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Valve technology has many excellent technical performance
Performance refers to ability. Valve is under internal pressure of mechanical products, so must have sufficient strength and rigidity to ensure the long-term use without fracture or deformation. Has the perfect product structure characteristics, the strength of the valve performance is the ultimate standard strength performance.
Seal performance
Refers to the valve sealing parts to prevent leakage of medium capacity, it is the most important valve of the technical performance indicators. The valve sealing parts in three places: open-close part and the valve seat sealing surface contact between the two places, Packing and stem and packing box match place; Body and bonnet joint of. The top a place called the leak leakage, commonly known as close lax, it will affect the valve truncation medium capacity. To intercept valve class speaking, leakage is not allowed. In two after the leakage is called leakage, namely medium from the internal leakage to the outside. Leakage will cause material damage, environmental pollution, serious when still can cause accidents. For inflammable, explosive, toxic or radioactive medium, leakage is not allowed, so the valve must have a reliable sealing performance.
Common valve technology products, whether shut off valves, or regulator, the sealing surface will not be any erosion, wear is also very small, also is not afraid of wear, superior seal performance can achieve internal and external seal of zero leakage, save energy and protect the environment and improve the work efficiency.
Flow medium
Medium flow through the valve will produce pressure loss (both before and after the valve pressure difference), is also the valve to the flow of the medium have certain resistance, medium in order to overcome the resistance of the valve will consume a certain energy. From energy saving consideration, design and manufacture of the valve, the valve as far as possible to reduce the flow resistance of the medium. Common valve technology products, the flow resistance is very small, less than or equal to the ball valve flow resistance, save a lot of energy and transportation cost, improve the circulation of the medium.
Opening and closing force and moment of opening and closing
Opening and closing force and moment of opening and closing refers to open or close the valve that must be applied force and moment. Close the valve, need to make open-close part hair and seat sealing surface is formed between two certain seal specific pressure, but also overcome the valve stem and packing, between stem and nut thread, between valve rod end bearing place and other friction parts of the friction force, we must put some closing force and moment, close the valve opening and closing process, need opening and closing force and moment of opening and closing is change, the maximum is at the closed end instantaneous or open the initial transient. Design and manufacture of valve should strive to reduce its closing force and closing moment. Common valve technology products, its structure characteristics ensure the opening and closing force and moment of opening and closing is very small, greatly improve the remote control, automation control and emergency control ability.
Opening and closing speed
Opening and closing speed is complete a valve in the open or closed action needed time to say. The general valve opening and closing speed no strict requirement, but some conditions for opening and closing speed with special requirements, such as some requirements quickly open or closed, in order to avoid accident, some requirements slowly close to prevent produce water hammer, etc., in the selection of valve type should be considered. Common valve technology products, the opening and closing speed can according to need to set, in an emergency condition can realize fast opening and closing speed, avoid accidents and improve the processing ability.
Action sensitivity and reliability
This refers to the valve for medium parameters change, make corresponding to the sensitive degree of reaction. For the throttle valve, pressure reducing valve, regulating valve, etc used to adjust the parameters of valve and relief valve, steam trap has particular function for valve, its function sensitivity and reliability is very important technical performance indicators.
Common valve technology products, its action sensitivity and reliability is the existing valve can not match, change the safety valve, pipe vent valve structure form, the small size, even throttle valve, pressure reducing valve, regulating valve, aerospace, nuclear grade with valve by valve, submarine valve and giant valve action sensitivity and reliability are superior.
life
It says, is an important performance index of the valve, and has great economic significance. Usually in can ensure the sealing requirements of opening and closing times said, also can use to use the time to say. Common valve technology products, its service life, both to ensure that the sealing requirements of opening and closing times or use the time to constant, which is very considerable economic significance, and free maintenance or less maintenance.
