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The choice of peristaltic pump is mainly affected by four aspects: 1.Hose inner diameter When the speed is the same, the pump flow of the hose having a large inner diameter is greater than the pump flow of a hose having a small inner diameter. 2. Flow range Traffic is an important pump parameter, determined by many factors, for example: Hose inner diameter -------- The larger the inner diameter, the greater the flow rate Pump head speed -------- The larger the speed, the greater the flow rate Pulsation size -------- The larger the pulsation, the greater the traffic 3. Pulse Pulsation is an important selection parameter of a peristaltic pump, which is determined by many factors: Traffic range ------- The larger the flow, the greater the pulsation Pump cavity ------- The larger the pump chamber, the greater the pulsation Rotor speed ------- The faster the speed is pulling, the greater Flow density ------- The higher the density, the greater the pulsation (Note: Value above the parameters. In the reasonable range of normal operation) 4. Treatment of liquid When selecting a peristaltic pump, the nature of the application environment and liquid is also a very important reference factor. The best peristaltic pump and hose can be selected depending on the viscosity, sensitivity, corrosiveness, and hygienic requirements. The peristaltic pump system is suitable for laboratory, industrial and field applications. For chemical industries; mining and metallurgical industries; paper industry; paint coating industry; food industry; ceramic industry; petroleum industry; water treatment industry and other agriculture: feed additive quantitative feed, pesticide spray: biotechnology: Slide, Circulating cell suspension during the fermentation, agar injection into the petri dish; chemical industry: corrosive cleaning agent, elution, flow injection analysis, sewage, sludge analysis, wastewater sample, rainwater soda analyzer; pharmaceutical industry: cosmetics preparation, Decompose experimental equipment, fermentation control, cell culture medium collection, culture bacteria supply, printing industry: lithographic ink quantitative feeding, wastewater treatment: lime quantitative feeding, polymer quantitative feed: water treatment: chlorine analyzer, sewage pH control, silicone water Clean.

The peristaltic pump is typically used to pump clean / sterile or corrosive fluids without contamination of these fluids to be exposed. Some common applications include pumping IV fluids, corrosive chemicals, high solid slurrys, and other materials by infusion devices, wherein the isolation of the product and the environment is essential. It also used to circulate blood during the surgery, because the pump does not cause obvious hemolysis. The peristaltic pump is also used in a variety of industrial applications. Its unique design makes it particularly suitable for pumping abrasive and viscous fluids. Here are some typical applications: drug Dialysis Machine Heart direct viewpack machine Medical infusion pump Test and research Automatic analyzer Analytical chemistry experiment Carbon monoxide monitor Medium dispenser agriculture 'Sapsucker' pump extraction maple juice Food manufacturing and sales Liquid food fountain (such as cheese sauce for cornflakes) Beverage Catering service washing machine fluid pump Chemical treatment Print, paint and pigment Medical production Metering system for dishwasher and laundry chemicals Engineering and manufacturing Concrete pump Pulp and paper mill Trace lubrication Water and waste Water supply plant chemical treatment Sewage sludge Aquarium, especially calcium reactor

Chromium is a microstrip blue silver-white metal with a relative atomic mass of 51.99, a density of 6.98 to 7.21 g / cm3, a melting point of 1875 to 1920 ° C, and a standard electrode potential of Ush / c, -0. 74V, the old "/c," -0.61V and P + s + + Cr + 1.33V, metal chromium in the air easily passivated, the surface layer of a very thin passivation film, which shows the precious metal nature. Chromium layer peristaltic pump has a high hardness, according to the bath composition and process conditions, the hardness can be a wide range of 400 ~ 1200HV changes. Chrome layer has a good heat resistance, heating at 500 ℃ below its gloss, hardness were no significant changes in temperature greater than 500 ℃ began to oxidative discoloration, greater than 700 ℃ hardness began to decrease. The chrome-plated layer is a fraction of friction, especially the dry friction coefficient, which is the lowest among all metals. So the chrome layer has a good wear resistance. Chromium layer has good chemical stability, in alkali, sulfide, nitric acid and most organic acids do not play a role, but can be dissolved in hydrochloric acid (such as hydrochloric acid) and hot sulfuric acid. In the visible range, the reflectivity of chromium is about 65%, between silver (88%) and nickel (55%), and because of chromium does not change color, the use of long-term to maintain its ability to reflect better than silver and nickel

