Influence of temperature on selection of rotary lobe pump
2022-11-18 17:48:06
Read:
Share:
The temperature will affect the pump in the following ways: 1. Impact on structural materials:
if some chemicals are pumped, there may be erosion according to the change of temperature. A hot liquid is more corrosive to the material than a liquid at a lower temperature. Therefore, it is important to check chemical compatibility at pumping temperatures. Extremely low temperatures (e.g. -150oC and below) will make many materials brittle, such as standard carbon steel. Therefore, such as stainless steel rotary lobe pump to transfer other low temperature liquid must use special component materials. By adding elements or calcining metals with some crystalline structure, parts can be made that can withstand these extreme conditions. 2. Components of the pump: For rotary seals, as the temperature rises, heat is transferred from the seal packing gland to the bearing according to the shaft. This will lead to a significant reduction in the bearing life, and may even cause the bearing to stick. 3. Liquid viscosity: Liquids that are subject to temperature change viscosity during pumping. Honey, for example, becomes thinner when heated, changing the way it is pumped. Therefore, understanding the effect of temperature transition on product viscosity during pumping will ensure the selection of the correct pump (type structure).
4. Expansion of parts: At high temperatures, metal parts expand at different rates. In the selection of the pump, this is especially important, and will be your choice of structural materials. 5. Keep warm or maintain low temperature: Under some conditions, the use of high viscosity rotary lobe pumps may require the maintenance of a certain temperature. This can be achieved by maintaining flow standards or by using thermos/general thermos.
