How to use the pneumatic hydraulic control butterfly valve linked with the cooling tower? The opening and closing part of pneumatic butterfly valve is a sphere with a circular channel, which rotates around the axis perpendicular to the channel, and the sphere rotates with the valve stem to open and close the channel. The pneumatic butterfly valve can be closed tightly with only 90 degree rotation and very small rotating torque. According to the needs of working conditions, different driving devices can be assembled to form a variety of pneumatic butterfly valves with different control methods, such as electro pneumatic butterfly valve, electro pneumatic butterfly valve, hydraulic pneumatic butterfly valve, etc. Working principle of pneumatic butterfly valve: the working principle of pneumatic butterfly valve is to rotate the valve core to make the valve unblocked or blocked. The pneumatic butterfly valve is light to open and close, small in size, can be made into a large caliber, reliable in sealing, simple in structure, convenient in maintenance, and the sealing surface and spherical surface are often closed, not easy to be eroded by media, so it is widely used in various industries. The working principle of the pneumatic butterfly valve is as follows: when the pneumatic butterfly valve rotates 90 degrees, it should be spherical at the inlet and outlet, so as to close the valve and cut off the flow of media. When the pneumatic butterfly valve rotates 90 degrees, the inlet and outlet should be all ball ports, so as to open the flow, and there is basically no flow resistance. When pneumatic butterfly valve 1 is in the closed position during the opening process, the ball is pressed on the valve seat by the mechanical pressure of the valve stem. 2. When the hand wheel is turned counterclockwise, the valve rod moves in the opposite direction, and the angular plane at the bottom makes the ball detach from the valve seat. 3 The valve rod continues to lift and interacts with the guide pin in the spiral groove of the valve rod to make the ball begin to rotate without friction. 4 Until it reaches the fully open position, the valve rod is lifted to the limit position, and the ball rotates to the fully open position. When the pneumatic butterfly valve is closed during the closing process 1, rotate the hand wheel clockwise, the valve stem starts to drop and the ball starts to rotate away from the valve seat. 2 Continue to rotate the handwheel, and the valve rod is acted by the guide pin embedded in the spiral groove on it, so that the valve rod and the ball can rotate 90 at the same time. 3 When the valve was about to close, the ball had rotated 90 ° without contacting the valve seat. 4. For the last few turns of the hand wheel, the structural principle of the angular plane mechanical pneumatic butterfly valve at the bottom of the valve stem: 1. The pneumatic butterfly valve is not limited by the installation direction, and the flow direction of the medium can be arbitrary. The fluid resistance is small, and the pneumatic butterfly valve with full bore basically has no flow resistance. 2. The pneumatic butterfly valve is simple in structure, relatively small in size, light in weight and easy to maintain. 3. Tight and reliable. It has two sealing surfaces. At present, various plastics are widely used as the sealing surface materials of pneumatic butterfly valves, which have good sealing performance and can realize complete sealing. It has also been widely used in vacuum systems. 4. Pneumatic butterfly valve is suitable for frequent operation, with quick and convenient opening and closing. It is easy to operate and can be opened and closed quickly. It only needs to rotate 90 ° from full opening to full closing, which is convenient for remote control. 5. It is easy to maintain, the pneumatic butterfly valve is simple in structure, the sealing ring is generally movable, and it is easy to remove and replace. 6. The pneumatic butterfly valve has good sealing performance. When the valve is fully opened or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the valve sealing surface. 7. It has a wide range of applications, ranging from a few millimeters to several meters in diameter, from high vacuum to high pressure. 8. Pneumatic butterfly valve can be used in media with suspended solid particles due to its wiping property during opening and closing. 