Eight energy-saving pump coup

Eight energy-saving pump coup:

1, try to shorten the pipeline.

2, no "anti-aircraft" style outlet. Because of this outlet to increase energy consumption. At the same time to make the pump outlet is facing the pool.

3, try to increase the outlet pipe diameter.

4, promptly clear the pipe blockage. Foreign matter left in the inlet pipe, impeller or diversion channel, will reduce the amount of water.

5, try to use the direct drive coupling, it is because the direct drive coupling than the belt transmission efficiency.

6, under the premise of ensuring clean water, remove the filter.

7, to the pump seal parts carefully check to prevent the pump air intake. If the pump into the air, the amount of water will be significantly reduced.

8, can use the motor do not have a diesel engine or gasoline engine, conditional three-phase asynchronous motor without single-phase asynchronous motor.

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Small submersible pump to use the seven points

Small submersible pump to use the seven points:

Small submersible pump compact and lightweight, farmland irrigation and farm life water can not be separated. In order to avoid accident during use, extend the service life, to play its excellent performance, the use should pay attention to the following seven points:

1, install leakage protector

Leakage protection, also known as lifeguard, its role from the "lifebinder" these three words can be understood. Because the submersible pump works underwater, it is easy to cause electric leakage due to leakage and even cause electric shock accident. If leakage protector is installed, the leakage protector will cut off the power of the submersible pump as long as the leakage value of the submersible pump exceeds the operating current value of the earth leakage protector (usually not more than 30 milliamps), so as to avoid electric leakage and waste of electric energy to ensure safety.

2, the power voltage is abnormal Mo boot

Rural areas due to the low voltage power supply line is longer, the end of the line voltage is too low. When the phase voltage is lower than 198 volts, the line voltage is lower than 342 volts, the submersible pump motor speed drops, when less than 70% of the rated speed, start the centrifugal switch will be closed, resulting in a long time winding start energized or even burn out Windings and capacitors. In contrast, overvoltages cause the motor to overheat and burn the windings. Therefore, the submersible pump operation, the operator must always observe the power supply voltage value, if less than 10% of the rated voltage below 10% above the rated voltage, the motor should be stopped to find out the cause and troubleshooting.

3, to avoid frequent switching

Do not switch submersible pumps frequently, this is because the pump will stop when the flow back, if immediately start, the motor load will start, causing the starting current is too large and burn the winding. As the start-up current, frequent start-up will also burn the submersible pump motor windings.

4, let submersible pump long-term overload work

To avoid long-term overload of submersible pump work, do not pumping large amounts of water and observe the current value is on the nameplate if the value specified, if the current is too large, should be shut down for inspection. In addition, the pump running time dehydration should not be too long, so as not to overheat the motor and burned.

5, the direction of motor rotation to be correct

There are many types of submersible pump forward and reverse when the water can be, but the reverse is small, the current is large, the reversal of a long time will damage the motor windings.

6, cable installation and submersible pump insulation resistance requirements

When installing submersible pump, the cable should be overhead, the power cord should not be too long. Submersible pump into the water or made when not to force the cable, so as not to cause the power cord rupture. Submersible pumps do not sink into the mud during work, otherwise it will lead to poor motor cooling and burn motor windings. When installed, the insulation resistance of the motor should not be less than 0.5 megohms.

7, Qinqin see found timely repair problems

Normally, always check the motor. If there is a crack in the lower cover or damage or failure of the rubber seal ring, it should be promptly replaced or repaired to prevent water from entering the submersible pump.

More Search Keywords: Pumps

A rotor is plalced eccentrically toward the cylinder in the space enclosed with the cylinder and the side paltes,and each component is precisely sdjusted and cconstructed with minimum clearance.
With centrifugal effect created when the rotor turns,the vanes inserted in cuts of the rotor continuously slide on the inner wall of the cylinder.

