8-word blind plate as the name suggests is shaped like 8 characters, it is blind at one end and the other end is a combination of the throttle ring is made, in the transmission fluid, use the throttle ring, then take advantage of a blind cutting board, a bit like the shut-off valve effect, which can be used to cut off when the valve is leaking. The sealing performance is better. The need for complete isolation of the system, usually chosen as a reliable means of isolation. Before and after the 8-word blind plate should have two shut-off valves, all in the closed state, the exchange 8-word blind state. Common cast and secondary heat exchangers, reactors and secondary cast, nitrogen pipelines and process piping connections and so on. Another feature that identifies clear, easy identification mounted state. The main role played by 8-word blind plate is completely cut off, like 100% reliable than a performance, not the role of being the misuse of the gate valve. General Purpose: 1, the system type media such as steam purge pipeline between the pipeline and oil pipeline process media type sound isolation play, this time, 8-word blind plate should be installed on the side close to the system media pipe. Of course, for 8-word blind plate line removal, the process medium near the pipeline flange side should be cut off valve, so 8-word blind plate is generally marked as normally closed. 2, out of combustible or toxic media devices should be installed double pipe valve, dual valve installed 8-word blind see, this 8-word blind plate is generally marked as normally open. 3, the device will be used when the internal drive is no longer welded flange valve should be installed by media channels to drive normally, 8-word blind plate mounted on the normal five medium flow pipe side, 8-word blind is generally marked as often turn off. 8-word blind selection board and to retain it should be noted that the flange matches the length of the clamping bolt should be appropriately extended in accordance with the blind plate thickness. Installation of 8-word blind effect only one thing: be absolutely cut off. That is the important part. Although there are many places in the valve, but the reliability of the valve is difficult to grasp. Welded flange related knowledge (b) is a welded stainless steel flange pipe means with a neck and a tube transition and the tube butt weld flange, which is widely used at present. Stainless steel welded flange distortion, sealed, welded flange widely used for large fluctuations in pressure or temperature line or temperature, high pressure and low temperature stainless steel pipe flanges, the advantage of cheaper prices, nominal pressure does not exceed 2.5MPa; also used to transport expensive pipeline flammable, explosive medium, nominal pressure in PN16MPa around. Stainless steel welded ring loose flange can be active flange piece, generally supporting the water supply and drainage fittings, expansion joints at both ends of the manufacturers factory will have a flange directly with project pipeline, equipment bolted . Objective play playing loose flange welded ring generally in order to save material, the structure is divided into two portions, one end portion of the tube and pipe connection, one made of welded ring. Flanges low grade material and partially used tubes and pipes of the same material, to achieve the purpose of saving material. Loose flange welded ring: 1 cost savings. When the pipe material particular, when the expensive, flange welding the same material cost is high. 2, is not easy or not easy to weld large processing or strength needed. Such as plastic pipe, glass pipe and the like. 3, ease of construction. When the connector flange bolt holes is not easy to find the corresponding positive or prevent future replacement of equipment flange bolt holes have changed and so on. Flanges | welded flange | Bo Yan Pipe Industry (certified merchants) are provided by Yanshan County Bo Yan Pipe Co., Ltd. Yanshan County Bo Yan Pipe Co., Ltd. (www.czbygy.com) is specialized in the "elbow, tee, size, head, head, flange, hanger, manhole, compensation, take over the seat" of the enterprise the company of "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Wenjiang.