What does 2 stage vacuum pump mean?

What does 2 stage vacuum pump mean?

Different Types of Vacuum Pumps

There are many different types of vacuum pumps, but what works best for vacuum forming and specifically our table top vacuum press? Each work differently and produce different levels of vacuum. Here is a quick run down of the common types and why we do or don’t recommend it.

Diaphragm Pumps are very quiet and durable and don’t use oil or have any oil mist. This type of pump can only produce medium vacuum levels (about 83.5%) and low CFM. These are not recommended for our thermoforming vacuum press.

Vacuum Generators require an air compressor and venturi pump to create a vacuum. They are very noisy and can create inconsistently high levels of vacuum. This type of pump transfers all the wear and tear to your air compressor and other expensive equipment. We do not recommend this for our presses.

Oil Filled Rotary Vane Pumps (RECOMMENDED) create the best vacuum for the cost. They are designed to run continuously for extended periods of time. There are lots of options for every budget. They are durable, inexpensive, easy to work with, require no additional equipment, and are easily adaptable to vacuum pressing.

What does 2 stage vacuum pump mean?

We believe Oil Filled Rotary Vane Pumps are the best choice and have designed our vacuum formers specifically to work with them. Each press includes fittings to convert this kind of pump to our easy connect system which is plug and play, or you can purchase one of our pre-converted vacuum pumps here
Single stage vs two stage

Two stage pumps cost up to twice as much as single stage…Say what? What is the difference other than price? A two stage design has two rotors and vanes. This means that the first stage generates vacuum and the second stage cleans the system, leading to a deeper ultimate vacuum level. As a result, two stage pumps can produce a deeper vacuum than single stage pumps.

Both single and two stage pumps can reach 29.92 inches of mercury at sea level (inHg possible based on altitude, see conversion chart here). When making your choice you should consider what you want to achieve. If your goal is faster evacuation, cleaner process, and quieter operation, then the answer is a two stage pump.