| 摘要 |
An improved choke valve apparatus for use in controlling oil well flow for example includes an improved interlock system for warning of a pressurized condition within the valve prior to removal of the valve wing nut member. The safety bleeder plug assembly includes a plug body threadably attached to an opening in the choke body. A pair of spaced apart spring loaded washers interfaces the bleeder plug body and the choke body to several hundred pounds per square inch of pressure so that inadvertent removal of the plug body and body is prevented.
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