Viair 400P-Automatic Portable Air Compressor - Heavyweight Series (Duty Cycle 33% @ 100 psi)

Product Information

Viair 400P-Automatic compressor is Viair's first Automatic shut-off function portable compressor. This 33% duty cycle unit is capable of pressures up to 150 PSI and can be operated for up to 40 minutes at a time before needing to be rested. The 400P-Automatic comes with a close-ended gas station-style air gun for added convenience.

Features & Benefits

  • Oil-less Design
  • High Performance PTFE Piston Ring
  • Automatic shut-off function
  • Stainless Steel Valves
  • Moisture & Dust Resistant
  • Gearless Direct Drive Motor
  • Anodized Aluminum Alloy Cylinder
  • Automatic Reset Thermal Overload Protector
  • Dual-Stage Metal Air Filter
  • Aluminum Sand Tray with Vibration Isolators

Product Video

Tech Specs

Voltage: 12-Volt
Duty Cycle: 33% @ 100 PSI
Max Working Pressure: 150 PSI
Max Amp Draw: 26 Amps
Min. Ambient Temp: -40 degrees F
Max. Ambient Temp:: 158 degrees F
Compressor Dimensions: 11.25" L x 4" W x 7" H
Compressor Net Weight: 8.5 lbs.

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

31" x 10.5" Tire
Fill Rate
0 to 30 PSI 2 min 28 sec
15 to 30 PSI 1 min 25 sec
33" X 12.5" Tire
Fill Rate
0 to 30 PSI 4 min 00 sec
15 to 30 PSI 2 min 00 sec
35" X 12.5" Tire
Fill Rate
0 to 30 PSI 4 min 50 sec
15 to 30 PSI 2 min 20 sec

Performance Data

PSI
CFM
A
0 2.54 16
10 2.26 18
20 2.12 21
30 1.94 22
40 1.84 23
50 1.70 24
60 1.62 25
70 1.55 25
80 1.48 26
90 1.41 26
100 1.27 26
110 1.20 26
120 1.09 26
130 0.95 25
140 0.85 25
150 0.71 25

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) 400P model Viair Air Compressor w/sand tray (1) Deluxe Dual Compartment Carry Bag (1) 25' quick connect extension hose with heat shield (1) 3-pc. Inflation Tips Kit (1) Gas Station-Style tire gun with 200 psi gauge (1) Dual Battery Clamps with 40-amp Inline Fuse Holder
Weight:
13 lbs.
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