Gate valve main standard manual knife gate valve (1) GB12232-89 "universal valve flanged iron gate valve" (2) GB12234-89 "universal valve flange and butt welded steel gate valve" (3) GB8486-87 " (4) GB8465.1-87 "internal thread connection gate valve, globe valve, globe valve, check valve basic size iron gate valve" (5) JB / T53162-94 "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 / TQ648-88 (9) JB / T53200-94 "Iron balance plate valve product quality classification" (10) JB / T53242-94 "Steel plate gate valve product quality classification" 1, the principle of closure Pieces (ram) along the centerline of the vertical movement of the center line to be fully open and all off with off. 2, the choice of gate valve is mainly used to cut off or connect the medium in the pipeline, generally not used as regulation or throttling. 3, classification According to the classification of different types of valve can be divided into: parallel gate valve, wedge gate valve, lift gate valve, rotary lever gate valve, quick opening and closing gate valve, shrink gate valve, flat gate valve. 4, Features Small fluid resistance, suitable pressure, temperature range, medium flow direction is not restricted, good sealing performance. 5, construction, installation points 1), installation location, height, import and export direction must meet the design requirements, the connection should be solid and tight. 2), installed in the insulation pipe on all types of manual valves, the handle shall not be down. 4), hand wheel, handle and transmission mechanism are not allowed to lift, is strictly prohibited collision. 5), with the gate valve drive, according to the instructions of the product installation instructions. 6, the implementation of standards 1), the product standard "general valve flange connection iron gate valve" GB / T "general requirements of steel valves" GB / T "pipeline steel gate valve" JB / T 5298 -91 "Inspection and Testing of Valves" JB / T 9092-1999 "Safety Assessment Criteria for Drinking Water Distribution Equipment and Protective Materials" GB / T 2), Engineering Standard "Water Supply and Drainage and Building Heating Engineering Construction Quality Acceptance Specification "GB" Ventilation and Air Conditioning Engineering Construction Quality Acceptance Code "GB50243-2002
* Plate FLANGE (Plate Flange, Flat Flange, Plain Flange)
* SLIP ON FLANGE (SORF SOFF FLANGE)
* WELDING NECK FLANGE (WNRF FLANGE)
* BLANK FLANGE (BLIND FLANGE, BLFF FLANGE, BLRF FLANGE)
* THREADED FLANGE (SCREWED FLANGE)
*BACKING RING FLANGE
RTJ Flanges,ASME B16.5 Flanges,RTJ Sealing Flanges,RTJ Blind Flanges
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