Screw pump can dry run?

Screw pump is a positive displacement rotary pump, which not only delivers lubricious medium, but also can transport a large number of non-lubricative medium, a variety of viscosity (the maximum viscosity up to 3 * 106 mm / sec) Of the medium and corrosive (acid, alkali and other properties), abrasive liquid, combined with the twin-screw pump with dry-run function, so much respected by the market. Then screw pump in the end can dry run, Xiaobian following you announced. Screw pump can dry run? Screw pump in the end can not dry? No, because rubber will fail quickly as the rotor rubs on the dry surface. This seems to contradict the screw pump's good self-filling ability, and in fact the screw pump will be self-filling and operating well after a short period of idling at restart. In these cases, some of the residual fluid remains in the pump, providing limited but sufficient lubrication during pump self-starting, with pump self-starting typically not exceeding 30-60 s. It is dangerous to start the screw pump for the first time or restart after a long period of no-load and should be rotated by hand before starting; otherwise, the screw pump dry-run can cause the rubber to fail quickly under such extremely dry conditions. For this reason, it is recommended that the inlet of any type of pump be filled (the liquid level is higher than the pump population) to ensure that no dry run occurs (see Figure 6-8). Although most pumps do not run dry, some pumps can run slightly longer than other pumps under dry conditions (see Figure 6-9). Advantages and Disadvantages of Screw Pumps: They are well known for their wide range of displacement and pressure and are suitable for conveying viscous and abrasive substances in low and medium temperature rooms (300 ° F). They are also suitable for use at lower speeds Run (no more than 300-400r / min). In summary, although the screw pump has the function of dry turn, but it is recommended that you should not dry run. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Zeng Fenfen (QQ / micro letter: 2355962927) starting: http: //beng.liuti.cn / (Service Hotline: 400-6030-811)