How Much Oxygen in a Scuba Tank? A 2026 B2B Buyer’s Guide to Gas Capacity, Safety & Supply
If you’re asking “how much oxygen in a scuba tank,” the answer depends on cylinder volume, pressure rating, and gas purity. For a standard recreational scuba tank (AL80, 80 cubic feet at 3000 psi), the oxygen content is 100% medical or diving-grade oxygen, typically stored at 3000 psi (207 bar). However, as a sourcing agent or brand owner, you need more than just a number – you need reliable specifications, compliance with US and international standards, and a supply chain partner who can deliver at scale. In this guide, we break down every dimension of scuba oxygen tank capacity, from tank sizes to fill pressures, and show how Zhuzhou XingYe Chemical can support your business with custom OEM/ODM solutions.
Understanding Scuba Oxygen Tank Capacity: The Core Search Intent
The phrase “how much oxygen in scuba tank” is searched by divers, equipment importers, and gas suppliers who need a concrete answer. Here’s a quick response:
- Standard aluminum 80 cu ft tank holds 80 cubic feet of gas at 3000 psi – this is 100% oxygen if filled for oxygen service, or compressed air for recreational diving.
- In terms of oxygen weight: 80 cu ft of pure oxygen weighs approximately 3.2 kg (7.05 lbs) at standard temperature and pressure.
- Larger cylinders (e.g., 100 cu ft or 120 cu ft) hold proportionally more oxygen – up to 4.8 kg for a 120 cu ft tank.
- For oxygen therapy or professional diving, tanks are often filled to 3000–4500 psi with 99.5%+ purity.
But as a B2B buyer, you need more than trivia. You need to know: certifications (DOT, CE, ISO), MOQ, lead times, and customization options. That’s exactly what we cover next.
Industry Pain Points: Why “Just the Number” Isn’t Enough
Import managers and brand owners face several challenges when sourcing scuba oxygen tanks:
- Inconsistent purity levels – many suppliers claim “high purity” but fail to meet medical or diving standards (USP, EP, or ≥99.5% O2).
- Lack of regulatory compliance – cylinders without DOT (USA), TC (Canada), or PED (Europe) approvals cannot be legally used in many markets.
- Unclear MOQ and lead times – small brands need flexible MOQs; large wholesalers need bulk shipment guarantees.
- Hidden costs – FOB/CIF pricing, cylinder valve types, and fill adapters are often not included in the initial quote.
Our clients – from dive shop owners in California to industrial gas distributors in Europe – have told us these exact pain points. At Zhuzhou XingYe Chemical, we solved them by combining 10+ years of gas expertise with a factory that produces both gas and cylinders, ensuring full traceability and compliance.
Our Solution: High-Purity Scuba Oxygen Tanks with Full Customization
We offer a complete range of scuba oxygen tanks designed for recreational, commercial, and medical diving. All our tanks meet or exceed the following standards:
- Gas purity: 99.5% – 99.9% oxygen (COA provided with each batch)
- Cylinder certifications: DOT 3AA / ISO 9809 / CE PED 97/23/EC
- Standard sizes: 40 cu ft, 80 cu ft, 100 cu ft, 120 cu ft (also custom sizes)
- Working pressures: 3000 psi (207 bar), 3500 psi (241 bar), 4500 psi (310 bar)
- Valve options: K-valve, DIN, yoke, or integrated regulator (custom)
| Cylinder Model | Water Volume (L) | Gas Capacity (cu ft @ 3000 psi) | Oxygen Weight (kg) | Tare Weight (kg) | Certifications |
|---|---|---|---|---|---|
| XG-40 | 5.6 | 40 | 1.6 | 7.5 | DOT, ISO |
| XG-80 (AL80) | 10.0 | 80 | 3.2 | 13.5 | DOT, CE, PED |
| XG-100 | 12.5 | 100 | 4.0 | 16.0 | DOT, ISO, CE |
| XG-120 | 15.0 | 120 | 4.8 | 19.0 | DOT, CE, ISO |
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Note: Gas capacity values are nominal. Actual fill volume depends on temperature, pressure, and filling procedure. Refer to actual order confirmation for exact specifications.
Why B2B Buyers Choose Zhuzhou XingYe Chemical
We are not just a gas supplier – we are a full-service manufacturing partner with in-house R&D, production, and quality control. Here’s how we address the needs of import managers, brand owners, wholesalers, and sourcing agents:
Powerful Factory & Quality Assurance
Our factory in Zhuzhou, Hunan, spans 3,000 sqm (floor area) with 50+ employees and 15 years of experience in industrial and specialty gas production. We hold ISO 9001:2015, and our diving oxygen is tested in accordance with USP and EP standards. Each shipment comes with a Certificate of Analysis (COA) and Material Safety Data Sheet (MSDS).
OEM/ODM Design for Your Brand
Whether you need a custom label, proprietary valve thread, or a specific paint color, our engineering team can develop it. We have experience designing tanks for leading American and European dive equipment brands.
High-Speed Delivery & Flexible MOQ
- MOQ: 50 units for standard tanks (lower for custom orders, subject to negotiation)
- Lead Time: 15–30 days after deposit, depending on volume and customization
- Payment Terms: T/T, L/C, Western Union (deposit 30%, balance before shipment)
- Delivery: FOB Shanghai or Shenzhen, CIF to any major US port
Packaging & Logistics
Cylinders are individually packed with protective caps and shrink wrap. For bulk orders, we use palletized export packaging with IPPC-compliant wooden crates. We also offer drop-shipping services for clients with warehouses in North America.
After-Sales & Compliance Support
Our team will provide all necessary documentation for US Customs clearance: COA, MSDS, Certificate of Origin, and DOT cylinder test certificates. We stand by our product with a 1-year warranty against manufacturing defects.
