What are the main factors to consider when selecting a pump?
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In addition to considering lift, flow rate, and anti-corrosion, what other factors should be considered when selecting a pump?
Also consider the medium (density, state) and required inlet and outlet pressure difference.
Density, temperature, location, whether the motor needs to be explosion-proof, and the type of pump!
There are also medium characteristics: Corrosive, abrasive, toxic ； operating status: continuous, discontinuous ； Solid content, particle size ； Inlet pressure, outlet pressure, saturated vapor pressure ； Rated pressure difference, required head, NPSHa>NPSHr Installation location: indoors or outdoors, with or without a ceiling, heating or not ； explosion area: Zone xx level xx group; material requirements for current-carrying parts ； Whether frequency conversion is required.
Another point to add is the control method of the pump. Is it manual or external?
The viscosity of the material being transported has a great relationship!
This post was last edited by jhzy on 2009-10-14 17:25 The selection of pumps should consider the applicable fluid (medium viscosity, corrosiveness, etc.), temperature, head, suction head, flow, waterproofing, explosion-proof, power supply, speed regulation requirements (frequency conversion), monitoring method (local or remote, etc.).
1. The state of the material determines whether to choose a closed impeller or an open impeller, etc. 2. The structure should be as simple as possible and the maintenance should be as convenient as possible. 3. Installation position. If the installation position is high, try to use a low-power motor. 4. The process requirements, lift, flow rate, pressure, etc. should be well understood. 5. Economical, don’t choose expensive ones, only choose reasonable ones. 6. Take the maintenance of the motor into consideration and choose Y2 motor as much as possible (to facilitate the addition of grease).
If it is a slurry or has suspended particles, a mortar pump should be used. If a high head is required, a multi-stage pump is required. When used on a pipeline, a pipeline pump is required. If the suction range is required, a self-priming pump is used. A submersible pump is used to absorb liquid from an underground tank. A magnetic pump or canned pump is used to prevent leakage. Select the pump material according to the corrosiveness of the medium.
Material properties, whether the motor is explosion-proof, application location, etc.
Others include the nature of the medium and the type of pump it is suitable for. Centrifugal pumps are generally preferred. The power of the pump's matching motor is converted according to the density of the medium. For pumps with low-level and easily vaporized media, attention should be paid to the cavitation margin, the explosion-proof level and insulation level of the pump's matching motor. For pumps, alarms or process interlocks must also be considered.