Do not switch the valve speed when the reason for the speed and the valve off the handle
Why do not open the valve speed switch? In the pipeline quickly open and close the valve, it will have a water hammer phenomenon, in the pipe close to the valve produced a water hammer pressure value. It is calculated that for every 1 m / s change in liquid flow velocity in the pipe, the pressure generated by the liquid can reach 1 MPa. Not only this pressure value is also propagated upstream in the form of a water surge wave from the pipe segment close to the valve at a speed close to the sonic velocity The speed of the sound in the water is 1500 m / s, and the speed in gasoline is 1100 m / s), it is possible to rupture the pipe by superimposing it with the original pressure at each point along the pipe. Slow, gradually opening and closing the valve, due to the instantaneous time, small changes in speed, the pressure generated by the initial pressure is small, and because of the extension of time, the water shock wave propagation to the upstream, will produce a reflected wave, and thus offset The initial pressure of water hammer, so to avoid the pipeline overpressure accident. Valve is not strict processing methods? 1) Reason: there are debris in the medium, solid particles pad between the valve flap and seat. Valve stem and the valve is not good, so that the valve disc and valve seat can not be closely linked to the deviation. 2) Treatment: to ensure the media clean, if the valve is closed when the valve is found plugged phenomenon, not hard and hard off, you can quickly switch several times, so that pad stuff rushed out. Often to the stem and stem nut plus lubricant, to ensure that the valve switch flexible. Valve can not open, the reason is closed and what is the treatment? I) The reason: there is debris or mismatch between the stem and the stem nut, the stem and the valve disc are separated, the stem and the stem nut are corroded, the valve disc is stressed too much and the packing is too tight. 2) Approach: often to the stem and stem nut lubrication and debris removal; stem and valve from the detachment should be carried out overhaul; valve force is too large, when the buck after opening the valve. Metal stamping Power Metal Stamping Housing
We supply complete toolroom to design, engineering, and fabricate all types of compound die, progressive die, deep draw die, and prepare prototypes to check the parts design and construction before toolings kicked off, to minimize modification cost and maximize manufacturablity. Our high quality cost-effective tooling keeps parts costs down with high productivity, and we repair and maintain all customer dies free of charge for customers for the whole life of your stampings project.
More services we offer:
UPS Power Metal Stamping Housing,UPS Metal Stamping Housing,UPS Metal Stamping Box,UPS Power Plastic Housing Timeplex Industrial Limited , https://www.timeplexhk.com
You can fully understand our capabilities by viewing some pictures of our tools and dies fabrication facilities. Our Advantage:
1. We have been a professional OEM/ODM metal stamping (Aluminum,stainless steel,Copper ,SPCC,SGCC and so on) manufacturer for 30 years in China. 2.Products application: Consumer electronic hardware accessories such as telecommunication aluminum cavity,LED Lighting aluminum housing,Setup box housing,power adapter case ,UPS power housing,STB box,AMPLIFIERS chassis and panel LED driver case ;Thermal solution heat sinks&radiator;Computer hardware accessories;Furniture hardware parts,home appliance etc.
3.Surface treament:Anodizing, powder coating,painting bonding, sand blasting, buffering and assembling,Zinc-plated, nicke plated, chrome-plated, silver-plated, gold-plated,Passivation etc.
4.All parts are customized according to customer's drawings or samples. If you have any parts to beproterotype, please feel free to send your drawings/samples to us
Besides of Metal Stamping Components, we also complete solution for OEM/ODM Products & components, offer services of deep drawing services, EMI metal shielding parts, heat sink ,plastic molding products for custom, Plastic Injection Components, Metal Stamping Parts, home appliances accessories ,R/C drone and smart electronic toys etc.