw pumps and compressors for the last 30 years and offers the widest range of dry claw vacuum pumps and compressors.

Product series	Nominal pumping speed	Function
MINK MA/MB	18 m³/h	vacuum pump / compressor
MINK MI	50 m³/h – 580 m³/h	vacuum pump / compressor
MINK MV	40 m³/h – 1,200 m³/h	vacuum pump
MINK MM	62 m³/h – 600 m³/h	vacuum pump
MINK MM	62 m³/h – 330 m³/h	compressor
MINK MH	18 m³/h	compressor

Claw Vacuum Pumps and Compressors

Types of dry claw vacuum pumps

Efficient and reliable vacuum and compressed air generation

Applications

Get your turnkey vacuum system with our MINK vacuum pumps now!

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