What is a peristaltic pump? I believe most users are not very familiar with this type of pump. Peristaltic pump, also known as the hose pump, is a new type of industrial pump, it is the product of modern industrial development, widely used in pharmaceutical, food, chemical and other industries, transport with some sensitive, viscous, corrosive, grinding, high purity requirements, and containing a certain granular material medium. Structural composition The peristaltic pump consists of three parts: the driver, the pump head and the hose. The fluid is isolated in the pump tube, the pump tube can be replaced quickly, the fluid can be retrograde, can dry run, low maintenance costs, and other characteristics constitute the main competitive advantages of peristaltic pump. Working principle The peristaltic pump is mainly composed of a drive, a hose, a roller 2 installed on the rotor 3 and a shell. Among these members, the hose 1 is made of elastic material such as rubber or plastic, and the rest are metal rigid parts. The movement of peristaltic pump is gentle, suitable for shear resistant fluids. The simple and reliable structure of this pump is also the ideal choice for pumping medium flow, medium pressure wear, fragile and corrosive fluids. They are also simple to maintain as only the hose is in contact with the fluid. The peristaltic pump works by taking advantage of the ability of a soft elastic tube to withstand deformation and return to its original shape. A peristaltic pump is like squeezing a fluid filled hose with a finger clamp. The fluid moves forward as the finger slides forward. A peristaltic pump works the same way except instead of a finger, it has a roller. Fluid is pumped by alternately squeezing and releasing the pump's elastic delivery hose. It is like squeezing a hose between two fingers. With the movement of the fingers, a negative pressure is formed in the pipe and the liquid flows with it. Peristaltic pump is a section of pump tube between two rollers to form a "pillow" shape of fluid. The volume of the "pillow" depends on the inside diameter of the pump pipe and the geometry of the rotor. The flow rate depends on the product of three parameters: the speed of the pump head and the size of the "pillow" and the number of "pillows" produced by each turn of the rotor. The size of the "pillow" is generally constant (except when pumping particularly viscous fluids). Compared with the pump with the same rotor diameter, the pump with the larger "pillow" volume has a larger fluid volume transported by the rotor per revolution, but the pulsation degree is also larger. This is similar to the case of membrane valves. The pump that produces the smaller "pillow" volume, the fluid volume transported by the rotor is also smaller each turn; Moreover, the rapid and continuous formation of small "pillows" makes the flow of fluid more stable. This is similar to the way gear pumps work. classification The use of peristaltic pump is in order to get the required flow, so according to the operation and use of peristaltic pump, divided into: 1. Speed regulating peristaltic pump: With the basic control function of peristaltic pump, display speed, start and stop, direction, speed adjustment, fill empty, power off memory, external control input and other functions. 2. Flow type peristaltic pump: In addition to the basic functions, increased traffic display, traffic correction, communication and other functions. 3. Distributed peristaltic pump: In addition to the basic control functions, it has added flow display, flow correction, communication, liquid distribution, suction, output control and other functions. 4, custom (OEM) peristaltic pump: With a series of different flow range of peristaltic pump head, customers can according to their own equipment needs, design different peristaltic pump driving circuit supporting use. advantage Can handle gas-bearing fluid; Low shear force, can transport shear sensitive, oxidation corrosion sensitive fluid, suspension, wear resistance is strong; The diameter of solids contained in the fluid is allowed to reach 40% of the inner diameter of the tube component; There is only one contact component and no sealing is required. Fluid only contact the pump pipe, and do not contact with any other parts; High precision; Self-priming; Can be idled; With two-way equivalent flow transmission capacity; No liquid empty operation will not cause damage to any parts of the pump; Can produce up to 98% vacuum degree; Only the hose needs to be replaced, and the replacement operation is very simple. shortcomings With flexible pipe, the pressure will be limited, conveying pipe failure will cause product loss; Pump speed is low and vibration is large. The traffic range is narrow. Care and maintenance The maintenance of peristaltic pump is very simple, which is one of its main features! 1. The roller shall be oiled regularly to keep the roller in a good lubrication state. Note: the tightness of the roller should be checked when filling oil. If it is found that the roller is too loose, tighten it with tip pliers. If it is found that the roller has a sense of loosening and cannot be eliminated after adjusting the tightness, then the wear condition of the inner bearing of the roller should be tested twice, and it can be removed to replace the bearing or the roller. 2. The roller bearing should be greased every six months or so. 3. After running for a period of time, the new reducer will drain the oil in the tank and add 30# oil again. We only know that peristaltic pumps have low maintenance costs, but we don't know where. Only those who have used peristaltic pumps will know how much they have saved in using costs. Other pump classes for transmission media maintenance and repair time needs five or six hours, here is not to say what kind of pump class, I believe that used friends understand. The peristaltic pump only needs to replace the pump tube to complete the maintenance work. It also needs to be moved, transferred and reinstalled during maintenance, which takes up additional time. This has a great impact on our work efficiency. In this way, you can think of how convenient the replacement of the pump pipe is. And we can transfer the liquid, choose different prices of the pump pipe. Does the peristaltic pump need cleaning? Does it require maintenance? Peristaltic pump is not needed to clean, because in the transmission process of the liquid will be in contact with the peristaltic pump pump machine, just through the pump tube for transmission. The maintenance cycle of the peristaltic pump body is also very long. If the condition of the pump is better, it only needs half a year to carry out maintenance on it.

