Electric butterfly valve, standard, size, type

Electric butterfly valve, standard, size, type (ID: Butterfly valve), please contact Electric Butterfly Company: British Connaught Shanghai Valve Factory View this member Postings View this member's products all electric butterfly valve valve selected Shanghai sword The main performance specifications apply to a temperature suitable for medium NR ≤85 ℃ gypsum slurry, limestone slurry, recycle water, process water, waste water EPDM ≤100 ℃ Main Parts Material Name Material Body gray cast iron, ductile iron, carbon steel disc rubber coated steel, carbon steel coated with fluorine plastic, stainless steel duplex stainless steel 1.4529, C276 seat natural rubber, EPDM rubber Stem stainless steel, 2Cr13,304 main dimensions and connection dimensions (mm) nominal diameter (DN) Nominal pressure (PN) MPa LD D1 Z-Ф H H1 AB D0 Weight (kg) 50 1.0 108 165 125 4-18 310 227 193 125 150 8 65 112 185 145 4-18 333 240 193 125 150 11.5 80 1142001608-18 423,323,193,125,150 12.5 100 127 220 180 8-18440330193 125 15023125140250 2108-18455330 19312515041150 1402852408-22 510,368,193,125,150 47200152340295 8-22614444283 165 22061250165395 35012-22680483 28316522074300 17844540012-22 776,554,334,175,280 103,350,190,505,460 16-22840588334 175 280 120 400 216 565 515 16-26 858 596 425 21O 320 217 450 222 615 565 20-26 993 686 425 210 320 242 500 229 670 620 20-26 1056 721 425 21O 320 279 600 267 780 725 20-30 1161 771 425,210,320,396,700 0.6 22986081024-26 1,350,818,503,393,450,265 700 1.0 29289584024-30 1,350,818,503,393,450,424 800 0.6 24197592024-30 1,440,858,503,393,450,345 800 1.0 318 101595024-33 1,440,858,503,393,450,552 900 0.6 24,110,751,020 24-301616978 630,555,500,425,900 1.0 330 1115 105028-331616 9,786,305,555,006,801,000 0.6 300 1175112028-30 17801058630 5555005651000 1.0 41,012,301,160 28-3617801058 6,305,555,009,061,100 0.6 35,013,051,240 28-3319951200 6,305,555,007,401,100 1.0 44,013,401,270 32-3619951200 6,305,555,001,184 35,014,051,340 1200 0.6 32-3320451250 6,305,555,009,101,200 1.0 47,014,551,380 32-3620451250 6305555001456 standard design manufacture: GBl2238 Structure length: GB12221 Flange: GB / T17241.6PN 1.0MPa PN0.6MPa Butterfly (English: butterfly valve) is closed parts (valve or disc) to the disc around the valve axis to achieve the opening and closing a valve in the main pipeline from the off and throttling. Valve opening and closing member is a disc-shaped butterfly plate in the valve body around its own axis, so as to achieve the purpose of opening and closing or adjusting. Valve fully open to fully closed is usually less than 90 °, butterfly and butterfly stroke itself is not self-locking capability, in order to position the disc to install the worm gear on the stem. Using worm reducer, not only can make the disc with self-locking capability, so the disc stop in any position, but also to improve the valve performance. Industry-specific characteristics of butterfly valves to high temperature, higher pressure range, the valve nominal diameter large, carbon steel valve body, the valve plate seal with a metal ring in place of the rubber ring. Large temperature valve with welded steel manufacturing, mainly for smoke duct and gas pipelines high temperature media. 1930s, the United States invented the butterfly valve, the 1950s introduced to Japan, the 1960s was widely used in Japan, while in China it is a matter of promotion after the 1970s. The world in general DN300 mm butterfly valve has gradually replaced the valve. Valve and valve opening and closing time is short compared to the operating torque, small installation space and light weight. To DN1000, for example, butterfly about 2T, while the gate of about 3.5T, and the valve is easy with a variety of drive combinations, with good durability and reliability. When the rubber seal butterfly valves for throttling drawback is that, due to improper use will produce cavitation, the rubber seat spalling, damage from happening. To this end, the international community has now developed metal sealing butterfly valve, cavitation area decreases, in recent years, China has also developed a metal sealing butterfly valve, in Japan in recent years has also developed resistance to cavitation, low vibration, low noise comb butterfly. General sealing seat of life under normal circumstances, the rubber 15 Year - 20 years, 80 years of metal - 90 years. But how correct choice they should according to working conditions. Butterfly valve opening and the relationship between the flow essentially linearly proportional to the change. If used to control the flow, the flow resistance of the flow characteristics and piping is also closely related, such as the installation of two pipelines valve size, form, etc. identical, and the pipe loss coefficient is different, the difference between the flow valves will be great. If a significant reduction in the state of the throttle valve, the valve plate on the back prone to cavitation, there is the possibility of damage to the valve, generally used in the 15 ° outside. When the valve is in the opening, the opening shape of the front end of the body and disc formed with the valve shaft as the center, formed on both sides to complete the different states, the disc along the flow direction of the front side of the move, the other side of the water countercurrent direction move, therefore, the side of the valve body and the valve plate is formed like a nozzle-shaped openings, similar to the other side of the orifice-shaped openings, fast nozzle orifice side than the side of the flow rate, and the throttle valve will produce the following negative side, often there will be rubber seals off. Valve operating torque, due to open and close the valve opening and its value varies in different directions, horizontal butterfly valve, especially the large-diameter valve, due to the water depth, valve shaft, the torque generated by the water head difference can not be ignored. Further, when the inlet side of the valve means bend to form a bias current, torque will be increased. When the valve opening in the middle, because the water flow torque acts, the operating mechanism requires self-locking 1. According to the structure in the form of classification (1) Center sealing butterfly valve (2) a single eccentric seal butterfly valve (3) double eccentric sealing butterfly valve (4) three eccentric sealing butterfly valve 2. According to the sealing surface material classification (1) soft sealing butterfly valve. 1) Sealing of non-metallic soft materials soft non-metallic materials. 2) Sealing material made of non-metallic rigid metal soft material. (2) metal seal butterfly valve. Sealing a metallic hard material metal hard material. 3. Press the seal in the form of classification (1) forces sealed butterfly valve 1) elastic sealing butterfly valve. Sealing pressure when the valve is closed by the valve plate squeeze the elastic valve seat or valve plate production. 2) applied torque sealing butterfly valve. Sealing pressure generated by the applied torque to the valve shaft. (2) pressurized sealing butterfly valve. Sealing pressure seal made of an elastic member seat or valve plate filling pressure generating element. (3) self-sealing valve. Sealing pressure generated automatically by the media pressure. 4. According to the working pressure classification (1) vacuum valve. Working pressure is lower than standard atmospheric heap butterfly calendar. (2) low-pressure valve. Nominal pressure PN <1.6MPa butterfly. (3) pressure valve. , PN is 2.5--6.4MPa butterfly. (4) High-pressure valve. , PN is 10.0--80.0MPa butterfly. (5) high pressure valve. Nominal pressure PN> 100MPa butterfly. 5. According to the working temperature classification (1) high temperature butterfly: t> 450 C butterfly (2) Temperature butterfly: 120 C