Valve leakage rating and operating environment
Thread Content
For the pneumatic quick shut-off valves used in gas pipelines, the design specifies that the leakage level of the valve seat should be at the microbubble level (Level VI); however, when purchasing them, the manufacturer specified that the leakage level of the valve disc should be at Level 6. Dear experts, is it the same thing? This valve is used in the natural gas pipeline of heating furnaces. It features a fast opening time (1–2 seconds) and frequent operation (opened once per minute). The calorific value of natural gas is Qd=8300×4.18 kJ/m3; in the event of a severe leak, it can affect the proper functioning of the furnace’s combustion system (air-regulated regenerative combustion system). I would like to hear from the experts’ insights on valve sealing and service life
It should be the same; both are ANSI Class VI, as specified in standard ASME B16.104
When using valves, it is best to use two valves together to prevent control issues in the event that one valve gets damaged! Do not use too much force when operating; follow the operating procedures!
It’s the same thing! It’s a pity; you should take a look at the relevant specifications
It’s the same thing: for ANSI B16.104 VI, depending on the diameter, pressure, operating temperature, and medium in use, a triple-eccentric metal hard-sealed butterfly valve is recommended, as it can meet the VI requirements.