| 摘要 |
<p>A valve for a fluid cylinder for regulating fluid flow includes a valve body, a packing, a hollow spring retainer element, an excess flow device, a spring, a displaceable first restrictor and a displaceable second restrictor. The valve body having an axial bore having varying cross-section with least cross-sectional dimension at intermediate portion thereof. The packing disposed within valve body and is axially displaceable. The hollow spring retainer element engages with valve body and includes a centrally disposed hole. The excess flow device engages with hollow spring retainer element and has at least one radial and one central hole. The spring received within hollow spring retainer urges displaceable first restrictor towards bore at intermediate portion of valve body to define a close and an open configuration. The displaceable second restrictor disposed within excess flow device facilitates regulation of fluid outflow and inflow by selectively blocking aperture and central hole respectively.</p> |
