Castair 80 Gallon Horizontal Air Receiver Tank — 200 PSI ASME Coded (Part# 80H200)
The Castair 80H200 is a 80-gallon horizontal air receiver tank rated for 200 PSI working pressure, built to ASME code. If you are putting together a serious shop compressor — a cast iron two-stage pump, a 7.5 or 10 HP motor, built to last — the tank is not the place to cut corners. ASME code compliance means this tank has been designed, tested, and stamped to meet the standards for pressurized vessels used in commercial and industrial applications. That matters for insurance, for inspections, and for the people working in your shop.
The horizontal orientation is a deliberate choice for many installations. Horizontal tanks slide under workbenches, fit along walls in narrow equipment rooms, and lower the center of gravity compared to vertical tanks of the same capacity. If you have ceiling height restrictions or you are building a compressor on a skid or trailer, horizontal is often the practical answer. At 80 gallons, this tank pairs well with compressor pumps in the 15-25 CFM output range — enough capacity to buffer the pump output and reduce short-cycling.
Tank Specifications
- Part Number: 80H200
- Capacity: 80 gallons
- Orientation: Horizontal
- Dimensions: 20 in diameter x 66 in length
- Top Plate: 17 x 44 in
- Maximum Working Pressure: 200 PSI
- Weight: 230 lbs
- Code Compliance: ASME coded
Why ASME Coding Matters
ASME (American Society of Mechanical Engineers) coding on a pressure vessel is not a marketing label — it is a certification that the tank was manufactured to a specific standard for design, materials, fabrication, and testing. An ASME-coded tank has been hydrostatically tested and stamped. In many jurisdictions, commercial and industrial air systems are required to use ASME-coded vessels. Even where it is not strictly required, the ASME stamp is what your insurance company wants to see and what a safety inspector will ask about.
Non-coded tanks are available and serve their purpose for portable and light-duty applications. But if you are building a stationary shop compressor intended for daily use, ASME code is the standard. The Castair 80H200 meets that standard.
Horizontal vs. Vertical — When to Choose Each
Castair offers this tank in both horizontal (80H200) and vertical (80V200) configurations. Both are 80 gallons, both are 200 PSI ASME coded, and both weigh 230 lbs. The choice comes down to your installation:
- Horizontal (80H200): 20 in dia x 66 in long — fits under benches, along walls, on skids or trailers, lower center of gravity, easier to secure on a mobile mount
- Vertical (80V200): 24 in dia x 48 in tall — smaller floor footprint, easier to fit in a corner, simpler plumbing when the pump mounts on top
For a shop where floor space is tighter than ceiling height, the vertical tank saves square footage. For a shop where the compressor is going against a wall or under a bench, or where height is restricted, the horizontal tank is often the better fit. For a trailer-mounted compressor, horizontal is almost always the right choice for stability.
Sizing This Tank for Your Compressor
A common rule of thumb is 4-6 gallons of tank capacity per CFM of compressor output. An 80-gallon tank pairs well with a compressor delivering roughly 13-20 CFM at working pressure. That covers most 5-7.5 HP cast iron two-stage applications. If you are running a 10 HP compressor at higher CFM output, stepping up to a 120-gallon tank (part# 120H200 horizontal or 120V200 vertical) gives you better buffer capacity and fewer pump cycles per hour, which extends pump life.
Undersizing the tank causes the pump to short-cycle — it runs, cuts out, runs again quickly because the tank pressure drops fast. That is hard on the motor, hard on the pump, and hard on your electrical system. Oversizing the tank is rarely a problem — more buffer capacity means longer intervals between pump cycles and cooler operation.
Installation Notes
- Weight: At 230 lbs empty, plan for proper rigging equipment and two or more people for positioning
- Drain: Install a tank drain valve at the lowest point — horizontal tanks accumulate condensate that must be drained regularly to prevent internal corrosion
- Safety valve: Install an ASME-rated pressure relief valve sized for your compressor output — do not run any tank without a properly rated PRV
- Support: Horizontal tanks require saddle-type supports or mounting cradles — the tank should not rest directly on the ground over its entire length
- Inspection: Internal inspection access varies by installation — budget time for periodic visual inspection per ASME and local requirements
Where This Tank Fits in the Castair Lineup
Castair's ASME-coded tank range covers 60 gallons through 240 gallons. Here is where the 80-gallon tanks sit:
- 60 Gal Vertical (60V150): 150 PSI, 138 lbs — entry-level ASME tank for smaller compressors
- 80 Gal Vertical (80V200): 200 PSI, 230 lbs — same capacity, smaller footprint, vertical orientation
- 80 Gal Horizontal (80H200): 200 PSI, 230 lbs — this tank, horizontal for bench or skid mounting
- 120 Gal Vertical (120V200): 200 PSI, 355 lbs — step up for 10 HP and higher applications
- 120 Gal Horizontal (120H200): 200 PSI, 355 lbs — horizontal for 10 HP skid or wall installations
- 240 Gal Horizontal (240H200): 200 PSI, 700 lbs — large industrial installations
When to Choose This Tank vs. Stepping Up or Down
Choose the 80H200 if: You are pairing with a 5-7.5 HP cast iron two-stage compressor, your installation is horizontal by necessity (bench mount, skid, trailer, or wall clearance), and you need ASME code compliance for commercial use.
Step down to the 60-gallon (60V150) if: You are running a smaller 3-5 HP compressor for light shop use and space is the primary constraint. Note that the 60V150 is rated only to 150 PSI, which limits your options with some higher-pressure applications.
Step up to 120-gallon if: You are running a 10 HP or larger compressor, you have high continuous air demand, or you want to minimize pump cycling for maximum pump longevity. The 120-gallon at 200 PSI is the next step in the Castair line.
Why Buy From Air Compressor Factory Direct?
- Castair specialists: We know these tanks, the correct pumps and motors to pair with them, and how to spec a complete compressor package
- Free shipping on qualifying orders — important on a 230-lb tank
- Free technical support: Call us with your application details and we will help you choose the right tank size and orientation
- Full manufacturer warranty: ASME-coded vessels sold with complete documentation and support
- Honest sizing advice: We will not sell you a bigger tank than you need, and we will tell you when you need to step up
Call 866-217-0063 for quick answers and help!