SPECIFICATIONS FOR Electric Vacuum Pump Kit 28146
OE Number	28146	Vacuum Control Included	YES
Part type	Vacuum Pump	Mounting Insulators Included	YES
Maximum Vacuum (hg)	20	Switching Relay Included	YES
Power Supply	12V DC	Height (in)	7.000 in
Vacuum Hose Included	YES	Length (in)	8.000 in
Vacuum Hose Color	Black	Width (in)	5.000 in
Vacuum Gauge Included	NO	Quantity	Sold as a kit

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Wanray accept the customer`s complaining day and night, then solve it at the right time.

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Gear pump selection

Gear pump product selection of the basic principles and methods of operation

In general, the design institute in the design of equipment, to determine the purpose and performance of the pump and select the pump. This choice must first choose from the type and form of the pump, the pump is very diverse, according to different working conditions selection varies, then what principle to choose the pump? What is the basis?

First, understand the principle of pump selection 1, the type and performance of the selected pump in line with the device flow, head, pressure, temperature, cavitation flow, suction and other process parameters.
2, must meet the characteristics of the media requirements. Pumps that deliver flammable, explosive toxic or valuable media require dependable shaft seals or leak-free pumps such as magnetically driven pumps, diaphragm pumps, shielded pumps. Pumps that deliver corrosive media require convective components to be corrosion resistant, such as Verderair Pneumatic Diaphragm Pumps and Verdermag Magnetic Drive Pumps. Pumps containing solid particulate media, or media containing more solid particles, are required to have a wear-resistant material for the convection components and flush with the cleaning fluid if necessary.
3, high mechanical reliability, low noise, small vibration.
4, the economic should take into account the equipment costs, operating costs, maintenance costs and management fees the lowest total cost.

5, centrifugal pump with high speed, small size, light weight, high efficiency, large flow, simple structure, infusion without pulsation, stable performance, easy operation and maintenance features such as convenience. Therefore, in addition to the following circumstances, the centrifugal pump should be used as far as possible:

a, a measurement requirements, the choice of metering pumps, peristaltic pumps, hoses b, high lift requirements, flow is small and not suitable for small flow high-lift centrifugal pump can be used, the choice of reciprocating pumps, piston pumps, such as Cavitation requirements can also be used less vortex pump, vane pump.
c, low lift, large flow, the choice of axial flow pump and mixed flow pump.
d, medium viscosity (greater than 650 ~ 1000mm2 / s), consider the choice of rotor pump or reciprocating pump (gear pump, screw pump)
e, gear pump medium gas content of 75%, the flow is smaller and the viscosity is less than 37.4mm2 / s, the choice of vortex pump.
f, on the occasion of frequent start or pump inconvenience occasions, should use self-priming pump performance, such as hose pumps, self-priming vortex pumps, pneumatic diaphragm pumps.

More Keyword Search: Gear Pumps

Trapezoidal Sheet Roll Forming Machine also have too many size,color and type, usually we produce the machine according to customers request, Trapezoidal Sheet are widely used in various industrial factory, civilian building, warehouse and easy steel building manufacturing, and have features such as nice appearance and durable, beautiful, classical appearance and grace taste.actually this machine parts is same as the Corrugated Roofing Roll Forming Machine . Equipment components: Man-made uncoiler, Roll Forming Machine, computer control system, hydraulic control system, cutting.