9. Pneumatic butterfly valve has small fluid resistance, no vibration and low noise. Pneumatic butterfly valves: pneumatic butterfly valves include: floating ball pneumatic butterfly valve, fixed ball pneumatic butterfly valve, rail pneumatic butterfly valve, V-shaped pneumatic butterfly valve, three air butterfly valve, stainless steel pneumatic butterfly valve, cast steel pneumatic butterfly valve, forged steel pneumatic butterfly valve, ash unloading pneumatic butterfly valve, sulfur resistant pneumatic butterfly valve, electric pneumatic butterfly valve, electric pneumatic butterfly valve, ferrule pneumatic butterfly valve, welding pneumatic butterfly valve. Pneumatic butterfly valve transmission classification 1. Electro pneumatic butterfly valve 2. Electro pneumatic butterfly valve 3. Hydraulic pneumatic butterfly valve 4. Pneumatic pneumatic pneumatic butterfly valve 5. Electro hydraulic pneumatic butterfly valve 6. Turbine driven pneumatic butterfly valve pneumatic butterfly valve model preparation method: With the acceleration of the development of industrial machinery manufacturing industry, the application of valve products has also developed from low pressure and normal temperature to high pressure and high temperature with social and industrial progress, The use of pneumatic butterfly valves is also increasing year by year. The models of pneumatic butterfly valves used in different media requirements and different working conditions are also different. The editing method of pneumatic butterfly valve models provided by Watto Valve here is mainly from the increase of additional conditions of pneumatic butterfly valves, the selection of driving methods, the difference of connection forms, the change of structural forms, the types of sealing materials It is convenient to explain the pressure of the valve and the valve body material, which is convenient for the user to select the type of Woto pneumatic butterfly valve and correct for the purchase of pneumatic butterfly valve. Indication method for model preparation of pneumatic butterfly valve: additional code of pneumatic butterfly valve: V indicates that the valve core has V-shaped structure, D indicates low temperature, B indicates insulation, P indicates eccentric structure, U, S and DY indicate top mounted type; Name code of pneumatic butterfly valve: Q refers to pneumatic butterfly valve; Pneumatic butterfly valve drive code: 2 indicates electro-hydraulic, 3 indicates turbine, 6 indicates electric, 7 indicates hydraulic, 9 indicates electric and manual without code; Connection code: 1 indicates internal thread, 4 indicates flange type, 6 indicates welding, 7 indicates wafer type; Structure type code: floating type: 1 represents straight flow passage, 2 represents Y-shaped tee, 4 represents L-shaped tee, 5 represents T-shaped tee; Fixed type: 0 means hemispherical straight through, 6 means four-way flow channel, 7 means straight through flow to, 8 means L-shaped tee, 9 means Y-shaped tee; Seal material code: B babbitt, F fluororubber, F46 fluorine lining, H stainless steel, J rubber lining, M Monel alloy, N nylon plastic, Monel P, Y hard alloy, W valve body directly processed; Pressure rating code: 16 means the pressure is 16kg (1.6Mpa), and the maximum pressure can reach 64Mpa; 150LB refers to American standard pound pressure, and the maximum withstand voltage level can reach 2500LB (150LB=1.6MPA/300LB=2.5-4.0mpa/400LB=6.4mpa/600LB=10mpa); 5K represents the daily pressure, and the maximum pressure is 63K; Valve body material code: A titanium and titanium alloy, C carbon steel, I chromium molybdenum steel, P18-8 stainless steel, RMo2Ti stainless steel, S plastic. Example for editing model of pneumatic butterfly valve: Q641F46-16C electric fluorine lined pneumatic butterfly valve ①, Q: pneumatic butterfly valve; ② 6: Indicates that the transmission mode is electric; ③ 4: The connection mode is flange connection; ④ 1: The structure is a floating straight passage; ⑤ F46: The sealing auxiliary material is fluororubber; ⑥ 16: It indicates that the nominal pressure is 1.6MPa; ⑦ C: It indicates that the valve body material is carbon steel.
、 And the use of pneumatic butterfly valve can also be used in high temperature environment. It is also widely used. For example, in metallurgical industry, chemical industry and glass industry. It can be used as a high temperature medium flow component. The above is the relevant introduction of the two styles of products, hoping to bring some help to everyone.
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