English to French Tech/Engineering Patents (in a patent) CLEARANCE CONTROL SYSTEM FOR A COMPRESSOR SHROUD ASSEMBLY

The modulating valve 251 may open or throttle open to supply actuating air to the piston chamber 130. The modulating valve may shut to stop the flow of actuating air and maintain existing fluid pressure of the piston chamber 130. The modulating valve may open or throttle open to allow discharge or bleed of actuating air from the air piston 116. For example, the modulating valve 251 may be a three-way valve that allows actuating air to flow into the piston chamber 130 from the actuating air supply chamber 255 and allows actuating air to flow out of the piston chamber 130 to a separate bleed path 259. Modulating valve 251 may also allow two-way flow between the actuating air supply chamber 255 and piston chamber 130 driven by differential pressure.