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valve trim (The removable and replaceable internal parts of the valve that come in contact with the flow medium are collectively known as valve trim. Disc, valve seat, and stem are common for all the valves. Valve Trim components will change with types of valves. Valve specific trim includes a back seat, glands, spacers, guides, bushings, retaining pins, and internal springs. ... см.  hardhatengineer.com Mixer) | |||