Submersible Sewage Pump WQ Series

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Product Description:

<1>Electrical motor:

High-performance water-resisting squirrel-cage-type motor, Class H stator winding (≤180°C) and longer service life. IP68 protecting class, inserting heat sensor for each phase of stator winding. Direct starting for 3 kW or 3 kW below, ?starting, reduced voltage starting or soft starting for 4kW or 4 kW above.      
Electrical motor also applies to other voltage and frequency.
Fire proof motor conforming to international standard and applying to dangerous occasion is optional, for example dIIBT4etc.

<2>Shaft bearing :
Service free upper/lower shaft bearing is designed as 50000 hours service life, and assembly of temperature probe according to requirement is allowable.

<3>Cooling system:
Cooling system is divided into open-type circulation and cooling system and close-type circulation and cooling system, which ensures normal operation of motor below/above level surface.
Open-type circulation and cooling system: Pumps parts of liquid and circulates it from back side of impeller to clearance between tube cooler and casing to remove heat generated by motor, provided with excellent flow property and performance avoiding blockage  Close-type circulation and cooling system: Eliminate heat with build-in rotating wheel, which is provided with performance of blockage-less and service-less.

Separate motor and pump with two layers of mechanical seal, which provides motor with diplex protection.Mechanical seal material at side of pump adopts tungsten carbide/tungsten carbide and it at side of motor adopts graphitetungsten carbide. Special device and spiral seal groove at backside of impeller provide the unit with long-period and Effective protection without enwinding.

<5>Shaft :
The unit adopts coaxial and shorter-overhang design, which depresses interference of shaft, reduces vibration, depresses noise and prolongs service life of mechanical seal and shaft bearing.

Adopts CFD optimizing design, which transports liquid in perfect flow, speed and maximal efficiency without blockage. User could select impeller model as eddy flow, single channel, duel channel, or multi-impeller according to difference of
pumped medium.

<7>Cable seal:
Separated sealing connection box. Adopt waterproofing and sealing cable,  and  provide  inlet wire with  anti-tension  and anti-wind protection.

<8>Monitoring system:
Equip each phase of motor with temperature sensor that sends out alarm signal ands shut down power supply automatically if motor suffers from overheat.
Optionally equip upper/lower shaft bearing (s) with temperature sensor that sends out alarm signal ands shut down power supply automatically if motor suffers from overheat.Sealing monitoring device is used for monitoring if water immerges into oil chamber from shaft seal. In addition, there is set with individual sensor in motor chamber and connection chamber of motor of 30kW above, which should perform early warning if leakage occurred.

