QF2A cylinder valve-flapper type Oxygen Valve

With more than two decades of expertise in valves, BluNet specializes in fire valves, LPG cylinder valves, industrial gas cylinder valves, and medical gas valves – totaling more than 200 varieties of valves and related accessories.

What is a cylinder valve?
A valve is an instrument that controls, regulates, or directs the flow of fluids (liquids, gases, fluidized solids, or slurries) by opening, shutting, or partially blocking various passageways.
Technically, valve fittings are also called Valves. However, they are often referred to as a separate category. Fluid flows from higher pressure towards a lower pressure in an open valve.

A simple and ancient form of valve is a free-hinged flap that drops to block fluid (gas or liquid) flowing in one direction but is pushed open by flow in the opposite direction.
This type of device is known as a check valve since it acts to “check” or prevent any flow in one direction.

Gas Valve Features:

Our QF-2G O2 tank valve boasts a long service life.
After many tests, this Oxygen control valve proved resistant to corrosion, high temperature, and high-pressure environments.
BluNet conducted air tightness tests, so you can confidently rely on using our QF-2G 15MPa air-gas valves.

BluNet valves are tested for global market conditions, from the Artic cold at -40°C to +65°C for Equatorial regions
Adding a unique protective O ring on the opening mechanism protects the valve against the elements and increases its environmental resistance.
A full array of regional connections is available
Working Pressures up to 300 bar
ISO 9001 Quality Assured
The new range conforms to the Transportable Pressure Equipment Directive 2010/35/EU (TPED) and is type tested to ISO 10297 and ISO 15996 to provide a 15 Year maintenance-free Service Life.

At BluNet, we hold international certifications such as CCS, CE, TPED, EN3, VDE, and ECE-R110, along with NSEML (National Special Equipment Manufacturing License).

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Shipping & Delivery

BluNet provides reliable and fully documented global shipping solutions for industrial gas cylinders, cryogenic equipment, and related systems. Our logistics services are designed specifically for B2B international trade, ensuring secure, compliant, and efficient delivery to your designated facility or project site.

Estimated transit times are based on standard international sea freight schedules and do not include production lead time, export documentation processing, customs clearance, or local delivery arrangements. Actual delivery times may vary depending on destination, order quantity, carrier availability, port conditions, and customs procedures.

Europe: 25 – 40 days via sea freight
North America: 25 – 40 days via sea freight
Asia: 7 – 15 days via sea freight
Middle East & Africa: 20 – 35 days via sea freight
Australia: 20 – 35 days via sea freight

Due to international transportation regulations for pressure vessels and industrial gases, BluNet primarily arranges shipments via sea freight.

We support international trade terms including EXW, FOB, CIF, CFR, DAP, and DDP, depending on your procurement and logistics requirements.

Unless otherwise agreed in writing, import duties, taxes, customs clearance charges, and destination handling fees are the responsibility of the buyer. BluNet will provide the required export and shipping documentation, including commercial invoice, packing list, bill of lading, certificate of origin, and product certifications if required.

Shipment tracking information will be provided once the goods are dispatched, allowing full visibility of the shipment throughout transit.

Returns & Refunds

At BluNet, we are committed to supporting our international partners with reliable products and professional service. In the event of product discrepancies or shipment damage, our structured return and replacement process helps minimize disruption to your operations.

Return Guidelines:

Return requests must be submitted within 14 days of product receipt.
Products must remain unused and in their original packaging unless the issue involves manufacturing defects or shipping damage.
Damaged or defective items must be documented with photographs and relevant shipping documents.
Custom-made, pressure-certified, or specially configured products may not be eligible for return unless confirmed as defective.

Once a return request is reviewed and approved, BluNet may provide replacements, credit notes, or refunds according to the agreed trade terms and order conditions. Refunds are processed through the original payment method or applied toward future orders where applicable.

Please note that freight charges, customs duties, taxes, and destination handling fees are non-refundable unless the issue is confirmed to result from manufacturing defects or shipment errors caused by BluNet.

For assistance with shipping, export documentation, returns, or order support, please contact our international sales team:

📧 info@gaseschina.com
🌐 www.gaseschina.com

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Gas Valves, QF2A cylinder valve