Medical Oxygen Tanks – M6, D, & E Cylinders

Medical Oxygen Tanks – M6, D & E Oxygen Cylinders Purchase a medical oxygen tank from State Medical Equipment in your choice of M6, D, or E cylinder size. These reusable medical oxygen cylinders provide different combinations of oxygen capacity, physical size, and portability. The compact M6 prioritizes portability, the D cylinder provides a balance between capacity and size, and the larger E cylinder provides the greatest oxygen capacity of the three options. Medical oxygen cylinders store compressed oxygen and require the appropriate compatible oxygen regulator or oxygen-conserving device for controlled oxygen delivery. Need help choosing a cylinder or confirming regulator compatibility? Contact State Medical Equipment: State Medical Equipment 3950 East Sunset Road, Suite 112 Las Vegas, NV 89120 Call: 702-538-9555 Email: help@statemedicalequipmentlv.com A valid prescription is required for medical oxygen. Available Oxygen Tank Sizes Cylinder Approx. Oxygen Capacity Best For M6 Oxygen Tank Approximately 165–170 L Maximum portability D Oxygen Tank Approximately 425 L Balance of portability and capacity E Oxygen Tank Approximately 680 L Longer duration / greater capacity Actual cylinder dimensions, weight, pressure rating, valve configuration, and capacity can vary by manufacturer and cylinder configuration. Key Features Three Cylinder Sizes – Choose from M6, D, or E medical oxygen cylinders. 165–680 L Approximate Capacity Range – Select a cylinder based on prescribed oxygen needs and portability requirements. Reusable Oxygen Cylinders – Designed to be appropriately refilled and reused rather than discarded after a single use. Portable Oxygen Options – M6, D, and E cylinders provide different balances of physical size, weight, and oxygen capacity. Compressed Medical Oxygen Storage – Designed for use as part of a prescribed medical oxygen system. Compatible with Oxygen Regulators & Conservers – Requires appropriately matched oxygen-delivery equipment. CGA 870 Commonly Used on Portable Cylinders – Exact valve configuration must be confirmed for the cylinder being purchased. Carrying Accessories Available – Compatible bags, carts, and wheelchair cylinder holders may be available depending on cylinder size. Local Las Vegas Supplier – Available through State Medical Equipment in Las Vegas, Nevada. Which Oxygen Tank Size Should I Choose? The primary differences between M6, D, and E cylinders are oxygen capacity, physical size, weight, and portability. M6 – Smallest & Most Portable Choose an M6 oxygen tank when keeping the cylinder small and lightweight is a priority. Typical capacity is approximately 165–170 liters of oxygen, depending on the cylinder manufacturer and configuration. Its compact dimensions make the M6 suitable for use with an appropriately sized carrying bag. D – Portable with More Oxygen Capacity A D oxygen tank provides substantially greater oxygen capacity than an M6 while remaining a portable cylinder. Typical capacity is approximately 425 liters. This makes the D size a useful middle option for users who want greater capacity without moving to the larger E cylinder. E – Greatest Capacity of These Three Sizes An E oxygen tank typically contains approximately 680 liters of oxygen, providing the greatest capacity of the three cylinder sizes offered on this page. Because an E cylinder is taller and heavier than an M6 or D cylinder, it is commonly paired with an appropriately sized oxygen cylinder cart or wheelchair cylinder holder rather than carried for extended periods. M6 Oxygen Tank The M6 medical oxygen cylinder is designed for users who prioritize portability. Typical M6 aluminum cylinder specifications are approximately: M6 Specification Typical Value Oxygen Capacity Approximately 165–170 L Diameter Approximately 3.2" Height Approximately 11.6–11.8" Empty Weight Approximately 2.2–2.3 lbs. Exact specifications depend on manufacturer, valve, and cylinder configuration. D Oxygen Tank The D medical oxygen cylinder provides a balance between portability and oxygen capacity. Typical D aluminum cylinder specifications are approximately: D Specification Typical Value Oxygen Capacity Approximately 425 L Diameter Approximately 4.4" Height Approximately 16.5–16.7" Empty Cylinder Weight Approximately 5.3–6.3 lbs., depending on configuration Exact specifications depend on manufacturer, valve, and cylinder configuration. E Oxygen Tank The E medical oxygen cylinder provides the greatest oxygen capacity among the M6, D, and E sizes on this page. Typical E aluminum cylinder specifications are approximately: E Specification Typical Value Oxygen Capacity Approximately 680 L Diameter Approximately 4.4" Height Approximately 25" Empty Cylinder Weight Varies by manufacturer and configuration Because of its greater size and capacity, many users transport an E cylinder using a compatible oxygen cart or wheelchair cylinder