ã€Pump News Asia】 stainless steel gear pump gear pump, in particular, is a kind of acid-resistant, wear-resistant gear pump. How to choose the right model to play its role in drinking water supply system, pressure boiler water supply system and pharmaceutical, fine chemical, papermaking and other industries is particularly important. Small series finishing stainless steel gear pump selection principles and selection of basic conditions to help you better use. Stainless steel gear pump 1, according to the device layout, topography, water conditions, operating conditions, to determine the choice of horizontal, vertical and other types of pumps. 2, according to the nature of the liquid medium to determine the water pump, hot water pump or pump, stainless steel gear pump, chemical pump or corrosion-resistant pump or impurity pump, or non-clogging pump. Pumps installed in the explosive area should be based on the explosion area level, using the appropriate explosion-proof motor. 3, according to the size of the flow, to determine the menu suction pump or double suction pump; according to the level of the head, single-stage pump or multi-stage pump, high speed pump or low speed pump, multi-stage pump efficiency than single stage pump, paint pump / / Screw pump / stainless steel gear pump / asphalt pump / high viscosity pump such as single-stage pump and multi-stage pump can also be used, the first choice of single-stage pump. 4, to determine the specific model of stainless steel gear pump pump characteristic curve, find the required flow value on the abscissa, the desired value of the lift found on the ordinate, from the two values ​​were drawn up and down, respectively, vertical or horizontal line, two lines The intersection point just falls on the characteristic curve, then the pump is to be selected pump, but this ideal situation is generally small, usually run into the following two situations: The first: the intersection point in the characteristic curve, indicating that the flow to meet the requirements , But the lift is not enough, at this time, if the lift is almost the same, or a difference of about 5%, can still be used, if a lot of head difference, then choose a larger lift stainless steel gear pump. Or try to reduce the pipeline resistance loss. The second: the intersection of the curve below the characteristic curve, in the fan characteristic trapezoidal trapezoidal range, initially set this model, and then according to head difference between how many, to decide whether to cut the impeller diameter, if the head difference is small, do not cut, if According to the required Q and H, according to its ns and cutting formula, cut the impeller diameter, if the intersection does not fall within the range of fan-shaped trapezoid, should choose a pump with smaller head. Select stainless steel gear pump, sometimes have to consider the production process requirements, choose different shape QH characteristic curve. 5, stainless steel gear pump model is determined, the pump or transport medium near the water of the physical and chemical pump, need to go to the relevant product catalog or sample, according to the model performance chart or performance curve to be revised. 6, for the delivery of liquid pump viscosity greater than 20mm2 / s, must be the experimental curve of the water pump into the viscosity performance curve, in particular, to inhale performance and input power for careful calculation or more nuclear. 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:) starting: http: //beng.liuti.cn / (Service Hotline:)
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