1, strength properties

Strength properties is the ability. Withstand the internal pressure valve is a mechanical product, and therefore must have sufficient strength and rigidity to ensure the long-term use without breakage or deformation. The product structure with perfect features, the intensity of performance is the ultimate standard of strength properties of the valve.

2, sealing performance

Valve sealing performance is part of the sealing ability to prevent media leaks, it is the valve of the most important technical performance indicators. Valve sealing parts are three: open and close the two pieces with the valve seat sealing surface contacts between the Office; filler stem and the stuffing of the distribution and the Branch; body junctions with the valve cover. Of which the first one is called the leakage of internal leakage, which is commonly known as Guan lax, it will affect the media's ability to cut off the valve. For the cut valve, the internal leakage is not allowed. Leakage after the two called the leakage, that is, medium leaking into the valve from the valve outside. Leakage would cause material loss, environmental pollution can also cause serious accidents. For flammable and explosive, toxic or radioactive medium, leakage is inadmissible and, therefore, the valve must have a reliable sealing performance.

Common valve technology products, whether it is off valves, or regulating valve, the sealing surface will not be any erosion, wear and tear is also extremely small, not afraid of wear, excellent sealing performance can be achieved within and outside the seal zero leakage, save energy , protecting the environment and improve working efficiency.

3, the mobile media

Medium flows through the valve would cause pressure loss (both before and after the valve pressure difference), that is, the flow valve on the media have a certain resistance, medium to overcome the resistance of the valve is necessary to consume a certain energy. From the conservation of energy considerations, the design and manufacture of valves, it is necessary to minimize the resistance of the valve on the flow medium.

Common valve technology products, its flow resistance is extremely small, less than or equal to the valve of the flow resistance, save a lot of energy and transportation costs, improve circulation media.

4, hoisting hoisting force and torque

Hoisting force and hoisting moment is to open or close the valve that must be imposed by force or torque. Close the valve, the need to open and close with the Coma Berenices two pieces of the sealing surface of the seal formed between certain specific pressure, while also overcoming 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 a certain moment, the valve in the open and close the process, the required hoisting hoisting force and moment of change, and its maximum is close to the final instant or open the initial transient. The design and manufacture of valves should be sought to reduce the closing force and closing moments.

Common valve technology products, which ensure the structural features of force and hoisting hoisting moment is very small, greatly improved remote control, automatic control and emergency control.

5, open and close speed

Hoisting speed is used to open or close the valve to complete a movement to represent the time required. Valves open and close speeds generally no strict requirements, but some conditions the speed of the hoist have special requirements, if any, the prompt to open or closed, to prevent an accident, and some require slow and shut down to prevent the resulting water hammer, etc. , which should be considered in selection of valve type.

Common valve technology products, which can open and close speeds need to set, in a state of emergency can be achieved under the open and close very quickly to avoid accidents and improve the processing power.

6, action, sensitivity and reliability of

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

Common valve technology products, their sensitivity and reliability of movement can not match the existing valve to change the safety valve, pipe exhaust valve morphology is so compact, even throttle valve, reducing valve, adjusting valves, valves for aerospace, nuclear grade with the valve, the submarine and the giant of the valve with the valve action is superior sensitivity and reliability.

7, life

It is said that the valve key performance indicators, and has great economic significance. Usually able to ensure that the number of seals required to open and close that can also be used to indicate the use of time.

Common valve technology products, its service life, whether on the open and close times to ensure sealing requirements or use the time to a constant, have very considerable economic significance, and maintenance-free or less to maintain.