Air source configuration for gas-liquid control valve
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Gas pipeline systems are equipped with gas-liquid actuated emergency shut-off valves. It is planned to use on-site nitrogen cylinders; these cylinders have a pressure of 12 MPa, and their 40 L capacity allows them to supply 4.5 Nm3 of gas, so this should be sufficient. The required pressure for the gas supply to such valves is 4–6 MPa. How should the pressure reducing valve used to supply gas to these valves be selected?
Ask if the calculations for the design are reasonable
This design is absolutely hilarious. 1. Are you sure the pneumatic valve operates at 4-6 MPa and not 4-6 bar? 2. How is the air supply from the gas cylinder ensured? Does the valve only consume air when it’s in operation? 3. Why didn’t the person who came up with this suggestion recommend using a commercial compressor instead? I think that would be better than using a gas cylinder. 4. Finally, if there really is no air source available, it’s advisable to replace the actuator of the shut-off valve with an electric one