To ensure a continuous, smooth, safe, and efficient gas supply for insulated welding gas cylinders, there are two approaches that can be employed. You have the option to use a single cylinder to supply gas to the end-user, or you can alternate between two or more cylinders connected via a manifold system. Let’s dive into the step-by-step procedure:

1. Single Cylinder Usage:
   • Open the pressure-boosting valve on the cylinder to increase the pressure.
   • Once the cylinder pressure reaches the desired operating pressure, adjust the pressure-boosting valve accordingly (based on the working pressure required for the application).
2. Alternate Usage with Multiple Cylinders: (1) Connect multiple cylinders through a manifold system, ensuring a unified gas supply.
   • Open the gas supply valve on the manifold for the welding gas cylinder intended for use, adjusting the valve’s opening based on the system’s gas demand and pressure requirements.
   • Fine-tune the pressure-boosting valve to commence normal gas supply to the system.

   (2) Utilize the liquid content in each cylinder entirely to minimize wastage.

   • If a cylinder needs to be taken out of service for an extended period (over 8 hours), release the pressure to 70% of the working pressure (while regularly monitoring cylinder pressure to avoid dangerous overpressure situations).

   (3) Manage low liquid levels and expedite pressurization:

   • When the liquid level in a welding gas cylinder becomes low, the gas space above it expands, resulting in slower pressure buildup during pressurization.
   • To expedite the pressurization process, open the pressure-boosting valve of another cylinder to supply high-pressure gas into the system.
   • Allow the higher-pressure gas to flow back into the cylinder with the lower pressure, equalizing the pressures.
   • Temporarily close the pressure-boosting and gas supply valves on the newly introduced cylinder.
   • The cylinder with the lower liquid level can now resume normal gas supply until the remaining liquid is depleted.

   (4) Transition to a new cylinder:

   • Open the gas supply valve on the newly introduced cylinder to provide gas as intended.

   (5) Cylinder removal and pressure release:

   • After using up the emptied cylinder, close all system connection valves and valves on that cylinder.
   • Remove the empty cylinder.
   • If the pressure is excessively high, carefully push the insulated welding gas cylinder outside the operation area and open the cylinder’s relief valve to release the excess pressure.
   • Close the valve after an appropriate amount of pressure has been released.

   (6) Temporary halt of gas supply system:

   • When the gas supply system needs to be temporarily halted (such as at the end of the workday or during maintenance), follow these steps:
     • Close the pressure-boosting valve on the cylinder.
     • Shut off the usage valve.
     • Instantly open the manifold’s relief valve to release pressure.
     • Once the pressure has slightly reduced, close the valve.

Please note that these operating procedures are designed to ensure the efficient and safe utilization of insulated welding gas cylinders, promoting a smooth workflow and enhanced productivity. Always adhere to these guidelines to guarantee optimum performance and user safety.