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The main technical properties of copper valves

Update Time :2016-10-18The view :626

Strength properties

Strength properties of copper valve is the brass valves withstand the media pressure capability. Copper valve is a pressure of mechanical products, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation.

Sealing performance

Copper sealing performance of the valve is brass valves part of the sealing ability to prevent media leaks, it is the most important copper valves technical performance indicators. Copper valve seal has three parts: opening and closing pieces and valve seat sealing surface contacts between the two; the filler stem and the stuffing of the distribution and office; the connection of body and bonnet. Which is called before a leak within the leak, which is commonly known as Guan lax, it will affect the ability of copper valve cut off media. For the truncated valve, the internal leakage is not allowed. Leakage after the two called the leak, that media leaks from the valve to the valve outside. Leakage will result in material losses, environmental pollution can also cause serious accidents. The explosive, toxic or radioactive medium, leakage is allowed, and therefore copper valve must have a reliable sealing performance.

Flowing medium

Will produce medium flows through the valve the pressure loss of copper (Cu valve pressure both before and after the poor), that is, copper valve on the flow media have a certain resistance, medium to overcome the resistance of copper valve, it takes some energy. From the conservation of energy considerations, the design and manufacture of copper valves, to minimize copper valve on the flow resistance of the medium.

Hoisting force and hoisting moment

Hoisting force and hoisting moment is brass valves to open or close the force or torque must be imposed. Closed copper valves, need to open two pieces with the fat seat sealing surface seal formed between certain specific pressure, but also to overcome between the stem and the packing between the stem and the nut thread between the stem end bearing at and other friction parts of the friction, and therefore must apply the closing force and closing moments, copper valve opening and closing process, the required closing force and closing moments of change, and its maximum is close to the final instant or open the initial transient. Design and manufacture of copper valve should be sought to reduce the closing force and closing moments.

Hoisting Speed

Hoisting speed is used to complete a copper valve opening or closing time of action needed to represent. Generally copper valve opening and closing speed without strict requirements, but some conditions have special requirements for opening and closing speed, the prompt to open or close, to prevent accidents, and some require slow and shut down to prevent water hammer, etc. , which should be considered in the choice of copper valve type. Action sensitivity and reliability of This refers to the copper valve for the medium parameters change, and make the appropriate degree of sensitivity. For the throttle valve, reducing valve, regulating valve used to adjust the medium parameters brass valves and safety valves, steam traps and other brass valve with a specific function, its functional sensitivity and reliability are very important technical performance indicators.

Life

It indicates the durability of copper valves, copper valve is an important performance indicators, and has great economic significance. Usually guarantee the number of seals required to open and close that can also be used to indicate the use of time.


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