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    • 4. 发明授权
    • Heated removable throttle valve
    • 加热可拆卸节流阀
    • US5462080A
    • 1995-10-31
    • US114893
    • 1993-08-31
    • Richard W. PlavidalPetru N. NitescuGreg MudwilderRichard Crockett
    • Richard W. PlavidalPetru N. NitescuGreg MudwilderRichard Crockett
    • F16K1/22F16K27/02F16K47/08F16K49/00F16K51/02
    • F16K27/0218F16K47/08F16K49/002Y10T137/6048Y10T137/6497Y10T137/6606Y10T137/8122
    • A two piece throttling valve is disclosed. The valve assembly includes a stationary outer housing with an inner removable operable assembly. In this configuration the piping (pump stack) does not have to disassembled to remove, clean or replace the internal valve pieces or the in-line screen. The inner assembly can be quickly removed for cleaning. The entire valve assembly is heated to reduce deposition of volatile process byproducts on the internal valve surfaces and reduce the cleaning frequency. A wedge plate is provided in the outer stationary valve housing to mate with a sloped bottom surface of the inner valve housing such that when the inner assembly is in position in the outer valve housing there is a tight fit between adjacent sealing surfaces around the valve bore. A single flat surface seal provides vacuum sealing between the inner assembly and outer housing. A dual valve stem (shaft) seal seals the valve shaft. The seal includes an inner O-ring made of a chemically resistant material and an outer O-ring that is less chemically resistant, but has a dual-quad profile to prevent vacuum leakage. A screen in the fluid passage adjacent to and supported by the outer housing can easily be accessed from the inside of the outer housing.
    • 公开了一种两件式节流阀。 阀组件包括具有内部可拆卸可操作组件的固定外壳。 在这种配置中,管道(泵组)不需要拆卸,以拆卸,清洁或更换内部阀片或直列式屏幕。 内部组件可以快速拆卸清洁。 加热整个阀门组件以减少内部阀门表面上挥发性过程副产物的沉积并降低清洗频率。 在外部固定阀壳体中设置楔形板,以与内部阀壳体的倾斜的底部表面配合,使得当内部组件在外部阀壳体中的适当位置时,在阀孔周围的相邻密封表面之间紧密配合 。 单个平面密封件在内部组件和外部壳体之间提供真空密封。 双阀杆(轴)密封件密封阀轴。 密封件包括由耐化学腐蚀材料制成的内O形环和外部O形环,其耐化学性较差,但具有双重四边形以防止真空泄漏。 靠近外壳的流体通道中的屏幕可以容易地从外壳的内部进入。