holder. Specifications Specification Details Product Type Medical Oxygen Cylinder / Oxygen Tank Available Sizes M6, D, E Product / Part # Varies by manufacturer and selected cylinder M6 Oxygen Capacity Approximately 165–170 L D Oxygen Capacity Approximately 425 L E Oxygen Capacity Approximately 680 L Cylinder Material Typically aluminum; confirm specific inventory Gas Type Compressed Medical Oxygen when supplied filled Valve Connection Varies; CGA 870 is common on portable medical oxygen cylinders Reusable / Refillable Yes, through an appropriate medical oxygen filling service Regulator Required Yes Prescription Required for Medical Oxygen Yes How Long Does an Oxygen Tank Last? The amount of time an oxygen cylinder lasts depends primarily on: Cylinder capacity Prescribed oxygen flow rate Remaining cylinder pressure Continuous-flow versus compatible conserving delivery Regulator or conserving-device configuration For a fully charged cylinder using continuous flow, approximate theoretical duration can be estimated by dividing available oxygen capacity by the prescribed flow rate. Cylinder Approx. Capacity At 1 LPM* At 2 LPM* At 3 LPM* M6 170 L ~2 hr. 50 min. ~1 hr. 25 min. ~55 min. D 425 L ~7 hr. 5 min. ~3 hr. 30 min. ~2 hr. 20 min. E 680 L ~11 hr. 20 min. ~5 hr. 40 min. ~3 hr. 45 min. These are simple capacity-based estimates for comparison, not guaranteed clinical runtimes. Actual usable duration can vary with starting pressure, regulator, reserve pressure, cylinder fill, equipment configuration, and other factors. An appropriate oxygen-conserving device may extend cylinder duration for patients whose prescribed setup allows its use, but conserving-device performance varies and is not equivalent to continuous flow. Never reduce a prescribed oxygen flow rate simply to make a cylinder last longer. Continuous Flow vs. Oxygen Conserving Devices A standard continuous-flow regulator releases oxygen continuously at the selected prescribed flow rate. An oxygen-conserving device is designed to reduce unnecessary oxygen use by delivering oxygen in response to breathing rather than releasing the same continuous flow at all times. This can substantially affect cylinder duration. However, conserving devices are not appropriate for every patient or every prescription, and their settings should not automatically be treated as equivalent to continuous-flow LPM. State Medical Equipment can help identify compatible equipment, but oxygen delivery should always follow the patient's prescription and healthcare provider's instructions. Regulator & Oxygen Conserver Compatibility An oxygen cylinder cannot simply be connected directly to a nasal cannula. The high-pressure oxygen stored inside the cylinder requires compatible pressure-regulating equipment to provide controlled oxygen delivery. Depending on the prescribed setup, equipment may include: Oxygen regulator Oxygen-conserving device Pressure gauge Nasal cannula Oxygen tubing Cylinder wrench when applicable Carrying bag Oxygen cylinder cart Wheelchair oxygen holder Many portable medical oxygen cylinders use a CGA 870 post-valve connection, but valve configurations vary. Confirm the valve on the actual cylinder before purchasing a regulator or conserving device. Filled vs. Empty Oxygen Cylinders An important distinction when purchasing an oxygen tank is whether the cylinder is being sold: Filled with medical oxygen, or As an empty cylinder requiring filling The cylinder itself and the prescription medical oxygen it contains are not necessarily the same retail item or service. Contact State Medical Equipment before ordering to confirm whether the selected M6, D, or E cylinder is supplied filled or empty, current fill/refill requirements, and what documentation is required. Refilling Your Oxygen Cylinder Medical oxygen cylinders should only be filled through an appropriate medical oxygen supplier or filling service. Do not attempt to fill a medical oxygen cylinder using equipment or gases that are not specifically approved for the intended medical oxygen system. Before purchasing, customers who expect to refill the cylinder regularly should confirm: Available local refill options Cylinder ownership requirements Valve compatibility Cylinder inspection/requalification status Prescription requirements Whether the filling provider accepts customer-owned cylinders State Medical Equipment can provide current information about the services available for cylinders purchased through our store. Prescription Required for Medical Oxygen A valid prescription is required for medical oxygen. The prescribed oxygen therapy may specify information such as flow rate, frequency, duration, or delivery method. Oxygen should only be used according to the patient's prescription and healthcare provider's instructions. Do not increase or decrease the prescribed flow rate based solely on desired cylinder runtime. Oxygen Tank Purchase vs. Rental This page is intended for customers