The principle of peristaltic pump operation is that there is always a runner that keeps the pump tube in the pump. When the peristaltic pump shaft rotates continuously, the runner will rotate the squeeze hose once, but the runner in the peristaltic pump appears. The two runners simultaneously squeeze the hose, so the hose is alternately squeezed as the runner alternates. When the wheel is turned to the hose outlet, the squeeze received by the hose disappears instantaneously because the wheel loosens the hose. At this time, because the hose is not squeezed, it will immediately return to the non-extrusion state, at which point we will see a sudden decrease in the fluid flow at the hose outlet. At the same time, when the hose rebounds, the volume inside the hose suddenly increases, and the other roller in the pump squeezes the inlet of the pump. The increased volume will automatically suck back from the outlet. The fluid flow at the outlet also suddenly decreases, so that a pulse occurs.

Components of a swimming pool are highly interdependent. Without proper operation of each element, water quality and comfort degrade and damage may occur to other components. The basics of pool design are consistent whether applied to in-ground or above-ground pools. The system is engineered to keep a large volume of water properly filtered, circulated, heated and treated with disinfecting chemicals. The two most critical elements in any pool system are the pump and the filter. Pool Circulation A pool pump circulates water from the pool through the filter and back to the pool. The pool pump is generally located next to the filter in a concrete pit or recess below the water level of the pool so water flows by gravity to the inlet of the pump. Water entering the pump input first passes through a strainer basket in the pump housing to remove debris. Leaving the pump, the water circulates through the filter and then the heater, if one is installed. Water is reintroduced to the pool through return jets embedded in the walls of the pool. In a regularly utilized pool, the pump may run continuously to provide consistent filtration and circulation. To conserve electricity, many residential pool pumps are connected to timers so the circulation is limited only to hours of the day when the pool is likely to be used. Priming The Pump And Filter Occasionally a pool pump may lose its prime and air may enter the system, interrupting circulation of water. The most common cause is evaporation, causing the pool water level to drop below the intakes in the skimmers. Priming a pool pump and filter is a standard procedure in pool systems. Adding water restores the pool's proper water level. You can remove the cover of the pump housing to fill the pump chamber and intake line with water. Once you replace the cover and open the air-bleed valve on top of the pool filter. The intake and discharge valves should be open and you can turn on the pump. When water is seen moving through the clear sight window in the top of the pump chamber, circulation is restored. Wait until water begins to spurt out of the air-bleed valve on the filter, then close the valve. Types Of Pool Filters Pool filters vary according to the media utilized to filter the water. The simplest variety is a common replaceable filter cartridge in a canister installed in the discharge line after the pump. These are typically used in smaller volume, above-ground pools and require no maintenance other than scheduled filter changes. Sand filters used in larger in-ground pools use a bed of industrial-grade silica to filter the water as it percolates under pump pressure through the sand. Another variety utilizes diatomaceous earth as the filter media, a porous powder that provides very fine filtering properties. Both sand and DE filters require periodic backwashing to clean the filter. Pool Filter Settings Pool filter multiport valves have generic settings that apply to all major brands of sand and DE filters. The [Filter" setting circulates water through the sand or DE media, then out the filter through the return port to the pool. The [Backwash" setting redirects the flow of water backwards through the filter media to flush out contaminants as part of scheduled maintenance or when the filter pressure indicates it is becoming obstructed. During backwash, dirty water exits the filter through the waste port and is discharged into the sewer drain. The [Waste" valve position bypasses the filter. Water from the pump enters through the pump port and exits directly through the waste port into the sewer. This setting is used to vacuum the pool or to lower the water level. [Recirculate" also bypasses the filter but sends the circulating water back to the pool instead of down the drain, a useful setting when performing certain chemical treatments that would contaminate the filter media. [Closed" shuts off all water entering the pool.