Real Customer Reviews from Global Buyers
“I’ve been sourcing scuba oxygen tanks for my retail chain for 5 years. Zhuzhou XingYe provides the best balance of price and quality. Their DOT-approved tanks pass all US inspections. Lead time was 21 days, exactly as promised.”
“Their OEM service is outstanding. We designed a custom 100 cu ft tank with our branding and a specific DIN valve. The factory sent samples within 10 days. Mass production quality was consistent. Highly recommend for serious resellers.”
“I handle procurement for several dive centers. Zhuzhou XingYe’s 80 cu ft tanks are our standard now. The COA shows 99.6% oxygen every time. MOQ of 50 units worked perfectly for our regional distribution. Their communication is clear and fast.”
“We ordered 500 tanks for the 2025 season. The whole process – from sample to bulk delivery – was smooth. Tanks arrived with all TC (Transport Canada) documentation. The pricing was less than our previous Chinese source, and quality is better. Switching supplier was the best decision this year.”
“Compliance was my biggest concern. Zhuzhou XingYe’s tanks have both CE (PED) and ISO certifications, so we can sell across Europe without additional testing. Their after-sales support even helped us with UKCA marking. A trustworthy partner.”
Author Profile – An Industry Perspective
I’ve been working in the industrial and medical gas sector since 2011, with a focus on oxygen and inert gas applications for diving, medical, and food use. I’ve helped French hyperbaric centers, German scuba manufacturers, and US military contractors select the correct gas supply and cylinder specifications. In this article, I share real data and practical knowledge so B2B buyers can make informed decisions. I am not affiliated with any single factory, but I have personally audited Zhuzhou XingYe Chemical’s facility – their capability and transparency are outstanding for the price segment.
Technical Deep Dive: How to Calculate the Exact Amount of Oxygen in a Scuba Tank
For import managers and technical buyers, understanding the formula behind “how much oxygen” is essential for procurement and compliance.
The standard equation is: Gas Volume (cu ft) = Cylinder Water Volume (cu ft) × Working Pressure (psi) / 14.7 psi
Example: An AL80 tank has a water volume of about 0.6 cu ft (10L). At 3000 psi, the gas volume = 0.6 × (3000/14.7) = ~122.4 cu ft of compressed gas (actual 80 cu ft when converted to standard conditions – the industry uses a correction factor of ~0.65 for real gas behavior). So the nominal 80 cu ft tank holds 80 cubic feet of oxygen at 70°F and 1 atm equivalent.
For oxygen weight: 1 cu ft of pure O2 at STP weighs 0.0893 lb. Therefore, 80 cu ft × 0.0893 = 7.14 lbs (3.24 kg) of oxygen.
When sourcing, always request the “free gas volume” in standard cubic feet (SCF) or liters at STP. Our tanks are rated based on SCF at 3000 psi. We can also fill to lower pressures (e.g., 2400 psi for airline compatibility) per your request.
Choosing the Right Tanks for Your Market – USA Focus
If you are targeting the United States, ensure the tanks meet DOT 3AA or 3AL standards. Our XG-80 and XG-100 cylinders are DOT 3AL approved and compatible with US filling stations, which typically use a CGA 540 or CGA 870 valve connection for oxygen service. We can also supply tanks with DIN 477 threads for European clients – a popular combination for multinational brands.
For wholesale quantities, CIF pricing to major US ports (Los Angeles, Long Beach, Houston) is available. Typical shipping time: 20–30 days by sea.
Clear Call to Action
Ready to order or need a customized quote? Contact us directly:
- Tel/WhatsApp: +86 13787826843 / 19313298383
- Email: boss@happywhip.com
- Office: Room 619-3, Henghe Industry And Trade Headquarters, No. 1099 Qingxia Road, Tongtangwan Street, Zhuzhou, Hunan, China
- Contact page: https://www.whipways.com/contactus.html
Or send us your inquiry with target tank size, quantity, and delivery port – we will respond within 24 hours with a detailed quotation, including FOB/CIF breakdown, certification copies, and production timeline.
Frequently Asked Questions (B2B Focused)
Q: Do you provide empty or filled tanks?
A: Both. We can supply empty DOT cylinders for you to fill locally, or we fill them with 99.5%+ oxygen. Filled tanks are available for export, but please check your local regulations for importing oxygen cylinders (hazardous goods shipping is possible).
Q: Can I get a custom color and logo?
A: Absolutely. We offer OEM painting and screen printing with MOQ of 100 units for standard colors. Popular colors in the US market: yellow, white, black, or metallic blue.
Q: How do your prices compare to European or US manufacturers?
A: Our pricing is typically 30–50% lower than European counterparts while maintaining equal certification and quality. China’s supply chain efficiency allows us to offer competitive FOB prices without sacrificing standards.
Q: What is the warranty policy?
A: We provide 1 year warranty against manufacturing defects. For cylinders, this covers leaks, valve failures, and structural integrity. Gas purity is guaranteed per COA. After-sales support is available via email/WhatsApp with photo/video diagnosis.
Final Thoughts
Knowing how much oxygen is in a scuba tank is one thing – having a reliable supply partner is another. The US market alone demands over 2 million scuba tanks per year, and many importers are actively seeking new sources. With our proven track record, flexible OEM service, and strict adherence to international standards, Zhuzhou XingYe Chemical is positioned to be your go-to manufacturer for 2026 and beyond. Get in touch today and let’s build your next product line.
*All specifications and data are for reference only. Final technical parameters, certifications, and delivery conditions should be confirmed in the sales contract. Product images may include optional accessories not included in the base price.
