22.08.2026 09:28
Natural gas valves are used in residential, commercial and industrial installations to start, stop or isolate the flow of natural gas. Most lever-operated ball valves work by turning the handle through approximately 90 degrees.
How Can You Tell Whether the Valve Is Open or Closed?
For a typical quarter-turn ball valve:
Handle parallel to the pipe: VALVE OPEN
Handle perpendicular to the pipe: VALVE CLOSED
This is the normal operating principle of most lever-operated ball valves.
How to Open a Natural Gas Valve
1. Check for the Smell of Gas
Before operating the valve, make sure that there is no unusual or recognizable gas odor.
If you smell gas, do not attempt to open the valve.
Avoid operating electrical switches, plugs, flames, lighters or anything that could create a spark. Move away from the area when it is safe to do so and contact the appropriate gas emergency service or an authorized technician.
2. Check the Handle Position
Inspect the position of the valve handle relative to the gas pipe.
If the handle is perpendicular to the pipe, the valve is normally closed.
3. Turn the Handle Slowly
Without forcing it, rotate the handle approximately 90° until it becomes aligned with the pipe.
When the handle is parallel to the pipe, a typical ball valve is fully open.
4. Never Force a Stuck Valve
If the valve is difficult to move, corroded or completely stuck, do not use excessive force, pliers, hammers or handle extensions.
Excessive force can damage:
the valve stem,
sealing components,
pipe connections,
the gas installation.
Contact an authorized gas technician or qualified installer instead.
Should a Ball Valve Be Left Half Open?
Ball valves are primarily designed as fully open or fully closed isolation valves.
They should normally not be left in an intermediate position. If flow regulation is required, appropriate control equipment should be used.
Important Safety Precautions
Never open a valve if you smell gas.
Never use a flame to check for leakage.
Do not operate electrical switches when a leak is suspected.
Do not force a stuck valve.
Never dismantle or modify a gas installation without authorization.
Contact a professional if leakage is suspected.
Do not tamper with gas meters, regulators or sealed equipment.
Quick Reference
Handle parallel to the pipe → OPEN
Handle perpendicular to the pipe → CLOSED
Correct valve operation is essential for maintaining a safe and controlled natural gas installation.
