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Scuba diver carrying lightweight 6.8L carbon fiber tank underwater

Acecare 4500 PSI DOT Certified 6.8L Carbon Fiber Tank (65CF) – with Normal Valve

Name: Acecare 6.8L 4500 PSI Carbon Fiber Tank | DOT Certified Scuba & PCP Cylinder
Brand: Acecare
SKU: ACE-6.8L-4500PSI
Price: 399.00 USD
Availability: InStock

Original price was: $500.00.Current price is: $458.00.

Upgrade your dive or scuba diving setup with the Acecare 6.8L 4500 PSI Carbon Fiber Tank.

Engineered from aerospace-grade carbon fiber with an aluminum liner, this DOT-certified cylinder delivers maximum pressure capacity at a fraction of the weight of steel tanks.

Perfect for scuba divers and professionals who demand reliable performance.

In stock

Size equivalents: 6.8 L water volume ≈ 415 cu in · gas capacity ≈ 72 cu ft at 300 bar · 45-min SCBA rating · full size chart

Why Buy From Acecare

Ships in 1–2 Business Days from US Warehouse
30-Day Easy Returns
Expert Customer Service
Tracking Info Provided After Shipment

Guaranteed Safe And Secure Checkout

4500 PSI Carbon Fiber Tank – Acecare 6.8L Lightweight Scuba & Cylinder (DOT Certified) with Normal Valve

⭐Product Showcase Video:

🎥 Customer video: assembly & first fill

Watch this video on YouTube

⭐Production Process

⭐Superior Material & Construction

Acecare Tech specializes in the production of portable gas cylinders using advanced technology. Unlike traditional steel respirators, our cylinders are made from lightweight aluminum or aluminum composite materials. This results in a 40%–70% reduction in weight, making them ideal for people with respiratory conditions.

Thanks to their lightweight and durable design, our cylinders serve a wide range of uses. They are widely adopted in scuba diving and other recreational fields. These cylinders are used to fill smaller tanks with compressed air for storage, which is far more convenient and efficient than relying on an on-site compressor.

We craft every gas cylinder liner from high-quality 6061 aluminum alloy. The production process includes punching, drawing, heat treatment, CNC flow forming spinning, and specialized inner surface treatment. This guarantees consistent wall thickness and minimal variance across all units.

Each cylinder is built from composite materials for maximum strength and storage capacity. The structure consists of four protective layers:

Aluminum liner
Carbon fiber wrap
Glass fiber wrap
Outer gel protection

This multi-layer design offers outstanding pressure resistance and long-term durability.

These cylinders are composed of composite materials, offering exceptional pressure resistance and high-volume storage capabilities. They are structured into four distinct layers: the first being an aluminum liner, the second a carbon fiber wrap, the third a glass fiber wrap, and the fourth a gel protection layer.

15-year lifetime warranty;
5-year requalification period; 15-year life;
High Quality, Light-weight, Smooth, easy-care exterior finish.

⭐Real-World Applications

Scuba Diving (Scene 1):

With a 6.8L cylinder, you can fill a 280cc tank in just 5–15 seconds, achieving 6–7 fills per session.

Respiratory Use (Scene 2):
Our cylinders are used in firefighting, technical diving, and emergency air supply. They support mixed gases like He2 + N2 + O2, making them suitable for land and marine applications.

Innovation & Research (Scene 3):
We’re proud to support fuel cells (H2), aerospace, and university laboratories—helping to drive the future of science and energy.

⭐ Frequently Asked Questions

1. What does DOT certification mean?
DOT (U.S. Department of Transportation) certification means this cylinder meets strict US federal safety standards for high-pressure vessels. A DOT-marked cylinder can be legally filled, transported, and used in the United States.

2. How often does the tank need to be retested?
DOT carbon fiber cylinders must pass a hydrostatic retest every 5 years. Always check the retest date stamped on the tank label before refilling.

3. Will US dive shops or fill stations refill it?
Yes. As a DOT-certified cylinder within its valid hydro date, it is accepted for refills at most US dive shops and high-pressure fill stations.

4. What is the valve thread size?
M18x1.5 — the standard thread for this cylinder series.

5. Is the valve included?
Yes. This listing includes the 6.8L tank with a normal valve (M18x1.5) installed and ready to use.

6. How much does the empty tank weigh?
The empty 6.8L cylinder weighs about 3.9 kg (8.6 lb); the valve adds only minimal extra weight.

⭐Company introduction

Shenyang Acecare Technology Co., Ltd. deals with the import & export of machinery, equipment, and cylinder products. Acecare is involved in all kinds of business concerning cylinders. We have extensive business contact with customers in more than 150 countries and regions all around the world. We look forward to cooperating with friends from all over the world helping each other and developing great causes together for our mutual benefit.

Acecare will do its best to give you the ACE CARE:

1. We value your inquiry and will reply within 24 hours.
2. We focus on your needs and continuously improve our expertise to serve you better.
3. We care about your concerns and will do our best to address them.
4. Our business relationship will be kept strictly confidential and never disclosed to any third party.
5. We aim for long-term cooperation, backed by dependable after-sales service.

Overseas Warehouse: Chico California US/Ontario California US
Email: [email protected] Whatsapp: +1 949 337 8576/+86 134 7835 1496

Youtube:
https://www.youtube.com/@acecaretech1859

Ins:
https://www.instagram.com/acecareksa/

Facebook:
https://www.facebook.com/acecaretech2016

⭐Certifications & Service Life

DOT Certified 6.8L / 4500 PSI carbon fiber air cylinder (65CF) — as listed in the product title.
Service life: 15 years, with requalification (hydro retest) every 5 years.
Manufactured in 2026 — full 5-year hydro cycle ahead.

⭐Why Buy DOT-Certified

Why buy DOT-certified: A DOT-approved carbon fiber tank can be refilled at any US paintball shop, dive shop, or fire station, and hydro-tested at any US DOT test facility — CE-only cylinders cannot. This 6.8L 4500 PSI DOT carbon fiber air tank is built for PCP air rifle charging and HPA paintball fills, with normal valve fitted. Ships from our Chico, California warehouse in 1–2 business days. Questions? Contact us anytime.

🛡️ Complete the Kit — Add the AirPack Tank Bag

Protect your investment on the road. The AirPack padded backpack carrier is sized for 68/4500 HPA carbon fiber cylinders and fits 6.8L–12L tanks — including this one.
→ Shop the AirPack Tank Bag (Khaki) — $59

✅ Flexible returns — see our Return Policy · Ships from Chico, California

Weight	6 lbs

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Acecare 4500 PSI DOT Certified 6.8L Carbon Fiber Tank (65CF) – with Normal Valve