Household Self-priming JET-L&JET-B Pump

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Household Self-priming JET-L&JET-B  Pump

The JET-L&JET-B series pumps are with an automatic ejector system, find many uses in domestic applications, gardens and supply water from wells, and so on. These pumps suitable for civil and industrial uses to pump clean water and chemically non- agressived loquid. They are very reliable, safe and sample to use.

Pump body:Cast Iron

Impeller:brasss (Noryl, if requied)

Motor:Closed, Externally ventilated

Insulation class:B(Class F if required)

Protection class: IP44/IP55

Duty:Continuously rated

Mechanical seal:Φ12 ceramic steatite/graphite

Shaft:Carbon steel AISI 1045(Stainless steel AISI 420 if requied)

The normal power standard is 220v,50HZ,single phase

Three phase 220v/380v, 50HZ, 220V/460V, 60HZ

Single phase 230V, 240V, 127V,110V,115V/ 60HZ




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Q:Two pumps automatically switch start control circuit,
The puddle is full, the float switch is closed, and the relay J1 works to drive the first motor. The J1's work makes the intermediate relay 'J' work and locks itself, preparing for the work of the second machines. The water level is lowered to the required minimum position, the ball is broken, the motor is stopped and the motor is stopped. When the water level rose to the highest position again, the floating ball closed again, the relay J2 and self-locking relay J2 to drive second motors, instant intermediate relay are opened, when the water level again be reduced to the lowest position, float off, the motor stops working, stop by working in front of the intermediate relay. The whole circuit back to the original state. So that the two motors work alternately.It should be noted that the circuit diagram for simple to understand, only painted the control circuit, there is no main circuit, there is no missing phase, leakage, over-current and other protection, the actual installation needs to be installed. There is the role of time relay is to ensure that the relay J2 normal work, the intermediate relay is disconnected, so that the motor 2 does not occur wrong action, time relay can be set to a few seconds, or even less than a second. Intermediate relay can also be controlled by time relay, and its time is also set very small, so as to avoid J2 short time possible power supply.
Q:What does the pump lift mean?
The pump head is the parameter you must know when you buy a pump, that is, the height of the pump.To buy a pump, I think the Heathrow pump is OK. I bought it earlier this year. It's not bad yet, but the quality is pretty good.
Q:Horizontal pumps, vertical pumps, which kind of expensive?
Relatively speaking, the horizontal is expensive, because there is a horizontal chassis, if there is a large pump case, the best selection of horizontal, otherwise the weight of the motor to the pump body smashed!
Q:Why does the GB/T3216 specify the pump performance tolerance as positive and negative?
Tolerance coefficient is due in the manufacturing process, will, so each pump products are possible shapes and sizes do not conform to the pattern of the situation, and ensure the test results in the value (operating point) when compared, should be allowed to have a certain tolerance. It should be noted that these tolerances are only relevant to the actual pump and do not involve test conditions and measurement uncertainties. If the pump at a certain working point (the same lift) standard (Design) flow of 20m3/h, the actual flow of 22m3/h, indicating that the pump in the design process has unreasonable place, resulting in waste of power. Deviations from the manufacturing process usually have no positive deviation.A pump is a machine that transports liquids or pumps liquids. It will be the prime mover of the mechanical energy or other external energy transfer to the liquid, the liquid energy increase, mainly used to transport liquids including water, oil, alkali liquid, emulsion, suspension emulsion and liquid metal, but also transport liquid, gas mixtures and liquids containing suspended solids. Pump performance of technical parameters are flow, suction, lift, shaft power, water power, efficiency, etc.; according to the different principles of work can be divided into volume pumps, vane pumps and other types. Displacement pump is to use its studio volume changes to transfer energy; vane pump is to use the rotating blade and water interaction to transfer energy, there are centrifugal pumps, axial flow pumps and mixed flow pumps and other types.
Q:90kw pump star delta start, in the end to use the circuit breaker, AC contactor (Star contactor, angle contactor), what kind of thermal relay?
Imports, such as Schneider, press: plastic case press 250A, contactor select 115 of 2, 95 of 1 can.Domestic recommendations: Press: plastic case press 250A, contactor 160, 2, 115 of the 1 can.
Q:The diving pump in the aquarium stops and stops on the goldfish
Submersible pump is used as if you push the pump filtration should be open for 24 hours, so the water circulation process, continuously into the fresh air to increase the oxygen content of water bodies two, filter on the filter of the continuous cleaning system to maintain water make nitrification safe and clean, the water can be fully introduced the content of nitrification ammonia water, let the fish live healthy and strong resistance, good activity, three appropriate water flow on the long time to keep fish, turn off and the formation of water to fish is always in a state of tension and decreased immunity antifeedant or death. Four, frequently start the pump, easy to cause damage to the motor coil, reduce pump life, so according to the above, if you are using submersible pump as a filter to promote, I suggest you open 24 hours.
Q:When using a frequency converter to adjust the pump, what is the relationship between the change of the speed and the efficiency of the pump?
The wind pumps such load is usually called square torque load, which is in a certain range of speed and torque is roughly proportional to the square of the speed of N, TL=kn^2, power and speed is proportional to the cube, the energy-saving effect is obvious.
Q:How many pumps does a 50 meter water head use?
Considering the pipe resistance and the water head, it is recommended to use the pump at 65 meters or so!
Q:How to determine the pump installation elevation, why should we determine the pump installation elevation?
Water pump installation elevation should be in accordance with the water pump suction head, taking into account the water level of water intake and fall. The minimum water level at the water intake point must be less than the suction head of the water pump, otherwise the water intake will not be enough.
Q:The efficiency of water pump frequency conversion is very low, why?
Pump power frequency operation, speed is rated. Frequency conversion actually adjusts the speed of the pump (the speed becomes smaller), and the flow of the pump moves parallel and downward. As for efficiency, it depends on the operating conditions of the pump. Does it deviate or run to the minimum efficiency position of the flow curve of the pump?.

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