The Use Difference between Butterfly Valves and Gate Valves
What is the use difference between the butterfly valve and the gate valve?
According to the role and use of gate valves and butterfly valves, the flow resistance of gate valves is small, and the sealing performance is good. Because the gate valve plate and the medium flow direction is vertical angle, the scour for the medium on the valve plate vibrates the valve plate if the gate valve in the valve plate switch is not in place, which it is easy to show the gate valve seal damage.
The butterfly valve is also called the flip valve. It is a simple structure of the control valve. It can be used for low pressure pipeline media switch control butterfly valve which refers to the closing part (valve disc or butterfly plate) for the disc. It revolves around the valve shaft to achieve the opening and closing of a valve. The valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting.
The butterfly plate is driven by the valve stem, and if it is turned 90 degrees, it can complete an opening and closing. Changing the deflection angle of the plate can control the flow rate of the medium.
Usage conditions and media: The butterfly valve is suitable for producing furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation, environmental protection, building water supply and drainage and other engineering systems to transport a variety of corrosive, non-corrosive fluid media on the pipeline, which is used to regulate and cut off the flow of the medium.
The gate valve is an opening and closing part of the gate. The direction of motion of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed. The discomfort door parameters vary, which is usually 5 degrees. The medium temperature is not as high as 2°52 '. To improve its profitability and make up for the deviation of the sealing surface angle during processing, this kind of ram is called elastic ram.
When the gate valve is closed, the sealing surface can be sealed only by relying on the medium pressure, that is, only relying on the medium pressure to press the sealing surface of the gate plate to the seat on the other side to ensure the sealing of the sealing surface. That is what we call self-sealing. Most gate valves are forced to seal. That is, when the valve is closed, it is necessary to rely on external forces to force the gate to the seat to ensure the tightness of the sealing surface.
Mode of motion: The gate valve's gate plate moves in a straight line with the valve stem. Usually there is a trapezoidal thread on the lifting rod, and through the nut at the top of the valve and the guide groove on the valve body, the rotating motion is changed into a straight motion. That is, the operating torque is changed into the operating thrust. When the valve is opened and the lift height of the gate is equal to 1:1 times the diameter of the valve, the channel of the fluid is completely unblocked. However, this position can not be monitored during operation. In actual use, it is the vertex of the valve stem as a sign, that is, the position of the opening cannot be moved. In order to consider the temperature change, the locking phenomenon is usually opened to the apex position and then reversed 1/2-1 turns, as the position of the fully opened valve. Therefore, the fully open position of the valve is determined by the position of the ram (that is, the stroke). Some stem nuts of gate valves are located on the gate plate, the hand wheel rotation drives the valve stem to rotate, and the gate plate is lifted. This valve is called the rotating rod gate valve or the dark rod gate valve.
According to the role and use of gate valves and butterfly valves, the flow resistance of gate valves is small, and the sealing performance is good. Because the gate valve plate and the medium flow direction is vertical angle, the scour for the medium on the valve plate vibrates the valve plate if the gate valve in the valve plate switch is not in place, which it is easy to show the gate valve seal damage.
The butterfly valve is also called the flip valve. It is a simple structure of the control valve. It can be used for low pressure pipeline media switch control butterfly valve which refers to the closing part (valve disc or butterfly plate) for the disc. It revolves around the valve shaft to achieve the opening and closing of a valve. The valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, metal and radioactive media. It mainly plays the role of cutting and throttling on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting.
The butterfly plate is driven by the valve stem, and if it is turned 90 degrees, it can complete an opening and closing. Changing the deflection angle of the plate can control the flow rate of the medium.
Usage conditions and media: The butterfly valve is suitable for producing furnace, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting and power generation, environmental protection, building water supply and drainage and other engineering systems to transport a variety of corrosive, non-corrosive fluid media on the pipeline, which is used to regulate and cut off the flow of the medium.
The gate valve is an opening and closing part of the gate. The direction of motion of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed. The discomfort door parameters vary, which is usually 5 degrees. The medium temperature is not as high as 2°52 '. To improve its profitability and make up for the deviation of the sealing surface angle during processing, this kind of ram is called elastic ram.
When the gate valve is closed, the sealing surface can be sealed only by relying on the medium pressure, that is, only relying on the medium pressure to press the sealing surface of the gate plate to the seat on the other side to ensure the sealing of the sealing surface. That is what we call self-sealing. Most gate valves are forced to seal. That is, when the valve is closed, it is necessary to rely on external forces to force the gate to the seat to ensure the tightness of the sealing surface.
Mode of motion: The gate valve's gate plate moves in a straight line with the valve stem. Usually there is a trapezoidal thread on the lifting rod, and through the nut at the top of the valve and the guide groove on the valve body, the rotating motion is changed into a straight motion. That is, the operating torque is changed into the operating thrust. When the valve is opened and the lift height of the gate is equal to 1:1 times the diameter of the valve, the channel of the fluid is completely unblocked. However, this position can not be monitored during operation. In actual use, it is the vertex of the valve stem as a sign, that is, the position of the opening cannot be moved. In order to consider the temperature change, the locking phenomenon is usually opened to the apex position and then reversed 1/2-1 turns, as the position of the fully opened valve. Therefore, the fully open position of the valve is determined by the position of the ram (that is, the stroke). Some stem nuts of gate valves are located on the gate plate, the hand wheel rotation drives the valve stem to rotate, and the gate plate is lifted. This valve is called the rotating rod gate valve or the dark rod gate valve.
