Tag Archives: gas Valve Manufacturer

Strength properties
Performance refers to the ability. Valve to withstand the internal pressure of mechanical products, and therefore must have sufficient strength and stiffness in order to ensure long-term use without breakage or deformation. Have the perfect product structure characteristics, the performance of its strength is the ultimate standard strength properties of the valve.

Sealing performance

Refers to the valve part of the sealing to prevent media leaks, it is the valve of the most important technical performance indicators. Sealing valve there are three: opening and closing with the valve seat sealing surface between the contact points; filler stem and the stuffing of the distribution and disposal; body and bonnet connections. Which a leak is called leakage, is usually as loose, it will affect the ability to cut off the valve media. Cut 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. Inflammable, explosive, toxic or radioactive medium, leakage can not be allowed, therefore, the valve must have a reliable sealing performance.

Common valve technology products, regardless of the shut-off valve, or valve, the sealing surface will not be any erosion, wear tiny, but also afraid of wear, excellent sealing performance can be achieved within and outside the sealed zero leakage energy savings protecting the environment and improve work efficiency.

Flow of media

Media flow through the valve pressure loss (both before and after the valve pressure difference), but also have a certain resistance is the flow valve on the media, the media, it takes some energy to overcome the resistance of the valve. From the conservation of energy considerations, the design and manufacture of valves, to minimize the resistance of the valve on the flow medium. Common valve technology products, the flow resistance is extremely small, less than or equal to the ball valve flow resistance, and save a lot of energy and transportation costs, improve the liquidity of the media.

Opening and closing force and the opening and closing torque

Opening and closing force and closing moments of the valve to open or close that must be imposed by force or torque. Close the valve, opening and closing parts of the fat seat sealing surface between the formation of a seal pressure ratio, but also to overcome between the stem and the packing between the stem and the nut thread, the stem end bearing at friction and other friction parts, and therefore must apply the closing force and closing moments, the valve opening and closing process, the required opening and closing force and the opening and closing moments of change, and its maximum is close to the final instant or open the initial transient. Design and manufacture of valves should strive to reduce the closing force and closing moments. Common valve technology products, and its structural features to ensure the hoisting hoisting force and torque are very small, greatly improve the ability of the remote control, automatic control and emergency control.

Opening and closing speed

The opening and closing speed valve to open or close action the time required to represent. Generally no strict requirements on the valve opening and closing speed, but some conditions the speed of the hoist there are special requirements, if the requirements to quickly turn on or off, to prevent accidents, and some require the slow and shut down to prevent water hammer This selection of valve types should be considered. Common valve technology products, the opening and closing speed can be set accordingly, in a state of emergency can be achieved very fast speed of opening and closing, to avoid accidents and improve the processing capacity.

Sensitivity and reliability

This refers to the sensitivity of the valve for the medium parameters, and respond accordingly. For the valve of the throttle valve, pressure reducing valve, regulating valve used to adjust the medium parameters of the valves and safety valves, steam trap with a specific function, the sensitivity and reliability of its function is very important technical performance indicators.

Common valve technology products, its movement sensitivity and reliability unmatched by existing valve to change the safety valve, the morphology of the pipe of the exhaust valve to make it compact, even if the throttle valve, reducing valve, regulating valve, aerospace valves, nuclear grade Sensitivity and reliability of the valve, the submarine valves and giant valves are very superior.

Life of

It said that the valve key performance indicators, and has great economic significance. Usually able to ensure the sealing requirements of the opening and closing times, you can also use time to represent. Common valve technology products, its service life, whether by way of guarantee seals required to open and close or use the time constant, have a very considerable economic significance, and maintenance-free or less to maintain.