作者: Philip W. Eggleston , Douglas J. Boyd
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摘要: A fluid control valve for controlling flow includes a housing having an inlet port (28), and outlet (32), passage (40) in the interconnecting permitting communication between port. The is substantially smoothly contoured along length of interior thereof so that when flows through passage, will not increase turbulence passage. further removable seat (46) inner aperture matching contour thereby minimizing element (50) moveable first position wherein permitted second elemnt sealing engages blocking removably mounted