Cut-off valve opening and closing parts of the cylindrical valve, leaving it flat or cone seal, fluid along the centerline of the valve in a straight line. GB Valve is only suitable for fully open and fully closed, generally do not have to regulate the flow, allows for adjustment and the throttle when customized. Nominal pressure 1.6MPa-16.0MPa, work temperature petroleum, chemical, pharmaceutical, fertilizer, power industry -29 ~ 550 ℃ the other conditions of the pipeline, cut off or connected piping media. Driving a manual mode, gear, electric, pneumatic. [A] product characteristics: (1) simple structure, manufacture and maintenance more convenient (2) small working stroke, closing time is short (3) sealing, the sealing surface friction force is small, longer life expectancy [two] Executive Standard : (1) design specifications: GB / T 12235 (2) Structure length: GB / T 12221 (3) flange connection: JB / T 79 (4) test and inspection: JB / T 9002 (5) Product Identification: GB / T 12220 (6) Delivery specification: Please fill when JB / T 7928 product structure ordering "specifications" or indicate the following: a, if not yet selected model before ordering, please provide your use parameter 1 to us front (off electric - - disclosure or electric) 4, 5 flow characteristics, valves, nominal diameter, rated flow coefficient KV 2, fluid properties (including nominal pressure, temperature, viscosity or pH) 3, a valve action form , back pressure valve 6, valve, valve material 7, 8 input signals, with attachments, annex models, so that we can correct for your selection. Second, the special requirements of a special test 2 completely to oil, to water treatment 3. Copper and PTFE 4, under a special interface, the pipe 5, the vacuum conditions of use 6, specify the color of the coating 7, special media (oxygen, nitrogen, chlorine , hydrogen, etc.) 8, the use of stainless steel fittings and the like. Third, if the company has been selected by the design of the product model, please purchase directly to our sales department by the models.