Injection pumps play an integral role in the operation of diesel-powered vehicles. The part allows diesel cars and trucks to run by delivering an exact amount of fuel, under very high pressure, to each injector at a specified time interval. As the fuel is delivered from the injection pump, each injector disburses the fuel into the motor's cylinders, where it combusts, and keeps the motor running. During routine maintenance, such as fuel filter replacements, you may need to prime the injection pump to remove air from the fuel system. Loosen the nuts connecting the injectors to the motor head. This will allow any air between the injection pump and injectors to exit the system during priming. Insert the key into the ignition. Turn the key to the "on" position and turn it slightly toward the "start" position to bump the starter. Release the key after approximately one to two seconds so that it returns to the "on" position. Listen for the vehicle's electric lift pump to begin transferring diesel from the fuel tank to the fuel filter housing and, in turn, the injector pump. The lift pump will sound like a buzzing coming from the fuel tank. If you do not hear the lift pump working, bump the engine a second time. Work with a partner to watch for fuel coming from the injector lines where you previously loosened the connection nuts. Re-tighten the nuts when fuel begins to flow out of the injector lines. At this time, your injector pump is primed with fuel. With the injector lines re-connected to the head, crank the vehicle and allow it to begin running.

After the filling peristaltic pump encounters problems in the normal production and operation process, it can be quickly eliminated, solve the problems, and avoid affecting the normal operation, which will have important economic significance. According to some problems frequently encountered in daily use of the filling peristaltic pump, some common problems and corresponding solutions are given. When filling large specifications, the feed tank is insufficient to make the liquid level unstable. You can increase the amount of feed or re-close the ball valve above the filling head to reset the filling time (lengthen the filling time) to slow down the filling Install speed to solve. 2. After adjusting the digital dial code or unit, the time does not change: At this time, turn off the power and reconnect the power. 3. The liquid level is stable and the filling volume is not accurate: There is debris blocking the filling channel, mainly at the entrance of the trough or in the filling mouth, check and clean it up. 4. There is a drip after closing: 1. The orifice of the filling nozzle is damaged, the filling nozzle can be taken out to repair the orifice. 2. The ball valve in the filling head is damaged, and the ball valve needs to be replaced. 5. No filling after touching the filling switch, the time relay digital indicator LED does not flash: The injection switch is damaged or the base of the time relay is loose, replace the injection switch of the same model or press the base of the time relay tightly.

