Gate valve main standard (1) GB / T General valve Flanged iron gate valve (2) GB / T Oil and gas industry with steel stud valve cover valve gate (3) GB8486-87 " (4) GB8465.1-87 "internal thread connection gate valve, globe valve, ball valve, check valve basic size iron gate valve" (5) JB / T53162-1999 "Gate valve product quality grading" (6) JB / T5298-91 "pipeline steel plate gate valve" (7) JB / Z243-85 "gate valve static pressure life test procedures" (8) JB / TQ648-8 (9) JB / T53200-94 "Equivalent iron flat plate gate valve product quality rating" (10) JB / T53242-94 "steel plate gate valve product quality classification" 1, the valve work Principle Closure (gate) along the centerline of the vertical movement of the center line to do full and cut off all use. 2, the gate valve is mainly used to cut off or connect the media in the pipeline, generally not as a regulation or throttling use. 3, gate valve classification According to different classification methods can be divided into: parallel gate valve, wedge gate valve, lifting gate valve, rotary gate valve, quick opening and closing gate valve, shrink gate valve, flat gate valve. 4, the valve features fluid resistance is small, suitable pressure, temperature range, medium flow direction is not restricted, good sealing performance.
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