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Prevention and Control Method of Pepper "Two Scorpions"

The "two pods" of the peppers, tea sorghum and cinnabar, are pests that injure pepper's young leaves. Widespread throughout Guangxi. The oviducts and pupa clusters were fed on the young leaves. After the plants were damaged, the brown leaves were shiny and the leaves were distorted and drooped. When they were severe, they stopped growing and the leaves fell off. The cinnabar leafhopper also sucked sap from the back of the leaves of the sorghum and Ruoqiang. The victim's leaves had yellowish-white spots, and when the leaves were severe, the leaves turned yellow and fell off. "Two quail" food is very miscellaneous, in addition to harm pepper, but also harm melons, beans, tomatoes and other crops.
First, the main features of the form. (1) Tea-yellow pheasant: Its male body is 0.19 mm long and has an approximately hexagonal body. The body is light yellow or yellow-white, translucent, shiny, and conical at the end and amber in color. The front foot has 3 to 4 pairs of bristles, which are long and thick. The female body is about 0.21 mm in length and has a wide oval body. Its body color resembles that of a male mantis, its body segments are not obvious, and its body back has a longitudinal leucorrhea. The legs are short, with 4 pairs of bristles on the ventral surface of the hind foot. Eggs, long oval, 0.1 mm long, milky white translucent, egg table with vertical arrangement of white knob-like protrusions of 5 to 6 lines. Cubs are oval, light green and have a pair of bristles at the end of the abdomen. If the pupa is a quiescent development stage from the development of pups to pupa, it is 0.15 mm in length and has an oblong shape. The body covers the skin of the cub. (b) Cinnamomum cinnamomea: The female pheasant is greenish black or yellow, and there are long, stripe-shaped spots in the middle of both sides of the body. The back is elliptical and about 0.46 mm long. The male's back is nearly triangular, smaller than females and 0.26 mm long. Oval, colorless at the time of first birth, dark-graded to a dark color, with a red eye diameter of 0.13 mm before hatching. The young hatchling is colorless and transparent at the beginning of hatching, and is dark green after eating. Red eyes, round body, only three pairs of feet, if the early stage Ruoqiang and late Ruoqiang, there are four pairs.
Second, a brief life habits. (1) The Camellia sinensis was observed in Guangxi in the anniversary. It seems that there is no apparent overwintering phenomenon. In the greenhouse, 25 to 30 generations can be produced in one year. Chengyu grows and reproduces normally in relatively dry weather, but hatching of the eggs requires high humidity. The females lay more eggs in the depressions on the back of the young leaves. A female quail usually lays more than one hundred eggs, mainly hereditary reproduction. (b) Cinnamomum cinnabarinus, who also has more than 20 generations in one year, and spends wintering on bark or cotton litter. When the average temperature is between 7 and 130C, females spawn. The most suitable temperature and humidity (22 ~ 270C and relative humidity below 75%), generally 5 to 7 months of drought and less rain is divided into heavy damage. The female adults lay their eggs on the back of the leaves, and if they can crawl, they can also lead the wire and droop by the wind.
Third, prevention and treatment methods. (a) Elimination of overwintering sources. After harvesting vegetables such as Daejeon, it is necessary to remove the weeds in the fields and the fallen leaves. In plastic greenhouses and greenhouses, the population of Astragalus membranaceus is relatively low in winter and should be eradicated in time to prevent outgrowth. (b) Chemical control. The "two gongs" have a short life cycle, rapid reproduction and many generations. We must adhere to the principles of early treatment, ovicide and early infancy. The spraying focused on the young part of the plant and the back of the leaf. In the early days of the field, it can be used as follows: 125% extinction manganese WP or 35% chlorate EC or 40% mercurite EC or 20% oxazine EC 1000x; 25% NISOL or 75 % Kete EC 2000 times; 3 Uranus EC 3000 times spray. The above pesticides are preferably used alternately, sprayed once every 7 to 10 days, and sprayed three times to control their damage. Dicofol, due to its resistance to the tea plant, is not suitable for reuse; dichlorvos, malathion, dimethoate, and omethoate have little effect on control and should be avoided, so as not to delay timing.

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RICHARD MILLE and NTPT successfully combine gold and synthetic materials

The Swiss watch brand and North Thin Ply Technology are the first to present two of the world's first materials: Gold Quartz-TPT® and Gold NTPT carbide, the first to incorporate quartz or carbide in gold foil. Two new materials will be used in Richard Mille RM 07-01 and RM 037 two women's watches.

