Low cavitation

CFD flow field vortex and cavitation conditions are used to predict and analyze, and multiple comprehensive cavitation performance test statistics are summarized to ensure that the low NPSHr value meets the requirements of all working conditions.

Small vibration

Reasonable design, precise processing technology and perfect quality control ensure smooth and reliable operation and increased parts life.

Easy to maintain

Humane ergonomics design, simple structure, convenient installation and maintenance, saving maintenance money and time.

Shaft seal is good

The design combination and installation scheme of the shaft seal are flexible and diverse, and the friction power consumption is small.

Multiple specifications

Provides guarantee for selecting the correct and efficient water pump and pump system best solution.

• Cooling water circulation of air conditioning and refrigeration system.
• High-rise (super high-rise) buildings or residential areas heating hot water circulation.
• Heating boiler or heat exchanger water circulation.
• Transportation of organic heat exchange media.
• Closed loop system water circulation for production processes such as textiles, sugar refining, chemicals, brewing, thermal stations, and waste heat utilization.

The pump body has a shaft-opening front and rear door structure, which is very convenient for inspection and maintenance. To replace the impeller and sealing ring, you only need to remove the right pump cover, leaving the pipe and motor alone.

The excellent hydraulic model under CAD-optimized design has high efficiency, reliable performance, and wide applicable coverage, ensuring that the system works in the high-efficiency area of the pump, saving energy.

Use famous brand bearings and high-grade grease. It is resistant to high temperature and high pressure and does not require cooling water, ensuring long-lasting use and saving maintenance and management costs.

Foreign special mechanical seals have a long service life, no leakage, less maintenance, and a clean environment. The continuous running time greatly exceeds that of similar domestic products.

Excellent materials and special design enable the pump body to withstand a static pressure of 1.6MPa(G), and can reach 2.0MPa(G) for special needs. It has a very wide range of applications.

The novel design makes the pump compact in structure, with short bearing support distance and good bearing rigidity. Low noise and small vibration of the pump.

Increase the design of the bearings, improve the bearing safety factor, and adopt a double-volute design for medium and high-lift pumps. Minimize the axial force of the pump, run more smoothly, have longer bearing life, and lower noise. It solves the current problems of bearings being easily damaged, short service life, and unstable operation of similar domestic products.

The flange mouth of the pump body goes in and out, which facilitates pipeline installation, saves floor space, and reduces pipeline losses. The relative positions of the motor and the inlet and outlet pipelines can be changed according to the user’s site requirements, making the installation very flexible.

All motors are designed with low speed, which greatly reduces the noise and vibration of the unit. It is conducive to the installation and operation of pump units in buildings and living areas.

Speed: 990, 1480r/min

Lift:20-100m

Flow:200-2000m3/h

Temperature range: 0-80℃ (special configuration can reach 105℃)

Import diameter: 200- 500mm

Working pressure: inlet pressure + maximum working pressure ≤ 1.6MPa (G) [special requirements can reach 2.OMPa (G)]

Transmission medium: clean water or other liquids with physical and chemical properties similar to clear water

Working mode: continuous operation

Y (Y2) series fully enclosed self-fan-cooled squirrel-cage three-phase asynchronous motor

Voltage: 380V

Frequency:50Hz

Protection level: IP44 or IP54

Insulation grade: B or F

Installation form: B3

Note: Y2 series motors and Y series motors (below 315KW) have the same installation dimensions if their frame numbers are the same, so the data sheets will not be repeated.

Special motors can be supplied according to user requirements

1. Check that the water pump and motor are not damaged.
2. The vaporization pressure of the liquid is the cavitation allowance NPSHa of the device, and NPSHa should be greater than NPSHr. In the backflow device, the installation height is added.
3. Installation sequence:

(1) Place the water pump unit on the concrete foundation with embedded anchor bolts, correct the level by adjusting the wedge-shaped pads between them, and tighten the anchor bolts appropriately to prevent movement.

(2) Pour concrete between the foundation and the feet of the pump unit.

(3) After the concrete is dry, tighten the anchor bolts and recheck the levelness.

(4) Correct the concentricity of the motor shaft and the water pump shaft so that the two axes are in a straight line. The allowable difference in non-concentricity on the outer circles of the two couplings is 0.1mm, and the allowable difference in unevenness of the end gap along the circumference is 0.3mm. (Check it again after connecting the water inlet pipeline and trial operation. It should still meet the above requirements.)

