1) The opening of a large opening to extend the life-span method to make the valve at the beginning as far as possible to work on the maximum opening, such as 90%. In this way, cavitation, erosion and other damage occurred in the spool head. With the destruction of the valve, the flow increases, the corresponding valve and then off, so constantly damaged, and gradually closed, so that the entire valve fully utilize until the valve core and sealing surface damage, can not be used so far. At the same time, the opening of large opening throttle gap, erosion weakened, which than the beginning of the valve in the middle of the opening and a small opening work to improve life expectancy of 1 to 5 times. Such as a chemical plant using this method, valve life increased by 2 times. 2) S to increase the work to reduce the opening to increase the life-span method to reduce the S, that is, increase the system in addition to the loss of control valve to reduce the pressure drop assigned to the valve, in order to ensure that the flow through the control valve will inevitably increase the control valve Opening, at the same time, reducing the pressure drop on the valve, cavitation, erosion also weakened. The specific measures are: set the orifice plate after the valve to save consumption pressure drop; close the pipeline on the manual valve in series to the control valve to obtain a more ideal job opening so far. The valve at the beginning of a large opening in the small work, the use of this method is very simple, convenient and effective. 3) reduce the diameter of the work to improve the work life to increase the life of the law by reducing the caliber of the control valve to increase the work of the opening, the specific methods are: â‘ for a smaller diameter of the valve, such as DN32 into DN25; â‘¡ valve The body does not change, replace the valve seat of small valve seat diameter. As an overhaul of a chemical plant will be djl parts dgl0 replacement, life expectancy increased by 1 times. 4) The transfer of damage to the location to improve life expectancy to the place of serious damage to the secondary location to protect the valve seat sealing surface and throttling surface. 5) increase the throttle channel to increase life expectancy Increase the throttle channel is the simplest thickened valve seat, the valve seat hole growth, the formation of a longer throttle passage. On the one hand, it can delay the sudden expansion of the flow-closure type after the throttle, delay the transfer and destroy the position and keep it away from the sealing surface; on the other hand, increase the throttling resistance and reduce the recovery of the pressure, Erosion diminished. Some of the valve seat hole designed to step, wave-type, is to increase the resistance, weaken the cavitation. This method is often used when introducing high-pressure valves in devices and improving older valves and is also very effective. 6) to change the flow direction to improve life Open flow toward the open direction, cavitation, erosion mainly in the sealing surface, so that the valve core and valve seat sealing surface quickly damaged; flow closed toward the closure of the direction of flow , Cavitation erosion role in the throttle after the valve seat sealing surface to protect the sealing surface and the valve root, extending the life. Used as open-flow valve, when the problem of extending life expectancy is more prominent, just change the flow direction can extend the life of 1 to 2 times. 7) Use of special materials to improve life expectancy France is anti-cavitation (damage to the shape of small honeycomb dot) and erosion (streamlined small groove), can be replaced by cavitation erosion and erosion of special materials to create throttling pieces. This special materials are 6YC-1, A4 steel, Secretary too Lai, cemented carbide. For anti-corrosion, can use more corrosion-resistant, and have certain mechanical properties, physical properties of the material. This material is divided into two types of non-metallic materials (such as rubber, PTFE, ceramics, etc.) and metal materials (such as Monel, Hastelloy, etc.). 8) to change the structure of the control valve to improve the life of the law to change the valve structure or choose to have a longer life of the valve approach to achieve the purpose of improving life expectancy, such as the choice of multi-stage valve, anti-cavitation valve, corrosion-resistant valve.
Do one stop lighting solution for real estate lighting project, including real estate lighting design,real estate lightingsolution, real estate lighting drawing,real estate lighting production,real estate lighting delivery and installation guidance. Have more than 20000sqm production line,2000sqm showroom could offer you demo show before shipment.
LAVIUS is appointed by Zhongshan G-Lights Lighting Factory as a high end brand of customized indoor decorative project lighting, locates in lighting capital, Guzhen, China. According to more than one decade exploration, research and development, LAVIUS moving toward to the front high brand of customized project lighting for real estate.
Mid-to-high end project lighting and customized lighting devices
Real Estate Chandelier,Chandelier Floor Lamp,Crystal Chandelier,Luxury Chandelier,European Classic Chandelier
GUANGDONG LAVIUS LIGHTING CO., LTD. , https://www.laviuslighting.com