What type of valve must be provided for each DOT or TC storage cylinder?

The requirement for a manually operated container valve on each DOT or TC storage cylinder is grounded in the need for safety and control. This type of valve allows the user to easily turn the flow of natural gas on or off, providing direct regulation over the gas delivery system. It’s vital in ensuring that the gas can be safely isolated in case of emergencies, maintenance, or when the cylinder needs to be transported.

Manually operated valves are designed to be straightforward and user-friendly, offering a reliable way to control the gas flow without any dependency on automation. This is particularly important in handling compressed natural gas, which can pose risks if not managed properly.

While other types of valves, such as automatic safety valves, check valves, and pressure relief valves, serve essential functions in the overall safety system of gas delivery, they do not replace the need for a manually operated valve. Automatic safety valves may act as a fail-safe, check valves prevent backflow, and pressure relief valves protect against excessive pressure, but they do not offer the level of control that is critical for immediate response by the operator. Therefore, the inclusion of a manually operated container valve is a crucial requirement for safely handling and transporting compressed natural gas.