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Comparison of sliding vane pump and Nord pump

Release time:

2024-07

1, due to the use of non-contact gap seal, while the rotor and the pump wall does not contact, only 1-2 wire (0.01 ~ 0.02mm) gap, less wear, and no impact on performance. 2. In gas-liquid mixed transportation such as multi-crane position trestle bay sweeping operation, the gas-liquid mixture can be directly sent to a tank within 160m high without setting up another emptying tank.

slide pump

1, the sliding plate and the cylinder contact friction seal, the relative wear of the sliding plate and the cylinder can not be avoided, and in the gas-liquid mixing pumping is especially obvious, seriously affecting the life.
2. During gas-liquid mixing, the relative friction between the sliding vane and the cylinder causes the higher the gas-liquid ratio, the more severe the wear, and the pressure cannot meet the set requirements. Self-priming is low, and another emptying tank is required.
3. It is difficult to adjust the flow rate and NPSH parameters. The suction performance of viscous medium, gasoline and gas-liquid mixed medium changes greatly, and it cannot be operated for a long time.
4. The sliding vane pump has high requirements for the medium. If the medium contains particulate impurities, a filter must be installed. Compared with Nord pump, sliding vane pump capacity: product efficiency, mechanical efficiency is much lower, high energy consumption.
5. The outlet static pressure shall not be higher than 0.6MPa, otherwise it will seriously affect the suction performance and cannot meet the continuous work or even work under harsh working conditions.
6. The axial clearance of the sliding vane pump is generally above 0.1mm, and the clearance is large, so compared with the Nord pump, the self-priming capacity is poor, the efficiency is low, and the structure is loose, the volume is large, and the installation space is increased.




 

NORD pump

1, due to the use of non-contact gap seal, while the rotor and the pump wall does not contact, only 1-2 wire (0.01 ~ 0.02mm) gap, less wear, and no impact on performance.

2. In gas-liquid mixed transportation such as multi-crane position trestle bay sweeping operation, the gas-liquid mixture can be directly sent to a tank within 160m high without setting up another emptying tank.

3, only need to adjust the speed to change the pump flow and cavitation margin and other parameters, without affecting the pump suction performance, especially for viscous medium, gas-liquid mixed medium suction performance changes little.

4. Strong impurity passing ability, within a certain diameter range, the influence of medium particles on the performance of the pump is very limited, no filter is needed, and there will be no vicious accidents such as stuck.

5, the outlet static pressure can be up to 2.5MPa, or even higher, and the increase in pressure does not affect the self-priming capacity of the pump, and can work continuously under harsh working conditions for a long time.

6. The gap between the rotor and the pump body is the smallest in all the positive displacement pumps that rely on the gap seal. Therefore, it is currently the pump with the strongest self-priming ability, with compact structure, small size and easy installation.

 

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