| 摘要 |
870,631. Valves. HOBOURN-EATON MANUFACTURING CO. Ltd. Dec. 18, 1958 [Jan. 17, 1958], No. 1673/58. Class 135. A relief valve comprises a valve housing having a valve seating 3 around a relief port in said housing and a counterbore on the outlet side of the relief port within which a closely fitting thin-walled sleeve 9, formed with longitudinal corrugations or flats, guides a spring closed valve member 1 and provides flow passages sufficient to allow unrestricted flow of the relieved fluid.
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