Rotary Screw Compressors

A rotary screw compressor uses two intermeshed helical rotors (screws) within a precisely machined stator to compress air. Clearances between the rotors and the stator are very small and are usually sealed by injected lubricant. As the rotors turn, their helical grooves trap air and seal against the stator wall. The volume of these grooves decreases as the rotors turn and mesh together, compressing the air while moving it to discharge port.

Rotary screw compressors are built as packages which consist of the compressor unit (air end), lubrication system, cooling system, capacity control system, and discharge air cleanup system.

DetailsPart NameCFMHPDescription
LiteratureAqua-Air Series17-605-15Water sealed, very quiet, includes a refigerated air dryer
DetailsPart NameCFMHPDescription
LiteratureC-Series30-555-15Quiet Enclosed, Base or Tank Mounted
LiteratureM-Series15-385-10Open or enclosed, base or tank mounted, Single or three phase
LiteratureM-CDF Series15-385-10Open or enclosed, tank mounted with refrigerated dryer, single or three phase
LiteratureM-CDD Series55-385-10Open or enclosed, tank mounted with desiccant dryer, single or three phase
LiteratureD Series55-16515-40Direct drive, open or enclosed, base, platform or tank mounted
LiteratureD-CDD Series55-12515-30Direct Drive, open or enclosed, base, platform or tank mounted with desiccant dryer
LiteratureDG Series125-22530-50Direct drive, geared air end, open or enclosed
LiteratureUD Series110-28040-60Updraft cooler, direct drive, open or enclosed
LiteratureSP16 Series320-58875-125Updraft cooler, direct drive, open or enclosed, low noise level
LiteratureSP20 Series545-1140125-300Updraft cooler, direct drive, open or enclosed, low noise level
LiteratureVFD Series60-191015-500Variable Speed Drives (Main and fan motors), open or enclosed
LiteratureLineshaft Series55-26515-60Belt Driven off of your PTO, pneumatic controls
LiteratureECC Series210-160050-450Built for outdoor jobsite use

Direct Drive Rotary Screw Compressors

Standard Direct Drive

Simplicity of design and durability of components assures a long service life for our standard direct drive rotary screw air compressors.

  • Fewer but larger bearings
  • Slower operating speeds
  • Lower noise levels
  • 15 to 200 HP Units available

Geared Direct Drive

Cal Supply's Direct Drive Geared Rotary Screw Air Compressors are built with optimized rotor speed in mind. This allows for a greatly enhanced performance in a given motor size.

  • Increased output and efficiency
  • No belt losses
  • 30, 40 and 50 HP Units Available

Updraft Cooler Direct Drive

In our Direct Drive Updraft Cooler Rotary Screw Compressors vertical cooling air flow simplifies exhaust ducting or heat reclamation and reduces the clearance required around the machine.
  • Prevents recirculation of hot exhaust air
  • Reduces package footprint
  • 40, 50 and 60 HP Units Available

Small Belt Drive Rotary Screw Compressors

Cal Supply's Small Belt Drive Rotary Screw Air Compressors deliver more CFM per horsepower (HP) than reciprocating air compressors at pressures below 125 PSI.

  • Compact design
  • Quiet enclosures available
  • Capable of 100% duty cycle
  • Easy to maintain
  • 5, 7.5, 10 and 15 HP Models Available

Variable Speed Rotary Screw Compressors

Variable speed technology allows compressor output match system demand by changing compressor speed.
  • Most efficient at loads of 70% or less
  • Considerable Energy Savings
  • Eligible for rebates from many utility companies
  • Easy to maintain
  • 15 through 300 HP Units Available

Variable Displacement Rotary Screw Compressors

Oil Free Rotary Scroll Compressors

These machines are the perfect fit for small to medium sized medical, dental, labratory, pharmaceutical and electronics applications
  • Noise levels as low as 49 dB(A)
  • Minimal Vibration
  • Air Cooled
  • Pressures as high as 140 PSIG
  • Easy installation and maintenance
  • 3 through 40 HP Packages Available

Two Stage Oil Free

Two stage oil free compressors maximize efficiency in larger sizes.
  • Cooling water is required
  • Offers the cleanest possible compressed air
  • 125 through 400 HP Units Available

Packaged Rotary Screw Compressed Air Systems

Two stage oil free compressors maximize efficiency in larger sizes.

  • Packaged rotart screw compressor systems offer pre-piped and wired components to minimize installation costs as well as make relocation easy.
  • 5 through 30 HP Units Available