Cal Supply Co. can help you select the best vacuum pump for your intended application.  We can provide bare pumps as well as complete vacuum systems.

“Vacuum” can be described as a negative pressure (one that is lower than atmospheric pressure). It is commonly measured in inches of Mercury (in. Hg) instead of pounds per square inch (PSI), which is used to measure positive pressure. Where we define positive pressure as some number of PSI above atmospheric pressure, we define vacuum as some number of inches of Mercury below atmospheric pressure. Where the vacuum is only slightly below atmospheric pressure, units of inches of Water are sometimes used to express the vacuum level.

Rotary Vane Vacuum Pump

For high vacuum applications a different point of reference is used. Torr, or millimeters of Mercury, is referenced to a perfect vacuum (no air whatsoever). A perfect vacuum is 0 Torr, and atmospheric pressure is 760 Torr.

Various levels of vacuum are used for various tasks. These include holding objects onto a surface, forcing materials into molds, removing unwanted gases from materials, moving bulk materials through pipes (for both medical and industrial applications), drying materials, and removing air from packaging and processes where the presence of oxygen is detrimental.

Selecting a vacuum pump is a little more involved than selecting an air compressor. With air compressors we know what we’re working with: atmospheric air. With vacuum pumps we’re often working with air that has something else mixed in with it, and we have to be concerned about any effects this other material will have on the vacuum pump and the surrounding area to which the air is exhausted.

Rotary Vane Vacuum Pumps

Recirculated Oil Type Rotary Vane Vacuum Pump

This type of lubricated rotary vane vacuum pump is intended for general industrial use where oil can be tolerated. Cal Supply's recirculated oil type pumps are regarded as highly reliable while requiring minimal maintenance.

• Flow Range: 7 - 903 CFM
• HP Range: 0.6 - 50
• Torr: 0.5
• In. Hg: 29.9

Dry Running Non-Lubricated Rotary Vane Vacuum Pump

Cal's non-lubricated rotary vane vacuum pump is intended for general industrial use where oil cannot be tolerated. While also highly reliable dry running non-lubricated rotary vane vacuum pumps require a higher level of maintenance than the lubricated types.

• Flow Range: 3 - 242 CFM
• HP Range: 1.2 - 15
• Torr: 112
• In. Hg: 25.5

Once-Through Oil Lubricated Rotary Vane Vacuum Pump

In rounding out our rotary vane vacuum pump line Cal Supply offers the Once-Through Oil Lubricated Vacuum Pump designed for process and chemical applications where gases or vapors can't be allowed to accumulate with in the vacuum pump.

• Flow Range: 7 - 706 CFM
• HP Range: 0.75 - 50
• Torr: 0.5
• In. Hg: 29.9

Rotary Screw Vacuum Pumps

Cal's dry running non-lubricated rotary screw vacuum pumps are designed for pharmaceutical and process applications where high vacuum levels are required and no oil can be tolerated.

• Flow Range: 68 - 1600 CFM
• HP Range: 5 - 75
• Torr: 0.01

Radial Blowers

Our line of radial "fan-type" blowers are designed for high flow, low vacuum applications such as scrap and dust collection.

• Flow Range: 75 - 2,013 CFM
• HP Range: 3 - 17.5
• Torr: 685
• In. Hg: 2.9
• In. WG: 40

Rotary Lobe Vacuum Pumps

Cal's non-lubricated rotary lobe vacuum pumps are used as stand alone units or with boosters in series with other vacuum pumps for low vacuum applications.

• Flow Range: 347 - 1,646 CFM
• HP Range: 3 - 10
• Torr: 379
• In. Hg: 15
• In. WG: 204

Liquid Ring Vacuum Pumps

Our line of liquid ring vacuum pumps are used in applications where high levels of liquids and solids are present as often seen in medical vacuum applications. Cal's liquid ring vacuum pumps are primarily water sealed although other liquids are also used.

• Flow Range: 15 - 340 CFM
• HP Range: 5 - 25
• Torr: 25
• In. Hg: 28.9