looking to purchase an oxygen cylinder. State Medical Equipment also offers separate oxygen-equipment rental options for customers who need equipment temporarily in the Las Vegas area. Purchasing may be appropriate when ongoing cylinder ownership is desired, while rental may make more sense for temporary needs. Contact State Medical Equipment if you're unsure which option better fits your equipment needs. Compatible Oxygen Cylinder Accessories Depending on the selected M6, D, or E cylinder and its valve configuration, compatible accessories may include: Continuous-flow oxygen regulator Oxygen-conserving device Nasal cannula Oxygen tubing M6 carrying bag D-cylinder carrying bag E-cylinder cart Wheelchair oxygen cylinder holder Cylinder stand or rack Accessories should be matched to the exact cylinder size and valve configuration before purchase. Important Oxygen Safety Medical oxygen supports combustion and requires careful handling and storage. No smoking or vaping around oxygen equipment. Keep cylinders away from flames, sparks, heat, and other ignition sources. Never use oil, grease, petroleum jelly, or other petroleum-based products on oxygen valves, regulators, or fittings. Keep cylinders properly secured to prevent them from falling, rolling, or being damaged. Protect cylinder valves from impact. Use only regulators, conserving devices, and accessories compatible with the cylinder. Open and operate valves according to the cylinder and regulator manufacturer's instructions. Store oxygen cylinders in an appropriately ventilated location. Do not modify, disassemble, or attempt to repair a cylinder or cylinder valve yourself. Follow all manufacturer instructions and the patient's prescribed oxygen settings. Frequently Asked Questions What oxygen tank sizes does State Medical Equipment offer? This product page covers M6, D, and E medical oxygen cylinders. Which oxygen tank is the smallest? The M6 is the smallest of these three sizes and typically contains approximately 165–170 liters of oxygen. How much oxygen does a D tank hold? A typical D medical oxygen cylinder holds approximately 425 liters. How much oxygen does an E tank hold? A typical E medical oxygen cylinder holds approximately 680 liters. Which tank lasts the longest? At the same flow rate and comparable starting pressure, the E cylinder generally lasts longest because it contains the greatest amount of oxygen of these three sizes. How long does an E oxygen tank last at 2 LPM? Using 680 liters as a simple capacity estimate, approximately 5 hours 40 minutes at 2 LPM continuous flow. Actual usable duration can vary. Do I need a regulator? Yes. A high-pressure medical oxygen cylinder requires compatible equipment to regulate oxygen pressure and delivery. Can I use the same regulator on M6, D, and E tanks? Possibly, if the cylinders have the same compatible valve connection and the regulator is appropriate for the prescribed setup. Do not assume compatibility based on cylinder size alone. Do these cylinders use CGA 870 valves? CGA 870 is commonly used on portable medical oxygen cylinders, including many M6, D, and E configurations. The actual valve must be confirmed on the cylinder being purchased. Can oxygen tanks be refilled? Yes. Reusable medical oxygen cylinders can be refilled through an appropriate medical oxygen filling service, subject to cylinder condition, inspection/requalification requirements, and the filling provider's policies. Does the cylinder come filled with oxygen? This must be confirmed for the specific SME inventory and purchase configuration. Contact State Medical Equipment before ordering to determine whether the selected cylinder is supplied filled or empty. Can I carry an M6 oxygen cylinder? Its small size makes the M6 well suited to compatible carrying bags when appropriate for the user. What is the easiest way to move an E oxygen cylinder? Because of its larger size, an E cylinder is commonly transported with a compatible oxygen cylinder cart or wheelchair cylinder holder. Do I need a prescription? A valid prescription is required for medical oxygen. Need Help Choosing an M6, D or E Oxygen Tank? Choosing the right medical oxygen cylinder involves more than selecting the largest tank. Consider the patient's prescribed flow rate, expected time away from another oxygen source, cylinder weight, portability requirements, regulator or conserving-device compatibility, and refill needs. State Medical Equipment can help you compare the available cylinder sizes and compatible equipment before you purchase. Contact State Medical Equipment Have questions about M6, D, or E medical oxygen tanks, regulators, conserving devices, carrying equipment, refills, or cylinder compatibility? Contact us before ordering. State Medical Equipment 3950 East Sunset Road, Suite 112 Las Vegas, NV 89120 Call: 702-538-9555 Email: help@statemedicalequipmentlv.com A valid prescription is required for medical oxygen.