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Hard to touch two-way ball valve overview The world's most sophisticated, most cost-effective ball valve pipe network system, most of the valves, mainly used to cut off the media and regulation, this part of the valve in the system accounted for a large proportion of the amount required to require the valve Durable and cost-effective at the same time should be able to adjust and interrupt the media when the forward flow, in the pressure changes or overhaul medium can prevent media back, that is, with two-way cut off function. Recently, this part of the valve in the pipe network system, the main application of the globe valve, gate valve, butterfly valve and ball valve. Stop valve and gate valve, has a good two-way cut-off function, sealing performance and service life are good, are one of the ancestors of the valve, but the cut-off valve by the cut-off structure of the inherent limitations of the large operating torque, unable to produce large diameter, Currently on the market only to the largest DN400; gate valve is no regulatory function to regulate the flow of the gate there is a significant danger of falling off, and large gate valve with its huge shape and height, in the manufacturing and transportation difficulties. Butterfly valve compared with the gate opening and closing time is short, the operating torque is small, small installation space and light weight and other characteristics, the partial division of the valve instead of using butterfly valve. But always, the sealing performance of the butterfly valve has not fully met the market requirements. In addition to the midline rubberized butterfly valve can be sealed in both directions within a certain pressure range, the other structure is basically a one-way flow. The midline structure can not be popularized by rubber restrictions. After the improvement, a two-way butterfly valve with a stainless steel elastic plate structure appears on the market, but its price is high. Mainly used in petroleum, natural gas, gas and other media is more important pipeline, pipe network in general, especially the water system applications rarely.
W11 Series Metal Plate Rolling Machine
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