The so-called rational selection of pumps, is to comprehensively consider the pump unit and pumping station investment and operating costs and other comprehensive technical and economic indicators, to make it in line with economic, security and applicable principles. Specifically, the following aspects must be met: the flow rate and head lift of the pump must be met, that is, the point at which the pump runs (the intersection of the device characteristic curve and the pump performance curve) is often maintained in an efficient range, Power is not easy to damage the mechanical parts. The selected pump should not only small size, light weight, low cost, but also have good characteristics and high efficiency. Has good anti-cavitation performance, so that not only can reduce the depth of the excavation of the pump room, but also to pump cavitation, smooth operation, long life. According to the selected pump built pumping station, less investment, low operating costs. Pump selection step A, lists the basic data: 1, the characteristics of the media: media name, specific gravity, viscosity, corrosion, toxicity and so on. 2, contained in the media due to the body particle diameter, content how much. 3, the medium temperature: (℃) 4, the required flow General industrial pumps in the process can be ignored in the pipeline leakage, but must consider the impact of process changes on the flow. Agricultural pumps if the use of open channel water, but also must consider the leakage and evaporation. 5, pressure: suction tank pressure, drainage tank pressure, pressure drop in the piping system (head loss). 6, the piping system data (diameter, length, type and number of pipe fittings, water tank to the pressure tank geometric elevation, etc.). The device characteristics should also be made if necessary. In the design and layout of the pipeline, should pay attention to the following: A, a reasonable choice of pipe diameter, pipe diameter, the same flow, the flow velocity is small, the resistance loss is small, but the price is high, the pipe diameter is small, will lead to a sharp increase in resistance loss Large, so that the pump lift the selected increase, with increased power costs and operating costs have increased. Therefore, it should be considered technically and economically. B, discharge pipe and its fittings should consider the maximum pressure that can bear. C, pipe layout should be arranged as straight pipe, pipe fittings to minimize and minimize the length of the pipeline, you must turn when bending the elbow bend radius should be 3 to 5 times the pipe diameter, the angle is greater than 90 ℃. D, the discharge side of the pump must be installed valves (ball valve or globe valve, etc.) and check valve. The valve is used to adjust the operating conditions of the pump. The check valve prevents the pump from reversing when the fluid is flowing backwards and prevents the pump from hitting the water hammer. (When the liquid back, it will have a huge reverse pressure, so that the pump damage) Second, to determine the pump head flow to determine a, if the production process has been given the smallest, normal, maximum flow, should be considered the maximum flow. b, if the production process is only given normal flow, should consider leaving a certain margin. For ns> 100 large low-flow pump with its head, the flow margin taken 5%, ns c, if the basic data only to the weight flow, should be converted into volume flow.
Amber LED
We are Amber LED manufacturer from China.
1, Variety of wavelength available: Amber 595nm LED, amber 598nm LED, amber 590nm LED, amber 595nm LED, amber 598nm LED, amber 610nm LED, amber 615nm LED and so on.
2, Variety of power available: We can supply amber LED with 0.06W amber LED, 0.1W amber LED, 0.2W amber LED, 0.5W amber LED, 1W amberLED, 3W amber LED. We can also produce customized single chip amber LED, double chips amber LED, three chips amber LED or multi chip amber LED for you.
3, The length of pin: LED Lamp's pin can be 17mm, 29mm, 90 degrees bent feet, braided pin and so on. Tips: taping pins can operate on a robot, greatly improving the efficiency of manual plug-ins.
4, Multiple Shape/Size selection:
· amber Through-hole LED: 3mm round amber through-hole LED, 4mm round amber through-hole LED, 5mm round amber through-hole LED, 6mm round amberthrough-hole LED, 8mm round amber through-hole LED, 10mm round amber through-hole LED, 3mm flat top amber through-hole LED, 5mm flat top amber through-hole LED, 346 amber through-hole LED, 546 amber through-hole LED, 5mm Straw Hat amber through-hole LED, 8mm Straw Hat amber through-hole LED, 5mm short head amber through-hole LED, 3mm Short Head amber through-hole LED, 234mm Square amber through-hole LED, 255mm Square amber through-hole LED, 257mm Square amber through-hole LED.
· Amber SMD LED: 2835 amber LED, 3528 amber LED, 3020 amber LED, 3014 amber LED, 3030 amber LED, 3535 amber LED, 5730 amber LED, 5050 amberLED, 2835 2-chip amber LED, 5050 3-chip amber LED ect.
5, Variety of angle available: 5 degree through-hole LED, 20 degree through-hole LED, 30 degree through-hole LED, 40 degree through-hole LED, 45 degree through-hole LED, 60 degree through-hole LED, 90 degree through-hole LED, 120 degree through-hole LED, 140 degree through-hole LED ect.
6, Colorful epoxy: water clear, diffused, amber water clear and amber diffused ect.
We will do the High temperature resistance testing and 10 hours ageing treatment before the product out off the factory, which can ensure the stability of each product. Our LED products have 5 year warranty. Please believe that we are the best supplier for your light-emitting diode.
It
is suitable for LED lights, LED traffic lights, LED
backlighting, Led street lights, LED lights decoration, Led lighting
products, Disney toys, lighting engineering and other fields. In the past 18 years, we have
been appreciated and recognized by our customers.
Amber LED,5mm Amber LED,595nm Amber LED,610nm Amber LED,3mm Amber LED,SMD Amber LED
Shenzhen Best LED Opto-electronic Co.,Ltd / BESTSMD CO LIMITED(HK) , https://www.bestsmd.com