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A submersible pump is a unit combining a pump and a motor to an enclosed unit, suitable for submerged installation. There are two types of submerged pumps: A submerged pump type with a submersible motor. A submerged pump with a dry motor, which is connected to the pump by a long shaft. These pumps are normally used for supply of fresh water for drinking, irrigation, and various industrial applications. Submersible pump versions The pump comes in both a single-stage and a multi-stage version (the multistage version being the most common one). The submersible pump may be connected to a riser pipes with a non-return valve, or it can also be installed connected with a flexible hose or other arrangements. The pumps are specially designed to be submerged in a liquid and are often fitted with a submersible motor which is hermetically sealed. Motor and pump are connected with a coupling, from the pump shaft to the motor shaft. Power to the motor is fed through one or more flexible watertight cable.

for many reasons we need miniature things for special works, like bigger pumps there are Micropumps. This article tells what is a Micropump. Micropump has official standard description, a micro pump is a pump which has reduced dimensions and also has specifically a microsystem, preferably similar flow rates as the classic pumps. However, in real world, not always the definitions are maintained. What is a Micropump : The Technology As driving system, the pump will have characteristic microfluidics system. The trend towards microsystems is primarily due for by the market requirements. There are a wide range of technical realizations of micropumps. Often macro pumping principles are transferred into the microworld. Oscillating membranes, for example, are often used in micropumps. A peristaltic systems are an imitation of nature. Especially for non-mechanical pumps to large advantages by miniaturization. Here they are partially working with electric or magnetic fields. Due to the small geometries very high electric and magnetic field strengths can be achieved. The effect – electrokinetic, electro-hydrodynamic, electrohydrodynamic magnetic, electrochemical, etc. – is many times more effective than in the macro world. The selection of the micr-pump types is highly dependent on the requirements and to the fluid or gas or its physical and chemical properties. The flow rate and the pump pressure, and the recoverable media vary greatly in the different micropumps. Thus pumping rates can be a few picoliters to several milliliters per minute. Currently available systems on the market are built with different technologies and different modes of operation. What is a Micropump and How We Use Them (micro water pump, aquarium water pump,micro air pump) Lesser accuracy of throw of fluid will cost the micro pumps lesser. Even at $3 per unit, one can get a Micropump. There are lot of different types of micropumps like dosing pumps. The pumps typically used in aquarium might not be technically micropump but many of them can actually be used with a controller board like Arduino. There are micropumps used for CPU cooling, medical drug delivery etc.

Now there are a variety of micro-pumps, micro-circulating pump, micro-pump, high-pressure micro-pumps, liquid sampling pump, small pump, self-suction pumps, DC pumps, diaphragm pumps, how to choose their own pumps? Mainly from the following aspects to discuss: First, only need to pump or solution, requires self-priming capability, and the flow and output pressure requirements. Note: The pumping of the working medium is water, non-oily liquid solution (can not contain solid particles, etc.), self-priming function, you can choose the following pumps: (About 1 ~ 3 kg), mainly used for water circulation, water sampling, lifting, etc., requiring low noise, long life, high self-absorption. Cheng, etc., the optional BSP, CSP series; 2, the flow rate is not high (about 1 to 5 liters / minute), but the pressure is large (about 2 to 11 kg), mainly for spray, booster, high head, you can choose ASP, HSP series; 3, the required volume as small as possible, flow requirements of small (about 0.1 to 3 l / min), optional QSP series. Second, the need for pumping or gas, value the volume, noise, continuous use and other properties 24 hours continuous operation; volume is particularly small, low noise, but the flow, the pressure is not high requirements. The water can be dry, long-term dry, do not damage the pump; 1, with a micro-pump pumping or vacuum, but sometimes there will be liquid water into the pump chamber. 2, requires both micro-pump pumping and pumping. 3, with a micro-pump pumping, but sometimes there is no water pump can pump, in the "dry" state. Some traditional pumps fear "dry run", "dry run" or even damage the pump. The QSP series of products is essentially a composite function pump, which integrates the function of the vacuum pump and pump, it was called "vacuum pump." Therefore, in the absence of water, it will vacuum, water, when it pumped. Whether pumping state or pumping state, belong to the normal scope of work, it does not matter "dry turn" injury. 4, the main pump with a micro-pump, but do not want to rely on artificial before adding water "diversion" (some pumps in the work before the need to manually add some "diversion", so the pump can pump up the low water, or pump Pumping or even damaged), that is, hope to pump a "self-priming" function. At this time the advantages of PHW series products is that there is no exposure to water, it is vacuum, the formation of vacuum pressure after the pressure up, and then began pumping. Keywords:micro-pumps, micro-circulating water pumps, micro diaphragm pump, high-pressure micro air pump,micro vacuum pump

The uses of a Micro Water Pumps water pumps (Water pumping) The pumping of water is a basic and practical technique, far more practical than scooping it up with one`s hands or lifting it in a hand-held bucket. (water pump) the pump in the cooling system of an automobile that cause the water to circulate A pump is a device used to move fluids, such as liquids or slurries. micro Small-scale extremely small in scale or scope or capability See also Micro Cars Extremely small

