Gas appliances, such as stoves and ovens, are essential in both households and commercial kitchens. But did you know that not all gas is created equal? Two of the most commonly used types of gas are Liquefied Petroleum Gas (LPG) and Natural Gas (NG) — and it's crucial that appliances are configured specifically for the type of gas they use.

QUS valve is one of the most capable Chinese gas valve suppliers. Over the past 30 years, our valves have been primarily manufactured for export, serving markets in South America, Europe, the Middle East, and many other regions. Our products are designed to meet the regulatory requirements of each market, and we have always held ourselves to the high standards demanded by international customers.

Such gas valves are always equipped with an adjustment screw. By rotating the adjustment screw, the gas valve can be tuned to suit different gas types.

The gas valve is preset by the appliance manufacturer to match the appropriate gas type before the product leaves the factory. For safety reasons, the valve is usually installed beneath the cooktop and is not meant to be adjusted by users.

Therefore, before purchasing or using a gas stove, please make sure to check whether it is designed for Natural Gas (NG) or Liquefied Petroleum Gas (LPG).

What's the Difference?

The key differences between LPG and NG lie in composition, pressure, and energy content:
LPG (typically propane or butane) is stored under pressure as a liquid and has a higher energy content per unit volume.
Natural Gas (mostly methane) is delivered via pipelines and burns at lower pressure with a different air-to-gas ratio.

Because of these differences, using the wrong gas type without proper adjustments can lead to incomplete combustion, safety risks, inefficient performance, or even damage to the appliance.

To precisely control the gas flow, a nozzle (injector/orifice) is usually installed either at the valve outlet or at the burner. Since LPG flows faster, the nozzle hole is typically smaller. On the other hand, NG (natural gas) has lower pressure and a slower flow rate, so the nozzle opening is larger.

This clearly explains why even when using the same valve, adjustments must be made when switching between different gas types — the gas flow needs to be tuned accordingly.

Why Appliance Configuration Matters

Gas burners, valves, injectors, and regulators must be tuned precisely based on the gas type. For example:
LPG requires smaller orifices due to higher energy density.
NG requires larger orifices and different air flow to burn efficiently.

That’s why manufacturers and installers must ensure the appliance is configured properly before use — and why this distinction is never optional.

QUS Valves: Flexible Solutions for LPG and NG

At QUS, we understand that flexibility is essential — especially for global markets where fuel types vary. That’s why we offer gas valves that can be easily adjusted to suit either LPG or NG, without the need to replace core components.

We follow strict quality control protocols—including 100% leakage testing (under 2.8 kPa pressure with LPG, and under 2 kPa pressure with NG), 40,000 times life-time testing, and full dimensional checks—to ensure our valves meet international standards.

Whether you’re designing for a specific region or seeking dual-fuel compatibility, our solutions help simplify production, reduce inventory complexity, and ensure safe, efficient performance.

Choose QUS — precision, flexibility, and peace of mind in every valve.