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Q:What's the difference between a double suction pump and a single suction pump?
From the literal sense to understand, double suction pump is the impeller at both ends of the water inlet, and the single suction pump is from the impeller at one end of the water.Dual suction is mainly used in the process of large flow and low lift. When the pump flow is greater than or equal to 280m3/h, the caliber of 200mm or more, if the use of a single suction pump, then the speed requirements of about 1450rpm in order to achieve the suction requirements. However, if the double suction pump is used, the size and weight of the pump are reduced, and the speed can be increased, the volumetric efficiency is increased, and the reliability of the equipment is improved.Single suction pump, also known as end suction pump, single suction pump flow is relatively small. The same flow, single suction of small size, but the axial force, bearing a large burden. The cost of single suction pump is low, the price is reasonable, widely used, but in many ways it is not as good as double suction pump. If the inlet pressure is higher, the general choice of double suction wheel can be solved. Because the axial force balance of the impeller of the single suction pump is a big problem.
Q:Why does the water pump leak?
The sealing ring is invalid
Q:How to connect the household pump capacitor?
1) in a line in the AC220V string into a large light bulb (Bai Chideng), and then the capacitor as shown in figure A, then, that B and C are three terminals; 2) the number of pump motor three lines 1, 2 and 3; 3) A, B, C and 1 2, 3, a total of six kinds of wiring combination: ABC/123, ABC/ 231, ABC/321, ABC213, ABC132 ABC312; 4) you have a a try, if you can turn up, and the fastest start wiring is correct, 5) if not turn up, you have to increase the number of watt bulb, such as 200 watts, 300 watts, 500 watts...... With a few 100 watt parallel one; 6) string into the bulb is designed to prevent the current is too large, it certainly must be removed after determining the connection method; 7) there is no suitable bulb that according to the motor power generation to choose the appropriate insurance.
Q:What kind of water pump does the 5.5KW motor have?
Model has: QS-250-40-21, lift 21m, flow 40 square, motor power is 4KW, water pump diameter is 232cmQJ-200-40-26, lift 26m, flow 40 square, motor power is 5.5KW, water pump diameter is 189cmYou can choose the right pump according to your well path.
Q:Why should we pump water into a pump when the country uses a pump to pump it?
Because it is not a self-priming pump, so add water, otherwise there is no pressure can not afford
Q:What will the water pump reversal situation?
The same will reverse pump water, but the head and the pressure greatly reduced, I just finished debugging a pumping station, Stephen multi-stage pump, installation of equipment: multistage water pump motor power 4 75KW 76% head 100 meters, frequency control, motor nameplate nominal current of 143. According to the direction of the motor steering pump mark OK set the start time of 28 seconds after 5HZ boot head start frequency can reach 50 meters (at that time did not install the pressure gauge cannot observe the water pressure of current) in early 118 about 3-5 minutes after the current is reduced to about 97, there are inspection found no problems, suspected pump problems, suspected foot valve not completely open, the reason cannot exclude the end of valve, almost in despair when the thought is not marked in the direction of the pump, re set to restart the current 129.5A to observe that later installed capacity reached 0.55MPa duct pressure gauge head close to the design requirements, the problem on the manufacturer's mark is reverse.
Q:Think of several households sharing a pump
Each contactor is connected with each power source in the main circuit, and the lower port is connected to the water pump;Control loop, only draw the wiring diagram of A households, households in other similar first power through the control switch in series contactor several other a normally closed contact and then enter the M contactor coil;In water, leading to various water pipes connected with the electromagnetic valve, and the solenoid valve are connected in series and the two contactor normally open contact is connected to the power supply;As long as one of the closed control switch, the pump will run at the same time, using his own power, and this is the other an open pump closed control switch of their own, will not work, the water will not go into his house, the family will not run electricity; only when the first home after closing the control switch second, if still closed control switch, water and electricity will automatically turn to him.Not understood, of course, that there is one drawback, if one is using a pump, a few other can not be used to solve the problems, it is not difficult, is that every installation of a water tank or like a floor, said each install a pressure tank on it
Q:What are the conditions for the series and parallel connection of the pumps?
1, pump series, the two pumps must start and stop at the same time in order to normal operation.2 when the pump is connected in parallel, the two pumps must be equipped with check valve at the same time to operate normally.3, of course, in the election of the pump, should meet the requirements of upstairs said.
Q:The flow of the pump will be reduced, the speed will change, the power of the motor will change?
To be sure, the flow rate decreases and the speed decreases! The change of power depends on the change of the lift! If the flow rate decreases and the head rises, the power is likely to remain unchanged!
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?
The star delta circuit you give belongs to the international standard starting mode, different from the old gb. The first said (the old national standard, is actually the domestic elders step-down manner, they are the main contactor) after shunt implementation of star triangle, so there will be a larger contactor, down economic calculation.And the new international standard (you give the circuit diagram) can be seen that the air switch to select the motor current to meet the given amount of surplus, 90kw motor rated current 175A, so choose 225A air switch can be. 1KM 2KM is the main operation of contactors, contactor, they each pay half the current line in triangle, so choose 110A (like never seen 100A) current, 3KM star, because of short-time current will not cause damage to the contact, a little lower 80A is not affected. Heat meter: if you don't use a transformer, you can choose JR36---160A.Some friends may feel small, in fact as long as you pay attention, you will find a lot of electrical equipment factory are doing this standard. In this way, both cost savings and service requirements are met.

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