RM 07-01

In 2016, Richard Mille introduced NTPT's cutting-edge technology to its two ladies' watches, MR 07-01 and RM 037. As a grand occasion, the brand presented two special editions, one each with quartz or carbide-bonded gold foil, underscoring Richard Mille's and NTPT's determination to be king in their respective fields.

RM 037

Driven by the same enthusiasm, the two companies formed a new spark of creativity by launching a series of research projects.

The cooperation between the two parties begins with the development of NTPT carbides and Quartz-TPT®. Both materials have been the ingredients of the branded case and main splint since its inception, helping Richard Mille, headquartered in Switzerland, make a big leap forward in ruggedness and crashworthiness. The extreme physical properties of the two synthetic materials make them difficult to use for general mechanical molding, driving both companies to spend considerable time developing new machine manufacturing processes and cutting tools for carbon and quartz. Watches made with these new materials are more eye-catching than the traditional gold or platinum case, making it memorable.

Richard Mille is now the original men's wristwatch exclusive material applied to the women's watch to meet the unique finishing effect of their women rush. Together with NTPT, the brand presents a combination of Gold Quartz-TPT® and Gold NTPT carbides to further expand the look of women's case material.

The new NTPT technology continues the technology of quartz-TPT® quartz or NTPT carbide embedded layer by layer at 45 degrees with dozens of layers of foil less than 10 microns thick. Because gold is a precious metal in the chemical classification, it is a very difficult task for NTPT and Richard Mille engineers to "blend" them correctly with carbon and quartz.

This process also demonstrates the characteristics of a variety of materials, make the case line under the light reflex more prominent, creating a charming gold gradient effect. The overall shape of the 5N red gold in the satin matte finish and polished polished, with hundreds of diamonds dial and the central mother of pearl or black onyx decoration against the more exciting.

Gold Quartz-TPT® and Gold NTPT Carbide will be exclusively used in RM 07-01 and RM 037 Ladies Watches, each featuring a unique turner. Following the titanium alloy, ceramic and sapphire case version, the two new work once again the technology processing materials used in women's watches, to further enrich the look of their series.

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How to implement "proportionate" meals

The essence of rational nutrition is comprehensive and balanced. The purpose of food diversification is to obtain comprehensive nutrition from various foods; to eat a variety of nutritious food group foods in proportion, it is necessary to eat according to the recommended intake to obtain a balanced nutrition. In real life, eating out of proportion happens:

Some children do not like to eat vegetables, especially do not like to eat green leafy vegetables. Such children often have dry stools or constipation, upper respiratory tract infections, and even bronchitis or pneumonia. The reason is that green leafy vegetables are rich in carotene, which can be converted into vitamin A in the body and is the protective god of the human mucous membrane.

Some children like to eat leeks, even to the point of "no time to eat." Pork contains more fat, and the energy intake cannot be used. Instead, it is stored as fat, which increases body weight. At the same time, excessive intake of leek also causes excessive protein intake, making the child's environment become weakly acidic. , commonly known as "acidic body." Such children have poor resistance and are prone to illness, and they are psychologically rebellious.

Some children who do not love milk will have insufficient calcium intake. Children who do not eat fruit may lack vitamin C.

Eating a variety of nutritious foods in proportion can make the diet structure reasonable and maintain a balance between various nutrients. This is one of the important dietary principles to ensure the healthy growth of children.

To implement proportional eating, do two things:

1. Each household must have a daily recommended amount of food suitable for this age range.

2. For children with poor dietary habits, they must take appropriate corrective measures.

The recommended energy intake for boys aged 3-7 years is 1350-1800 kcal per day, and the recommended energy intake for girls is 1300-1700 kcal per day. The recommended daily intake of each group of foods in this age group is as follows:

1) Food group: 200-250 g/person per day. Meals should be dominated by cereals. Pay attention to the combination of fine grains, such as whole wheat bread, multi-grain bread, cereal, steamed sweet potato, boiled corn, and beans. However, it should be noted that the intake of cereals should not be too high and should be eaten in moderation. It is unscientific to say that eating more grains is beneficial to children's health, because excessive dietary fiber in the grains can affect the absorption of calcium, iron, and zinc in foods.

