How many shut-offs are typically found for gas supplied at high pressure?

Typically, when dealing with gas supplied at high pressure in various systems, there are usually two primary shut-off valves involved. The first shut-off is located upstream of the pressure-regulating equipment, serving to isolate the high-pressure supply from the rest of the system. The second shut-off valve is positioned downstream of the regulator, allowing for the isolation of the lower pressure side of the system from the downstream components.

This two-valve system is critical for ensuring safety and maintainability. It allows operators to perform necessary maintenance or adjustments while minimizing the risk of gas leaks. Having two shut-offs enhances the effectiveness of operational procedures, ensuring that any potential issues can be addressed without compromising the entire gas supply system.

The presence of only one, three, or four shut-offs would not align with the standard practice for applications involving high-pressure gas supplies. Therefore, the typical configuration involves these two shut-offs to facilitate effective control and safety in gas management systems.