Welding globe valve with compact structure, sealing surface is not easy to wear and abrasion; Good sealing performance, manufacture and maintenance is convenient; Open/close the valve stroke is small, opening and closing time is short; Small valve height, good process performance and widely applicable, etc. Welding seven cut-off valve selection of range: 1, high temperature and high pressure medium or device appropriate chooses cut-off valve. Such as power plants, nuclear power stations, petrochemical system of high temperature and high pressure piping. 2, convection resistance is relaxed on the pipeline on the pipeline. Thinking about small place of pressure loss. 3, small valve can choose needle valve, instrument valve, the sampling valve, pressure gauge valve, etc. 4, there is flow control or pressure adjustment, but the adjustment accuracy is not high, and pipe diameter and the relatively small, such as nominal pass after 50 or less ㎜ piping, appropriate chooses. 5, synthetic fertilizer and chemical fertilizer in the industrial production appropriate chooses 16 mpa or PN320 PN160 nominal pressure, nominal pressure, nominal pressure of 32 mpa pressure Angle globe valve or high pressure Angle throttle valves. 6, desilication in bayer process of alumina production workshop, easy to coking on the pipeline, easy to choose seat can be separated type, body place, carbide seal once-through cut-off valve or once-through throttle Industrial Valves. 7 on the water supply, heating, urban construction engineering, nominal menstruation smaller pipe, can be used as, balancing valve or plunger valve, such as nominal drift diameter less than 150 ㎜ piping. Welding cut-off valve nine major characteristics: 1. Globe valve design and manufacturing is in line with API602 and ASME B16. 34. Inspection and testing according to API 598, mark according to MSS - SP- 25. 2. Full size or reducing 3. Rising stem scaffolding 4. Since the centering clamp pressing sleeve type 5. Bolt connection, winding gasket sealed cover, nut connection, all-welded sealed cover and inner pressure self-tightening type screw thread connection valve cover 6. Integral seal seat on 7. The socket end in accordance with ASME B16. 118. Threaded end ( NPT） In line with the ANSI/ASME B1. 20. 19. Disc type can transform for throttling, needles, spherical and check
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The first machine to produce resilient valve, the y gate valve wedge valve was invented in resilient gate valve in os&y gate valve by os & y valve fire protection and was subsequently improved.