2) Vegetable group: 150 to 250 g/person per day. One-third or half of them should be green or dark green vegetables, but also include red and yellow vegetables. Note that the amount of vegetables must be greater than the amount of leeks. To increase the variety of vegetables, reasonable cooking to increase the intake of children's vegetables.

3) Fruit group: 100 to 150 g/person per day. Fruits can be eaten in the morning, fruits and vegetables can not be replaced with each other, to eat with. Anti-season fresh fruit should be eaten carefully. Do not eat fruit before going to sleep, you can eat the rest of the time.

4) Animal food group: Livestock fish meat 105 to 125 g/person per day. Poultry, livestock, and river foods should be eaten in rotation. Pork has high fat content. It can appropriately increase the intake of aquatic products and poultry and reduce the amount of pork. Animal viscera is rich in iron, eat 1 to 2 times a week. Eggs: 50 grams per person per day.

5) Milk and dairy products, soymilk and soy products group: 200-400g of fresh milk per person per day, conditional, once in the morning and evening. Children who do not like to drink or drink gastrointestinal discomfort can try to replace it with yogurt or other dairy products, or they can also drink soy milk. Soy products (such as dried bean curd): 25 to 50 grams per person per day.

6) Grease and sugar group: Grease 15 to 20 grams per person per day. Sugar 10-15 grams per person per day. Salt 2 to 3 grams per person per day, dishes should not be salty.

The recommended intake of the above groups of foods generally refers to the raw weight of the food. Specific implementation should also pay attention to the reasonable combination of food groups: the main and non-staple food collocation; with vegetarian dishes; animal and vegetable protein collocation, to promote eating more soy products; vegetables and fruits with. Pay attention to the principle of not only balanced nutrition but also easier implementation of food diversity.

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Knowledge Hall: Turbomolecular pumping system basic operation

The turbo-molecular pump extraction system with separate roughing lines shown in Figure 1 operates in a similar manner to the diffusion pump extraction system. Before starting rough pumping, the high vacuum valve and roughing valve are closed while the foreline valve is open. First, close the front-stage valve, start roughing pump (also front-stage pump), open roughing valve to start vacuuming the vacuum chamber. Turn off the roughing valve when the pressure in the vacuum chamber drops to 150 ~ 100Pa, open the foreline valve, and then start the turbo molecular pump (need to connect the cooling system first). If the inlet of the molecular pump is filled with liquid nitrogen cold trap, liquid nitrogen should be filled after the pump is accelerated to rated speed (usually 5 ~ 10min).

Figure 1 Typical turbomolecular pumping system

1. Turbomolecular pump 2. Liquid nitrogen cold trap 3. Bleed valve 4. Ionization gauge 5. Heat conduction gauge 6. Roughing valve 7. Mechanical pump 8. Foreline pipe valve 9. High vacuum valve coarse pumping system configuration With the volume of the vacuum chamber and the size of different. For 500L / s or smaller turbo molecular pump, a two-stage rotary vane pump can be used; while the turbopumps with a capacity of 1000L / s and more adopt the mechanical pump as the primary pump's Roots pump unit. Close the roughing valve at a pressure of 100 to 150 Pa and switch the vacuum chamber to the turbomolecular pump. For some pumps, doing so causes a slight, but slow, instantaneous deceleration, but this has no effect on pumping. Just as the diffusion pump extraction system, the most important substance in the turbomolecular pump system is water vapor, and its pumping time will be governed by the liquid nitrogen trap pumping speed. Without a liquid nitrogen cold trap, the system will pump water slightly slower than a cold-trap diffusion pump of the same pumping speed. At the very beginning of a high-vacuum pumping process, the pump's large, unbaked interior surface will adsorb water and then be released again at a lower pressure. This effect is more pronounced in valveless systems because it may adsorb more water vapor than a valved system that is not exposed to air at pressures higher than 150 Pa.