Diaphragm Pumps are used extensively in many industries and can handle a very wide variety of liquids. Diaphragm Pumps are in the category of "positive displacement" pumps because their flowrates do not vary much with the discharge "head" (or pressure) the pump is working against (for a given pump speed). Diaphragm Pumps can transfer liquids with low, medium or high viscosities and also liquids with a large solids content. They can also handle many aggressive chemicals such as acids because they can be constructed with a wide variety of body materials and diaphragms. Small Air-Operated Diaphragm Pumps These pumps typically have 3/8", 1/2" or 3/4" inlet and outlet ports and flowrates of 2 to 10 GPM. Small Motor Driven Diaphragm Pumps (12, 24 or 115 Volt) These diaphragm pumps usually have 3/8", 1/2" or 3/4" inlet and outlet ports and flowrates from 1 to 7 GPM. They typically develop pressures to 60 PSI and even 100 PSI in some cases. These small, motor-driven diaphragm pumps are made in two distinct styles. The first is the "Demand" Style which includes a built-in pressure switch to automatically stop and start the pump at specific pressure settings; this style is the most popular. The other one is the "By-Pass" Style where the pump continues to run regardless of pressure in the system but internally bypasses flow if the discharge valve is closed. However, if the discharge valve is closed for more than a minute or two, overheating of the liquid can occur and damage the pump internals.

Reciprocating Pumps Most hand pumps used to inflate bike tires are reciprocating pumps. They have a piston inside and two one-way valves: one going to the bike tire and one to the outside air. When the pump is pulled up, the pressure inside decreases. This pulls in air from the outside but closes the valve to the bike tire. When the piston is pushed down again, it compresses the air inside. This closes the inlet valve and opens the valve to the tire, pushing air into the bike. Diaphragm Pumps Diaphragm pumps are closely related to reciprocating pumps. Instead of pistons, however, they have flexible diaphragms. When an external force is applied, the diaphragms compress, forcing air into whatever it is being pumped into. When the force is removed, the springy diaphragm expands again, drawing more air in from outside. Foot-operated pumps used to inflate rubber rafts are diaphragm pumps. Double-Acting Pumps Reciprocating pumps take a lot of motion to operate. To pump one cylinder full of gas, the user has to pull the plunger up and down. Double-acting pumps work more efficiently by using two or more cylinders. When the plunger is pushed down on a double-acting pump, it compresses one cylinder, pushing air out. At the same time, the other cylinder is pulled open, drawing in air from the outside. When the plunger is pulled back up, the open cylinder is compressed and the compressed cylinder is pulled up.

Transfer Pumps and How They Work Also called kinetic pumps, these types of pumps create momentum, through a piston or propeller-like device pushing the gas around the inner parts of the pump, continuously flowing from the inlet to the outlet of the pump. The piston or other moving part of the pump accelerates the gas and air molecules, creating an area of low pressure. The gas and air molecules begin moving away from the low-pressure region and escape through the outlet valve of the pump. When the desired amount has been removed from the vacuumed chamber, a closure valve is put into place to prevent the molecules from being pulled back into the container from the pump. Trapping Pumps and How They Work To perform more effectively, trapping pumps, also known as capture pumps, are usually placed inside the container that is being vacuumed. These types of pumps work using chemical reactions; for example, some trapping pumps operate by removing the condensation or thin film created by the molecules in the air when they chemically react to the internal surfaces of the pump. The Physics of a Vacuum The basic information you need to know to understand how vacuums work is how the low pressure regions power the vacuum system. Molecules in the air do not like the areas of low pressure and rush to immediately escape to higher-pressure areas. Tornadoes are excellent examples of natural vacuums, creating such a chaos as air and gas molecules rapidly search for areas of higher pressure. Practical Applications Transfer pumps are the most common vacuum pumps used in day-to-day applications. Vacuum sealing pumps for food storage bags are small transfer pumps that suck the air out of the storage bags. Other Vacuum Pumps Other pumps designed to vacuum out air may also be powered by a squeezable bulb--resembling the hand pump on a blood pressure cuff---that works to pull air from the container. Vacuum Power Vacuum power is used not only to create airtight storage space like training facilities, or experimentation, but is also used to remove fat and abnormalities from the inner human body, pimples and blackheads from the skin, and even to combat erectile dysfunction problems.

Freeze Drying Process Vacuum pumps are commonly used during the process of freeze drying materials such as perishable foods. During the freeze drying process, pressure is added to frozen foods using a vacuum pump and heat. This causes the frozen water in the food to skip the liquid phase and go directly from a solid to a gas. Freeze drying is commonly used to preserve perishable items over long periods of time, such as during shipping and storage. Medical Applications Vacuum pumps are regularly used in medical processes where suction is required. They are also used in medical applications such as Radiotherapy and Radiosurgery. Coating Processes Vacuum pumps are used in the coating of certain items, including vacuum coating for decoration and glass coating. Vacuum coating is a mechanized procedure used to apply coatings to certain materials in which a material is conveyed through a coater, or application changer, at a fast, constant speed. Hard vacuum coating is used for engines in Formula 1 cars. Depending on the type, vacuum coating can be used for decoration, durability or even energy saving measures. Air Conditioning Service Vacuum pumps are used to remove contaminants from AC systems before they are charged with refrigerant. Flight Instruments Most aircraft use vacuum pumps to drive certain flight instruments. Flight instruments can be divided into pressure measuring and gyroscopic instruments. The gyroscopic instruments are the type that can be vacuum pump driven.