Pilot valve for chamber pressurisation or depressurisation control - uses frictional membrane damping for reduced instability losses

摘要

The pilot valve or press control valve is for a press control chamber of a press, regulator controlling the output press of a pipe and is designed to enable the pressurisation or depressurisation of a casing or chamber with minimal losses due to instability in the valve. The controlled chamber is pressurised or depressurised according to the press. of the pilot valve. The press. monitoring volume of the valve is bounded on one side by a sealed membrane responsive to the press. The membrane consists of at least two flexible membrane layers which slide w.r.t. each other with frictional resistance which damps out instabilities.