Chemical equipment requirements for corrosion resistant chemical centrifugal pump selection

Device a variety of chemical factory, chemical plant, generally exists in a special condition, such as used in the corrosive medium environment, volatile, there is also an important part of the equipment, that is corrosion resistant chemical centrifugal pump, since it is such a special circumstance, corrosion-resistant centrifugal pump must also have special requirements, now introduce chemical plant eight requirements for corrosion resistant chemical centrifugal pump.

       （ 1) Must satisfy the capacity and head, pressure, temperature, process parameters such as NPSH requirements.

       （ 2) Must meet the requirements of dielectric properties:

(1) for conveying inflammable, explosive, toxic or precious medium water pump, shaft sealing is reliable or the leak-off chemical centrifugal pump, etc.

2) of the pump for the transmission of corrosive media, the required flow components with corrosion resistant materials.

(3) for conveying pump containing solid medium, the required flow components adopt wear-resisting material, shaft seal should use clean liquid washing when necessary.

       （ 3) Must meet the installation requirements:

(1) the use of pump installed in the presence of corrosive gas, atmospheric corrosion prevention measures.

(2) the temperature is below - the installed in the outdoor environment Below 20 c pump, to consider pump cold short phenomenon, low temperature resistant materials.

(3) the pump installed in the blast area. Should be used according to the explosion regional levels, explosion-proof motor.

       （ 4) Factory for annual overhaul, corrosion-resistant chemical centrifugal pump generally should not be less than 8000 hours of continuous operation cycle. To adapt to the requirement of 3 years a major overhaul, APl610 ( Version 8) Oil, heavy chemical and industrial gas water pump cycle for at least 3 years in a row.

       （ 5) The design life of the pump at least for 10 years in general. APl610（ Version 8) Oil, chemical, and gas industry with the design of centrifugal pump life.

       （ 6) design, fabrication, inspection should comply with the relevant standards, norms, and common standards and norms to see the table below:

7) factory should guarantee the corrosion resistant chemical centrifugal pump in the power supply voltage, the performance of the frequency range. The extent of the change of the power supply voltage and frequency as follows: the voltage - 380 v±10%, 6000 v + 5%, - 7%, frequency - 50Hz±0. 5％

       （ 8) To determine the pump model and manufacturing plants, comprehensive considering the performance of the pump, power consumption, reliability, price, and manufacturing specifications and other factors.

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