Product Information

This "Medium Duty" Onboard Air System by Viair takes all of the guess-work out of getting all of the parts you'll need to install one of the most sophisticated, all-inclusive onboard air systems available today. The Medium Duty Onboard Air System comes complete with a dependable, low amp draw 325C, 33% Duty Cycle compressor at its heart that will fill the supplied 2.5 gallon tank from 110-150 PSI in approximately one minute. Included is everything you'll need to add a reliable single air source to your vehicle. (For vehicles with up to 33-inch tires).

Features & Benefits

  • 12-VOLT
  • Complete air source solution
  • Will inflate up to a 33" tire
  • Includes a medium duty compressor & 2.5 gallon air tank
  • Includes dash panel gauge with on/off switch
  • Permanent Magnetic Motor
  • Sealed design - Moisture & Dust Resistant
  • Oil-less Design
  • High Performance PTFE Piston Ring
  • Stainless Steel Valves
  • Anodized Aluminum Alloy Cylinder
  • Automatic Reset Thermal Overload Protector
  • 1 year manufacture warranty

Tech Specs

Voltage: 12-Volt
Duty Cycle: 33% @ 100 PSI
Max Working Pressure: 150 PSI
Max Amp Draw: 19 Amps
Min. Ambient Temp: -40 degrees F
Max. Ambient Temp:: 158 degrees F
Compressor Dimensions: 8" L x 4" W x 7.05" H
Compressor Net Weight: 6.95 lbs.
 

Parts Included

Duty Cycle Reference Chart

Duty Cycle: 100 PSI @ 72F
Max. Run Time / Min. Rest Time
10% Duty Cycle 3 Min. On / 27 Min. Off
15% Duty Cycle 6 Min. On / 34 Min. Off
20% Duty Cycle 8 Min. On / 32 Min. Off
25% Duty Cycle 10 Min. On / 30 Min. Off
30% Duty Cycle 13 Min. On / 30 Min. Off
33% Duty Cycle 15 Min. On / 30 Min. Off
100% Duty Cycle Continous Duty @ 100 PSI @ 72F

This compressor has a duty cycle of 33%

Note: Duty cycle refers to the amount of time a compressor can be operated in given time period at 100 PSI, at a standard ambient temperature of 72 degrees F. Duty cycle is commonly expressed in percentage format. The higher the percentage the longer run time. For more "frequently asked questions" on compressors see Viair FAQ Page.  

Fill Rates

2.5 Gallon Tank
Fill Rate
0 to 145 PSI 3 min 30 sec
110 to 145 PSI 1 min 1 sec
31" x 10.5" Tire
Fill Rate
0 to 30 PSI 4 min 58 sec
15 to 30 PSI 2 min 45 seconds
33" x 12.5" Tire
Fill Rate
0 to 30 PSI 7 min 15 sec
15 to 30 PSI 3 min 55 seconds

Performance Data

PSI
CFM
A
0 1.77 9
10 1.48 11
20 1.34 13
30 1.27 14
40 1.22 15
50 1.17 16
60 1.11 17
70 1.06 17
80 1.02 17
90 0.99 18
100 0.95 18
110 0.92 19
120 0.88 19
130 0.85 19
140 0.79 19
150 0.76 19

PSI = Pounds per squre inch - A measure of air pressure generated by an air compressor. CFM = Cubic feet per minute - Volume of air produced by the air compressor at a given pressure or PSI. A = Amps - A measure of the amount of electrical current used.

Items Included:
(1) 2.5 Gallon Viair Air Tank (1) 325C model Viair Air Compressor (1) 1/4" NPT Quick Connect Coupler (M) (1) Dash Panel Gauge with ON/OFF Switch (1) Pressure Switch with Relay (110 PSI on, 150 PSI off) (1) Reducer (1/8" NPT F to 1/4" NPT M) (1) 1/4" NPT 175 PSI Safety Valve (1) 1/4" Drain Cock (1) 1/4" NPT Compression Fittings (1) 4-inch Strip of Continuous Grommet Material (1) 20ft. 12 Gauge Wire with Inline Fuse Holder
Weight:
25 lbs.
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