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files/0318414_castair-compressor-gen.-weld.-industrial-series-30-gal.-horiz.-gx390-19.7-cfm-175-psi-5000w_360.jpg
CASTAIR Compressor/Gen./Weld. | Industrial Series | 30-Gal. Horiz. | GX390 | 19.7 CFM @175 PSI | 5000W GPE211024
By Castair
- Regular price
- $12,021.00
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- Regular price
- $12,021.00
Estimated Shipping Time
Estimated Shipping Time
At Summit Forge Supply, we offer free standard shipping on all U.S. orders, with most orders processing within 1–2 business days and delivering in approximately 3–5 business days. We ship via trusted carriers including USPS, UPS, FedEx, and LTL freight providers, and all orders include tracking and shipment insurance. If your order is delayed, damaged, lost, or missing items, please contact us within 7 days so we can promptly assist with a replacement or refund. Returns are accepted within 30 days on unused items in original packaging, with return shipping covered by Summit Forge Supply. See full policy here: Shipping Policy
What Is Your Return Policy?
What Is Your Return Policy?
Summit Forge Supply accepts returns on eligible U.S. orders within 14 days of delivery, provided items are unused, undamaged, and in their original packaging with proof of purchase. Returns must be initiated within 7 days of receipt, and approved returns include prepaid return shipping; refunds are issued to the original payment method within up to 14 days after inspection, with a 25% restocking fee for change-of-mind returns. Defective, damaged, incorrect, or lost items qualify for a full refund or replacement at no cost to the customer when reported promptly. Custom or personalized items, perishable goods, gift cards, and downloadable products are non-returnable. See full policy here: Return Policy
How The CASTAIR Combo Compares To Other 3-In-1 Combo Options
Contractors and service trucks evaluating compressor, generator, and welder combo units usually face this question: should I get a basic oil-less combo unit, a standard mid-range combo, or invest in an industrial-grade unit built with a cast iron pump and ASME-compliant components?
Here's the honest comparison:
| Feature | Basic Oil-Less Combo Unit ($4,500-$6,500) | Standard Combo Unit ($6,500-$10,000) | CASTAIR Industrial Series ($12,021) |
|---|---|---|---|
| Pump Type | Oil-less, shorter service life | Oil-lubricated, moderate RPM | Two-stage cast iron pump, oil-lubed, runs at a low 808 RPM |
| Noise Level | Louder | Moderate | Quieter operation due to low RPM design |
| Air Output | 14-18 CFM at 90-100 PSI | 15-19 CFM at 100 PSI | 24.7 CFM at 0 PSI, 19.7 CFM at 100 PSI |
| Crankshaft Bearings | Standard bushings | Standard bearings | Tapered roller bearings at both ends for superior support and less friction |
| Connecting Rods | Standard | Standard | Precision steel rods with automotive-type rod insert bearings |
| Pistons | Standard ring count | Standard | Four rings per piston for higher efficiency and less oil carry-over |
| Tank Compliance | Basic or non-compliant | Some ASME compliance | ASME-compliant powder coated tank with ASME safety valves |
| Generator Output | 3000-4000W | 5000W | 5000W running, 5500W surge, two 115V and one 230V outlet |
| Welder Duty Cycle | Lower duty cycle at higher amps | Moderate duty cycle | 100% duty cycle at 130A, 60% at 180A, 35% at 240A |
Why The CASTAIR Combo Is Worth The Investment
This isn't just a 3-in-1 combo unit, it's an industrial-grade machine built with a cast iron pump and precision internal components designed for a longer service life than typical oil-less or lightly built combo units.
The CASTAIR specifically addresses the needs of contractors and service trucks that rely on dependable air, power, and welding capability on remote job sites where downtime isn't an option.
Quieter Operation, Longer Service Life. The two-stage cast iron pump runs at a low 808 RPM, which makes the machine noticeably quieter on the job site while also extending pump life well beyond what oil-less compressors typically deliver.
Engineered With Precision Internal Components
Tapered roller bearings at both ends of the crankshaft provide superior support and reduce friction over the life of the pump
Precision steel connecting rods with automotive-type rod insert bearings at the crankshaft add long-term reliability
Four-ring pistons improve efficiency and reduce oil carry-over compared to standard piston designs
Built For Job Site Versatility
The 5000 watt running, 5500 watt surge generator powers tools and equipment through two 115V outlets and one 230V outlet
The 40A to 240A DC arc welder features universal 50mm quick connectors and a 100% duty cycle at 130A
The ASME-compliant 30 gallon tank with ASME safety valves provides both compliance and confidence for demanding job site use
Real Savings
The oil-lubricated cast iron pump reduces the frequent replacement costs associated with oil-less compressor pumps
Tapered roller bearings and reinforced connecting rods reduce the risk of costly pump failure under heavy use
A single 3-in-1 unit eliminates the cost of purchasing and maintaining three separate machines
Free shipping and no sales tax through Summit Forge Supply keeps the total cost down compared to buying elsewhere and paying tax and freight separately
The Bottom Line Contractors and service trucks that need dependable air, power, and welding on remote job sites can't afford a combo unit that wears out quickly or can't keep up with demanding use. The CASTAIR Industrial Series is built with a cast iron pump, precision internal components, and ASME-compliant construction, so it delivers reliable performance job after job. For anyone running a service truck or remote job site operation, this is the combo unit built to handle it all.
- 808 RPM, oil-lubed cast iron pump for quiet operation and long service life
- 24.7 CFM at 0 PSI, 19.7 CFM at 100 PSI
- Tapered roller bearings at both ends of crankshaft for superior support & less friction
- Precision steel connecting rods with automotive type rod insert bearings at crankshaft, and bearings at wrist pin for long service life and reliability
- Disc and spring valves for ease of service, efficiency, and maximum reliability
- Pistons have four rings for higher efficiency, and less oil carry-over
- Automotive filters with paper element provide clean intake air and quiet operation
- Easy to read sight glass to ensure proper oil level at a glance
- 5000 watt running, 5500 surge watt generator with two 115V 17A outlets, and 1 230V 23A outlet
- 40A to 240A DC arc welder with universal 50mm quick connectors
- Welder duty cycle: 130A = 100%, 180A = 60%, 240A = 35%.
- 30 gallon ASME-compliant powder coated tank with ASME safety valves
- Rigid metal guard keeps belt totally enclosed during operation
- Industrial grade Honda GX390 engine 12-volt alternator, recoil and electric start, and 1.6 gallon fuel tank
- Battery and cables sold separately