When we choose a bellows globe valve
, we should follow the following steps as a reference to purchase: 1. Determine the nominal diameter and connection method of the pipe connected to the bellows globe valve: flange, thread, welding, etc. 2. Clarify the use of the bellows globe valve in equipment or devices, and determine the working conditions of the bellows globe valve: applicable medium, working pressure, working temperature, etc. 3. Determine the way to operate the bellows globe valve: manual, electric, electromagnetic, pneumatic or hydraulic, electrical linkage or electro-hydraulic linkage, etc. 4. Determine the geometric parameters of the selected bellows globe valve: structural length, flange connection form and size, the size of the valve height direction after opening and closing, the size and number of bolt holes connected, the overall valve size, etc. 5. Use existing materials: bellows globe valve product catalog, valve product samples, etc. to select appropriate valve products. 6. Determine the material of the shell and internal parts of the selected bellows globe valve according to the medium conveyed by the pipeline, working pressure and working temperature: gray cast iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless acid-resistant steel, copper alloy, etc. 7. Select the type of bellows globe valve 8. Determine the type of bellows globe valve 9. Determine the parameters of the bellows globe valve: For automatic bellows globe valve, determine the allowable flow resistance, discharge capacity, back pressure, etc. according to different needs , and then determine the nominal diameter of the pipe and the diameter of the valve seat hole.
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