There are many types and models of large-diameter valves, what are their characteristics? How is it produced and applied? Below, the large diameter valve company introduces large diameter valves such as ball valves, butterfly valves, gate valves, globe valves, and check valves.
The load borne by the large-diameter valve valve is transmitted to the valve through the ear handles on both sides of the valve, and the load on the valve is then transmitted to the embedded foundation through the ball valve body. Therefore, the constraint borne by the valve is the constraint that the valve reacts on the ear handle of the valve, and the ear handle can rotate. Therefore, the constraint of the ear handle at this point is rolling bearing contact.
Advantages (characteristics) of large diameter valves
1. Low flow resistance. The medium channel inside the valve body is straight, and the medium flows in a straight line with low flow resistance.
2. It saves effort when opening and closing. Compared to globe valves, the movement direction of the gate is perpendicular to the flow direction of the medium, whether it is open or closed.
3. Water hammer phenomenon is not easy to occur. The reason is that the shutdown time is long.
4. The structural length (the distance between the two connecting end faces of the shell) is relatively small.
5. The sealing surface is prone to wear and tear, which affects its service life.When opening and closing, the two sealing surfaces of the gate and valve seat rub and slide against each other, which can easily cause scratches and wear under the pressure of the medium, affecting the sealing performance and shortening the service life.
6. The price is relatively expensive. There are many contact sealing surfaces and the processing is complex, especially the sealing surface on the gate seat is not easy to process, and there are many parts.
7. Simple form, short structural length, good manufacturing process, and wide application range.
8. Compact structure, good valve rigidity, smooth channel, small flow resistance, sealing surface made of stainless steel and hard alloy, long service life, PTFE packing, reliable sealing, easy and flexible operation
The large-diameter butterfly valves, ball valves, gate valves, check valves, globe valves, pressure reducing valves, exhaust valves and other products produced by the large-diameter valve company are widely used in various industries such as thermal power plants, hydropower stations, nuclear power plants, urban water supply and drainage, sewage treatment, etc. at home and abroad.
Working principle and operation of large diameter valves
The working principle and operation of large-diameter valves. The direct acting solenoid valve is a balanced direct acting structure. The large-diameter valve utilizes the principle of automatic pressure balance and electromagnetic valve force to jointly act on the valve core. The moving iron core and valve core are integrated structures. When the coil is energized, the moving iron core is directly driven upwards by electromagnetic force to connect with the fixed iron core. The valve port instantly opens and the medium passes through. When the coil loses power, the magnetic force disappears, and the moving valve core lands and closes the valve port under the action of spring force, resulting in a cutoff of the medium. Especially suitable for use in places where the medium needs to be emptied or where high and low pressures coexist.
The structural principle of butterfly valves is particularly suitable for making large-diameter valves. Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems of thermal power plants. There are two commonly used butterfly valves: wafer butterfly valve and flange butterfly valve. A wafer type butterfly valve is a valve that is connected between two pipeline flanges using double headed bolts. A flange type butterfly valve is a valve with a flange, and the flanges at both ends of the valve are connected to the pipeline flange using bolts. Used for gas pipelines in the sulfuric acid industry: furnace front blower inlet and outlet, relay blower inlet and outlet, electric mist removal series and connecting valves, S02 main blower inlet and outlet, converter adjustment, preheater inlet and outlet adjustment, and cut-off gas usage.
Summary: Large diameter valve companies believe that good design lays the foundation for high-quality products, and the production line of casting, welding, mechanical processing, assembly, inspection and testing is the fundamental way to ensure quality.
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