When the system is shut down, close the high vacuum valve first, and if there is a liquid nitrogen cold trap, heat the trap. After the cold trap reaches the equilibrium temperature, turn off the foreline valve, and then cut off the power supply of the turbopump motor to decelerate the molecular pump rotor. In general, it takes ten minutes or more until the pump rotor stops completely. During the deceleration of the molecular pump rotor, the hydrocarbon vapors from the foreline hydrocarbons and turbomolecular pumps rapidly diffuse to the area above the pump inlet. To prevent backflow of the mechanical pump vapor and turbo molecular pump lubricant vapors, the molecular pump is deflated with a dry reverse flow of air after the power to the turbo pump motor has been switched off. For example, when the pump rotor speed drops to about 50% of the maximum speed, argon or nitrogen should be continuously charged somewhere above the pump inlet or above the rotor assembly until the pressure in the pump reaches atmospheric pressure. This can be done properly by filling the valve 3 (see Figure 1) with gas. Turbomolecular pumps should not be filled with air at atmospheric pressure often when operating at rated speed. This is detrimental to the life of the shaft. After the current level pipeline valve is closed, the mechanical pump system can be switched off, and the deflation valve can be used to deflate the mechanical pump. Turn off the cooling water immediately after shutdown to prevent internal condensation. In normal operation, the water temperature can be adjusted slightly above the dew point to eliminate possible condensate outside the pump body. Start the system to connect the cooling water flow, open the foreline valve, and then start the mechanical pump and turbo molecular pump. After the pump is accelerated to the rated speed (typically 5 to 10 minutes), the liquid nitrogen cold trap can be filled. The vacuum chamber can then be evacuated as described in the previous section. The extraction system shown in Figure 2 without the use of high vacuum valves is much easier to operate than a valved extraction system. Operation, first open the cooling water and the foreline valve, and at the same time start the mechanical pump and turbo molecular pump. If the roughing pump is properly chosen so that the roughing time of the vacuum chamber is equal to the acceleration time, the vacuum system can pump the vacuum chamber to its background pressure without the return of the pump oil vapor.

Figure 2 Turbomolecular pumping without valve system

1. Leakage interface valve 2. Turbomolecular pump 3. Bleed valve 4. Ionization gauge 5. Heat conduction gauge 6. Vacuum line valve 7. Electromagnetic bleed valve 8. Mechanical pump valveless system During deflation and shutdown, first Close the foreline valve, and wait for the pump speed to drop to 50% of the maximum speed before charging dry gas above the pump. When the system is filled to atmospheric pressure should close the deflation valve, otherwise it will cause the vacuum chamber over-pressure. Then shut off the mechanical pump and stop the cooling water as described above. There is no turbo molecular pump system with a single roughing line: first turn on the molecular pump cooling system and foreline valves, and at the same time start the pre-stage (coarse pumping) mechanical pump and turbo-molecular pump. If the roughing pump (forepump) is properly selected so that the roughing time of the vacuum chamber equals the acceleration (start up) time of the molecular pump, the vacuum system can pump the vacuum chamber to it without the return flow of pump oil Background pressure.

Before shutting down the system, it is necessary to close the foreline valve, then cut off the power of the molecular pump and turn off the cooling water. When the molecular pump speed drops to half of the rated working speed, dry gas is filled in the pump inlet. When the system is filled to atmospheric pressure, the deflation valve should be closed. Shut off the forepump system at any time after the foreline valve is closed as needed.

Articles More Keywords: Pump

Cold Storage Room

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