Gas Cylinder Valve
Your Professional Gas Cylinder Valve Supplier
Shanghai Luzhen SCM Co., Ltd. supplies gas cylinder valves and related components for LPG and selected industrial gas applications.
Cylinder valves are safety-critical components. A suitable valve cannot be selected by appearance or nominal thread size alone. The gas service, cylinder design, working conditions, inlet and outlet connections, sealing materials, pressure-relief requirements and destination-market regulations must all be confirmed before an order is placed.
Our product scope can include:
- Manually operated LPG cylinder valves
- Self-closing LPG cylinder valves
- Compact and clip-on LPG valves
- Industrial gas cylinder valves
- Dual-outlet or application-specific LPG valves
- Valves incorporating pressure-relief devices where required
- Residual pressure valves for specified industrial gas applications
- Fusible plugs and approved safety components
- Valve handwheels, spindles, seals and related parts
What Is a Gas Cylinder Valve?
A gas cylinder valve is installed in the cylinder’s threaded valve boss or neck ring and provides a controlled connection between the gas inside the cylinder and the filling or withdrawal system. Its primary functions are to:
Provide a secure closure for the cylinder
01
Control gas filling and withdrawal
02
Maintain a gas-tight seal when closed
03
Connect the cylinder to compatible filling or consuming equipment
04
Support additional functions when specifically designed, such as excess-flow control, residual-pressure retention or pressure relief
05
A cylinder valve is not normally a pressure regulator. The valve opens or closes the gas passage, while a compatible regulator is generally used when stable downstream pressure is required.
Main Types of Cylinder Valves
Manually Operated LPG Cylinder Valves
Manually operated valves use a handwheel or operating mechanism to open and close the gas passage.
They are commonly used on refillable domestic, commercial and industrial LPG cylinders. The correct inlet thread, outlet connection, sealing arrangement and safety configuration depend on the cylinder design and destination market.
Specifications and testing requirements for dedicated manually operated LPG cylinder valves may be covered by standards such as ISO 15995 or the applicable regional or national standard.
Self-Closing LPG Cylinder Valves
A self-closing valve is designed to close automatically when the regulator or connector is removed.
These valves are frequently used in household LPG applications where quick connection and convenient cylinder exchange are required. The valve and regulator must be selected as a compatible system.
Dedicated self-closing LPG cylinder valves may be specified according to ISO 14245 or another applicable market standard.
Industrial Gas Cylinder Valves
Industrial gas cylinder valves are used for compressed, liquefied or dissolved gases such as oxygen, nitrogen, argon, carbon dioxide and other specified gases.
Valve design and materials must be compatible with the intended gas service. Inlet threads, outlet connections and cleanliness requirements vary significantly between gases and markets.
ISO 10297 is one of the principal international standards covering the design, type testing and marking of many refillable gas cylinder valves. Dedicated LPG valves are covered separately.
Residual Pressure Valves
Residual pressure valves are designed to retain a small positive pressure inside the cylinder after use. This function can help reduce the entry of air, moisture or contaminants.
Some residual pressure valves also include a non-return function. Their suitability must be confirmed according to the gas service, filling process and applicable standard. ISO 15996 addresses cylinder valves incorporating residual-pressure devices.
Valves with Pressure-Relief Devices
Depending on the gas, cylinder design and regulatory requirements, a valve may incorporate a pressure-relief valve, rupture disc, fusible element or another approved device.
A pressure-relief device is not universally required or universally prohibited. Its type and operating parameters must be selected according to the applicable cylinder standard, gas service and regulations of the destination market.
Key Technical Parameters
The following information should be confirmed before selecting or manufacturing a cylinder valve:
Parameter |
Typical Options or Requirements |
Gas service |
LPG, propane, butane, oxygen, nitrogen, argon, CO₂ or another specified gas |
Valve operation |
Manually operated, self-closing or application-specific |
Body material |
Brass, forged brass or another approved material |
Cylinder inlet |
Parallel or taper thread according to the approved cylinder drawing |
Valve outlet |
Threaded, clip-on, quick-connect or market-specific connection |
Sealing materials |
Selected according to gas compatibility, temperature and operating conditions |
Working conditions |
Confirmed from the cylinder design and applicable valve specification |
Flow direction |
Vapour withdrawal, liquid withdrawal or filling application |
Safety device |
PRV, rupture disc, fusible element, excess-flow device or none, as specified |
Surface finish |
Natural brass, plated or another specified finish |
Marking |
Manufacturer identification, batch code, valve model and required conformity marks |
Documentation |
Drawing, inspection report, material documentation and other agreed records |
Thread descriptions must include the complete thread designation. A nominal diameter alone is not sufficient because threads can differ in pitch, taper, profile, sealing method and gauge requirements.
Frequently Asked Questions
Request a Valve Technical Review
Send us your valve drawing, cylinder specification or existing valve sample information.
Our team will review the application and coordinate a technical and commercial proposal based on the confirmed gas service, connections, safety requirements and destination market.
Shanghai Luzhen SCM Co., Ltd.
Email: bao@lu-chain.com
Email: ivy@lu-chain.com
WhatsApp: +86 159 2172 4860
WhatsApp: +86 158 0058 3610
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As one of the most professional gas cylinder valve manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to buy bulk discount gas cylinder valve from our factory. We also accept customized orders.
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