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Foreign choice of butterfly valve factors considered
Operating Life Operating butterfly valves are used more than 10,000 times and are still "breathable" when closed. Butterfly valves can operate for more than 10,000 cycles and still provide "bubble tight" shut off. Pressure Drop Pressure Drop Increases energy consumption if the pressure drop is too large. However, it should be noted that the valve is not the only cause of pressure drop in the piping system, resulting in the pressure drop as well as the following factors. Pipeline fluid cross section. Pipe wall friction. Flow through the parts change. The butterfly valve's fluid properties are equivalent to three times or more the stop valve, which is equivalent to 75% of the same size gate valve. Point to keep in mind? The valve or valves are but one factor in a piping system that contribute to pressure drop. Of equal concern are these factors: Flow area of ​​piping. Flow barriers of piping. equivalent size gate valve. Versatility Butterfly Valves Control and regulate piping systems by turning on / off and throttling / balancing. Butterfly valves have better "versatility" than gate valves or globe valves. Because the butterfly valve can use a variety of surface treatment technology and the choice of flexible material pipe, so the butterfly valve has a very strong chemical corrosion resistance. Butterfly valves can be used for on / off service and throttling / balancing. They are superior in "versatility" as compared to a gate or globe valve. Butterfly valves have a wider range of chemical resistance due to the trim options and choice of elastomeric liners Weight The lightweight butterfly valve costs less to install than a heavy-duty cast iron valve: for example, a butterfly valve with a nominal 10-inch diameter weighs 55 pounds and a 10-inch cast iron gate valve weighs 490 pounds. For the entire pipeline system, the use of butterfly valve saves installation costs is very impressive. In addition, the heavier the piping system, the stronger the piping support base is and therefore the more expensive the entire piping system. Therefore, taking into account the weight of the valve, you can save the cost of the entire pipeline system. This can be an important savings when it is calculated over an entire system. The heavier the system, the stronger the pipe hangers, and the more expensive they become. The size of the Physical Size butterfly valve takes up about the same size as the gate valve's 1/6. For every additional cubic foot of building space, this means a waste of costs. For example, a butterfly valve with a nominal 10-inch diameter is about 21 inches high and a gate valve with a nominal 10-inch diameter is as high as 43 inches. Butterfly valves take up approximately 1/6 the space of a gate valve. Every cubic foot of a building costs money. IE: 10 "butterfly is about 21" high 10 "iron gate is about 43" The valve seat of the -Off gate valve and stop valve (metal-to-metal connection) does not have airtightly closed performance. Ease of Operation Butterfly valves require only 1/4 turn (90 °) of rotation from opening to closing. The gate valve and globe valve need to turn a lot of turn to the valve from the open state into a closed state. Easy to open or close means that you do not need to hire a paid operator to operate a butterfly valve. Gates and globes require multiple turns to open and close. The cost of a butterfly valve is usually only cast iron gate valve Of the 40%, not only the purchase of low cost, but also lower installation costs. Maintenance Since the butterfly valve has a high six factor and a good elastic seat, the butterfly valve has an automatic Cleaning function, reducing the possibility of plugs clogged with plugs. Properly installed butterfly valves are virtually self cleaning and are less susceptible to failure due to trash material in the line.