Installation location of the control valve?

(1) The installation location of the control valve shall meet the requirements of the process flow design, and it shall be located near the primary indicating instruments related to it, so that these instruments can be observed easily when manually operating the bypass valve； (2) The control valve should be installed on the ground or a platform in a location that facilitates operation and maintenance ； (3) The control valve should be installed vertically and upright in a horizontal pipeline; in special cases, it may be installed horizontally or at an angle, but support must be provided ； (4) When installing the control valve assembly (including control valves, bypass valves, shut-off valves, and drain valves) in elevation, the control valve should be installed below the bypass. Control valves with a nominal diameter of less than 25 mm can also be installed above the bypass ； (5) The clear height from the bottom of the control valve to the ground or platform surface should not be less than 400 mm. For single- and double-seat control valves with reverse-mounted spools, it is advisable to leave space below the valve body for removing the spool ； (6) There should be a clearance of not less than 2 mm above the top of the control valve diaphragm head. When the control valve and the bypass valve are arranged one above the other, their positions should be spaced apart ； (7) Gate valves should be used for shut-off valves, while globe valves should be used for bypass valves; however, when the nominal diameter of the bypass valve is greater than 150 mm, a gate valve can also be used. The two shut-off valves and the control valve should not be arranged in a straight line ； (8) A drain valve should be installed at the lowest point in the pipeline between the inlet side of the control valve and the shut-off valve upstream of it; a gate valve can be used as this drain valve ； (9) On pipelines containing solid particles in the medium, the control valve and the bypass valve should be arranged on the same plane, or the bypass valve should be placed below the control valve ； (10) Among the two supports of the control valve assembly on low-temperature and high-temperature pipelines, one should be a fixed support and the other a sliding support ； (11) The control valve should be installed in an environment where the temperature is not higher than 60 °C and not lower than -40 °C, and away from sources of vibration ； (12) When there are multiple control valve assemblies in one area, it is necessary to consider ensuring consistency in design, as well as neatness, aesthetics, and ease of operation ； (13) When the diameters of the control valve and the isolation valve differ, the reducing tee should be installed near the control chamber ； (14) Pay attention to whether there are any special requirements from the process for the position of the control valve.