(5) After jogging to check that the motor’s steering direction is consistent with the direction required by the water pump, install the connecting pin of the coupling.

4. The inlet and outlet pipes should be supported by separate brackets and should not be supported by the pump body.
5. The joint surface between the water pump and the pipeline should ensure good air tightness, especially the water inlet pipeline, which must be strictly air-tight. There should be no possibility of trapping air in the device.
6. In the outlet pipeline of the water pump, it is generally necessary to install a gate valve and a check valve (if the lift is less than 20m, it is not necessary). The check valve is installed behind the gate valve.

1. Start and stop:

(1) Before starting, the rotor of the pump should be rotated lightly and evenly.

(2) Close the water outlet gate valve, open the water inlet gate valve to inject water into the pump, and open the airlock to deflate. You must ensure that the pump is filled with water and no air is trapped.

(3) If the pump is equipped with a vacuum gauge, close the cock connected to the pump and then start the motor. Open it again after the speed is normal; then gradually open the outlet valve. If the flow rate is too large, close the gate valve appropriately for adjustment; On the contrary, if the flow rate is too small, open the gate valve wider.

(4) The mechanical seal allows a small amount of leakage, otherwise it should be repaired.

(5) When stopping the water pump, first close the cock of the vacuum gauge and the gate valve on the water outlet pipe, and then cut off the power supply to the motor. If the temperature of the environment is low, open the square screw plug at the bottom of the pump body. , remove the remaining water to avoid freezing and cracking.

(6) When out of use for a long time, the water pump should be disassembled, the water on the parts should be wiped dry, and anti-rust oil should be applied to the processed surface for safekeeping.

2. Operation:

(1) The maximum temperature of the water pump bearing should not exceed 75°C.

(2) The amount of calcium-based butter used to lubricate the bearing should occupy 1/3 to 1/2 of the space of the bearing body.

(3) When the mechanical seal leaks seriously, it should be repaired. If the friction pair is worn, it can be replaced individually or as a whole set.

(4) Regularly check the elastic coupling components and pay attention to the temperature rise of the motor bearings.

(5) During operation, if noise or other abnormal sounds are found, stop the machine immediately, check the cause, and eliminate it.

(6) The speed of the water pump must not be increased arbitrarily, but it can be used at a reduced speed. For example, the rated speed of this type of pump is n, the flow rate is Q, the shaft power is P, and the reduced speed is n1. After the speed reduction, the flow rate, head, and shaft power are respectively The relationship between Q1, H1 and p1 can be converted by the following formula:

Q1=(n1/n)Q

H1=(n1/n)²H

P1=(n1/n)³P

Recommended spare parts quantity

1. Ordering parameters that must be provided:

△Pump model〈or flow and head parameters. The pump model should include specification code and direction of rotation).

△Inlet pressure (to determine whether to match the return pipe and the material of the pump casing. If the inlet pressure is >0.03MPa(G), there is no need to equip the return pipe; if the working pressure is >1.6MPa(G), the pump casing material must be specially configured).

△Pump rotation direction <If installed in counterclockwise direction. Must be marked, if not marked, delivery will be clockwise).

△ Equipped with a public base <The standard configuration is: when the motor power P<100kW and the inlet diameter DN1≤300, it is equipped with a public base, otherwise it is not equipped, so if P>100kW, DN1>300 requires a public base, it must be specified).

△The standard matching motor is IP44, 380 volt. Y series motor. Users must indicate their special requirements. The installation dimensions table on the following page only lists the installation dimensions of Y series motors. The actual installation dimensions of Yz series motors are exactly the same as those of Y series motors.

△Materials of impeller, shaft and other parts (if not specified, they will be delivered with standard configuration).

△Anchor bolts (not specified. is not worthy).

△Medium temperature (if not specified, delivery will be at room temperature).

2. Selection instructions:

△User ordering is not limited by the parameters listed in this performance curve and technical data table. The parameters listed in the sample are only special typical point parameters for user selection reference. The company can provide products according to the flow and head operating points required by the user’s design.

△If the performance parameters are similar, the standard impeller pump type (M type) is generally preferred.

△If the power of the supporting motor needs to be reduced for individual specifications, it should be calculated and determined based on the user’s required operating point and agreed upon with the technical center.

3. The shaft seal configuration of KQSU double-suction pump adopts mechanical seal configuration without packing seal.
4. If you have special selections beyond the sample content or if you have any questions about the sample content, please consult Shanghai Kaiquan Technology Center directly.