What should be considered when choosing self-priming pumps for the petrochemical industry?
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This post was last edited by Zhongyuanren on 2016-11-27 05:58. Gentlemen, please share your insights on what should be considered when choosing self-priming pumps in the petrochemical industry Consider it from several aspects? Thank you!
Are you taking a break over the weekend or not? . . . Getting up so early
For oily waste and oily wastewater, submersible pumps are generally used. However, in such systems, these pumps require priming when the liquid level drops and then rises again; moreover, the outlet valve cannot be opened fully, which easily leads to overcurrent
This post was last edited by Zhongyuanren on 2016-11-27 21:32. Thank you. Please provide further guidance on aspects such as recommendations from self-priming pump manufacturers, model selection, and power selection. Please
Do not recommend this manufacturer! For self-priming pumps, the self-priming height must be considered first ； There are several factors to consider regarding the self-priming height: 1. Inlet pressure (whether it’s an open tank or a pressurized tank). 2. Medium temperature and vaporization pressure (the temperature shouldn’t be too high; in some accident tanks with temperatures over 200 degrees, priming isn’t possible at all). 3. The self-priming height that manufacturers can achieve is generally only around 6–7 meters; anything higher is purely unrealistic. So when designing, don’t set the value too high, otherwise you’ll face problems with priming ； 4. Keep the inlet pipeline of the self-priming pump as short as possible to reduce pipe resistance ； Next is to consider the insulation of the self-priming pump, as once it has been filled for the first time, no further attention is needed. If the medium remains inside the pump and freezes, the pump won’t be able to start again next time ； Then it’s time to choose the structure; old-fashioned external and internal mixing types, as well as the large teapot style, should be avoided ； Ultimately, it depends on your standards; in the petrochemical industry, it’s best to follow API or SH standards. If you think national standards or ANSI standards are sufficient as well, that’s fine too (as they are cheaper) ； There are a wide variety of manufacturers of self-priming pumps; I wish you success in finding a good one. If you’re purchasing in large quantities, it’s best to conduct an on-site inspection~
Suction pressure, suction lift height, physical and chemical properties of the medium (corrosivity, density, viscosity, etc.), and selection of pump material.
1. Suction lift； 2. Medium ； 3. Head ； 4. Workplace, environment ； 5. Traffic ； Wait
Medium specific gravity, chemical and physical properties of the material, self-priming height, etc.
Submersible pumps are increasingly used less for handling oily wastewater and sewage; they are mostly replaced by forced suction pumps equipped with self-priming functions.