How many turns can quick closing valves on fuel gas cylinders be opened?

The correct answer indicates that quick closing valves on fuel gas cylinders should be opened no more than 1.5 turns. This specification is important for safety reasons. Quick closing valves are designed for rapid shut-off in emergency situations, which means they should also be managed carefully during operation to minimize the risk of gas leaks or equipment damage.

Opening the valve beyond 1.5 turns can increase the risk of inadvertently releasing excess gas, which could lead to dangerous situations such as explosions or fires if the gas comes into contact with ignition sources. By limiting the opening to 1.5 turns, operators can ensure a balance between the need for gas flow and the safety measures required to control it effectively.

Therefore, following the guideline of no more than 1.5 turns helps maintain safety protocols while handling pressurized gas systems.