The micro diaphragm pump is actually a micro vacuum pump. This kind of pump has one suction nozzle and one exhaust nozzle. The internal mechanical device makes the diaphragm inside the pump reciprocate, and it can continuously form a vacuum at the inlet. Or negative pressure, a slight positive pressure is formed at the exhaust nozzle; the working medium is mainly gas, and a compact instrument. The micro diaphragm pump is easy to move and install. It has a self-priming function. The built-in pressure automatic switch controls and protects the pump. The medium temperature can reach 60°C, low noise, corrosion resistance, high pressure, and the self-priming height can reach 5 meters. Micro diaphragm pumps are widely used in reverse osmosis water purification systems, filters, spray devices, industrial equipment, chemical metering and liquid addition, sanitation, environmental protection, printing and other industries. Specifically, the micro diaphragm pump can meet the needs in the following areas. 1. Solve the use of water for eating, washing, bathing, toilet and flushing in vehicles, ships, yachts, etc. (1) Water supply system for toilets and drinking fountains of high, medium and low-grade passenger cars. (2) Water supply system for all kinds of RVs, field campers, and family recreational vehicles. (3) Other special vehicles, such as blood collection vehicles, ambulances, television relay vehicles, survey vehicles, engineering vehicles, and other vehicles with water systems. (4) Water supply systems for various ships and yachts. After installing matching filters, water can be taken directly from the sea, rivers, lakes, ponds, and wells. 2. Food and beverage processing and processing equipment to realize the transfer, distribution, and filling of fluid food. 3. Household water supply. 4. Solar energy industry. 5. Other equipment and systems that require liquid transfer and spraying. For example, cleaning equipment, road construction equipment, purification equipment, cooling systems, etc.

Application of micro peristaltic pump in fully automatic washing machine: Large automatic washing machines need to add various chemical agents quantitatively and regularly to complete the entire automatic washing process. Because the hose of the peristaltic pump can withstand various chemicals, there is no possibility of cross-contamination, it has good sealing, and can accurately meter and pump viscous liquids. It is only suitable for this task to be completed by the peristaltic pump. Because the detergent has a certain viscosity, when choosing a peristaltic pump, it is necessary to choose a peristaltic pump with a relatively thick hose wall thickness as much as possible, so that the performance of the peristaltic pump can be better reflected. Using a peristaltic pump to complete this work can realize automatic and accurate measurement of how much detergent should be added according to the amount of clothing, so as not to waste detergent or lack of detergent, which reduces environmental pollution and water waste. It also saves the cost of manual addition, and washing machines with detergent added by peristaltic pumps will be more and more recognized by users and become an indispensable part.

At present, micro-chemical technology has reached the forefront of large-scale industrialization, and is becoming an important means and way to solve many problems that currently plague the development of the chemical industry and realize intelligent manufacturing. With the strengthening of the cooperation between academia and industry, the industrialization of micro-chemical technology is gaining momentum, and the dawn of full industrialization has emerged. This is the message delivered at the Micro Chemical Reaction Technology and Intelligent Manufacturing Industrialization Promotion Conference held in Qingdao, Shandong Province on June 6. The conference was hosted by the Rubber and Plastic Products Green Manufacturing Professional Committee of the China Chemical Industry Society and co-organized by China Chemical Industry News. More than 150 representatives attended the conference. Tu Shandong, former vice president of East China University of Science and Technology, believes: "At present, the dawn of the full industrialization of micro-chemical machinery technology has emerged, and the intervention and support of entrepreneurs who are brave to innovate are urgently needed. In the past 10 years, the research of micro-chemical machinery systems has made considerable progress. Progress, related literature has grown exponentially, covering the fields of analytical chemistry, physical chemistry, applied chemistry and electrochemistry in the field of chemistry. At the same time, micro-chemical machinery technology has also been successfully demonstrated in the fields of chemical engineering, biology, power and other engineering. Laid the foundation for large-scale industrialization." Zhang Liqun, a professor at Beijing University of Chemical Technology, said that the original technology innovation in the chemical industry is becoming more and more important, and the key to the original technology innovation lies in interdisciplinary and basic research. All parties communicated and exchanged in-depth. Wang Kai, an associate professor in the Department of Chemical Engineering of Tsinghua University, said that the chemical synthesis industry is currently facing many challenges. While producing the chemicals needed by humans, it will also generate a large amount of waste, which will cause environmental pollution if not handled properly. How to achieve green, safe and efficient chemical production is related to the healthy development of the national economy and the improvement of the human living environment. In fact, through the application of micro-chemical technology, it is entirely possible to effectively control complex chemical reactions, achieve efficient, safe and clean production, reduce the occurrence of side reactions, and reduce the emission of "three wastes". The main way is to improve the reaction. The response performance of the device. The micro-chemical system has the characteristics of fast mixing rate, high mass transfer coefficient, short residence time, high production efficiency, process safety, easy control, small amplification effect, and low industrialization risk.