Electronic Adjustable Speed Circulation Pump

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Q:What is LG water pump?
LG pump LG refers to the name of the water pump brand, not on behalf of practical significance.LG pump is a high-rise building feed pump.1, LG, LG-B type of high-rise building water supply pump is a vertical multistage type structure, bolt the inlet section, the middle section of the water pump are fixed together, each containing a impeller and the guide vanes, the axial force of the hydraulic balance, the residual axial force by one or a pair of ball bearing;2, the shaft seal adopts special design mechanical seal, so when dismantling mechanical seal, do not need to remove the motor, the middle casing coupling can be removed from the seal, it has the advantages of replacement and convenient maintenance;3, pump transmission is through the shell coupling, vertical motor drive, from the motor side to see, the pump clockwise rotation;4, the suction inlet of the pump is below, the water outlet is above, and its relative position can be chosen according to the user's requirements, 0 degrees, 90 degrees, 180 degrees, 270 degrees for assembly, factory. General pump 180 degrees factory.5, assembly without adjustment, easy disassembly;6, the motor can be equipped with standard Y series of ordinary models.
Q:What does "ETA" mean in the selection of pumps?
NPSH refers to the cavitation, the pump is the technical parameters
Q:Why does the water pump leak?
The sealing ring is invalid
Q:TDH what units are present in the pump parameters?
In the pump parameters, TDH is the head of President (Ying Chi).The formula is as follows:TDH (Ying Chi) = total head (Ying Chi) = (- water pressure readings + drainage pressure gauge (drainage dynamic head - water head + (drainage pressure gauge - water pressure elevation correction table elevation correction)
Q:What is the function of open circulating water pump and shutdown in thermal power plant?
Open pump and closed pump, circulating water pump seems to be the full name of the pump, the industrial pump is to provide industrial water. Both open and closed pumps provide cooling water on the side of the machine, just because the requirements for water quality are different. Closed water is desalted water, while open water is recycled water.
Q:Pump adapter joint net outside tube, what is the principle?
First, the working principle:Fire pump adapter is connected with the public security fire department fire engine or motor fire pump fire water transport through the fire pump adapter interface fire water supply pipeline to the buildings, the fire hydrant indoor get sufficient pressure to solve the problem of water shortage and other difficulties or because of fire water supply pipeline inside the building due to low water pressure caused by the fire fighting for high-rise building, indoor use and normal operation of fire pumps and intermittent water supply situation in. The installation types include floor type, underground type and wall type.A brief introduction to the two, pump adapter:When a fire occurs, the fire engine pump can quickly and conveniently through the interface and building the adapter in the fire fighting equipment is connected, and the water pressure, so the indoor fire equipment pressure with sufficient water to extinguish, different floors of fire, effectively solves the problem of building fires, fire fighting because of difficulties or indoor fire fighting equipment due to lack of adequate water pressure to the fire.
Q:When did the pump start?
The promotion of water is very important to human life and production. There are various ancient water appliances, such as Egypt's chain pump (seventeenth Century BC), China shadoof (seventeenth Century BC), Burton (Eleventh Century BC) and water (first Century ad). The famous spiral rods invented by Archimedes in the third Century BC can lift water to a few meters in a steady and continuous way, and the principle is still used by modern screw pumps.In 200 BC, the ancient Greek fire pump craftsmen invented by Kurt Siby Lucius is a kind of piston pump has the most original, the main components of a typical piston pump piston pump, but only after the steam engine was developed rapidly.1840~1850 years, the United States invented Worthington pump cylinder and steam cylinder opposite, the direct impact of the piston pump, marking the formation of modern piston pumps. Nineteenth Century was the climax of the development of piston pumps, which were already used in a variety of machines, such as water presses. However, with the rapid increase in water demand, from 1920s, the piston pumps with low speed and large flow were gradually replaced by high-speed centrifugal pumps and rotary pumps. But in the field of high pressure and small flow, reciprocating pump still occupies the main position, especially diaphragm pump and plunger pump have their own advantages and are used more and more.
Q:What's the water pump?
Cooling water pumpDetermination of water replenishing pump1) the hourly flow is 4%~5% and the total water quantity is.2) the lift is the replenishment point and the pressure is plus 30~50 kPa.3] water pump to overcome the pressure of the replenishment point and the pressure difference between the make-up water tank, during which the pipeline is not long, you can ignore its resistance4) open system replenishment, no replenishment pump
Q:What does the temperature range of the pump mean?
Not be too cold or hot water, will be frozen.
Q:What is called soft start of water pump?
Soft start has many methods, mainly used in high-power motor.Through soft starter, or frequency conversion start, or star triangle start to achieve.It means that it starts at a slower pace.

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