There are many valves used on gas systems that are available. The most common gas valves that Norgas supplies are plug valves and ball valves. These are simply used as manual shut-off valves used on piping systems at various operating pressures. Also called two-way valves simply meaning that they are either open or closed. We can also offer three-way valves, which are not shutoff valves, used as a diverter to change piping orientation of flow.
Our cast iron plug valves are lubricated type and very commonly used on all types of gases. Even though the valve is metal sealed, it uses a lubricant also known as a sealant to achieve a tight shut-off when in the closed position. Lubricated plug valves are excellent for in-line maintenance as it can be injected with more sealant while still pressurized in the line.
Our ball valves are available in many different materials depending on the application and pressure rating required. We can handle all types of gases , natural, propane, compressed, and corrosive gases, as well as fluids to meet your application needs. Most ball valves do not require any maintenance but when they eventually leak, they can simply be replaced or possibly fixed with a repair kit that can be purchased.
Our customized fusible-link shutoff valves, also referred to as thermal shutoff valves, are ideal for any application handling gases and flammable liquids. Typically installed on ball valves, these gas valves offer great safety in case of a fire and close once the fusible link has melted to the desired temperature. Option of fail open is also available.
Our earthquake-actuated automatic gas shutoff valves are ideal for shutting off gas during an earthquake and its simple design will help protect you from fire or even an explosion. Largely used for commercial and industrial applications, seismic valves are installed on the main line of any building or manufacturing plant. Our seismic valves are not sensitive to vibrations caused by passing trucks or accidental bumping.
Many options can be added to various valves including locking devices, limit switches and actuation. Let NORGAS help you select the right gas valve for your application.