国产免费又爽又色又粗视频,亚洲AV久久无码,国产成人无码区免费网站,欧美精产国品一二三产品动漫

NEWS
Several control modes of metering pump
Time:2019-01-22 01:47:44 Browse:2996

The metering pump is a pump specially used for metering and transporting liquid. Most metering pumps use plunger pump and diaphragm pump structure (see reciprocating pump), but also useful gear pump structure, because they can maintain constant flow independent of discharge pressure. The metering capacity of a metering pump is determined by the amount of fluid pumped out each time. Under a certain effective diaphragm area, the volume flow of metering pump output fluid is proportional to stroke length L and stroke frequency F:V_A*F*L. The metering pump can realize two-dimensional adjustment of metering pump output by adjusting stroke length L and stroke frequency F when the metering medium and working pressure are determined. Although stroke length and frequency can be used as adjustment variables, stroke length is generally regarded as coarse adjustment variable and stroke frequency as fine adjustment variable in engineering application: adjust stroke length to a certain value, and then achieve fine adjustment by changing its frequency to increase the flexibility of regulation. In relatively simple applications, the stroke length can also be set manually, and only the stroke frequency can be used as a variable to simplify the system configuration. Following is an introduction to several different control modes of metering pumps.

Base-type control mode of metering pump
In some special occasions, such as pH adjustment, metering pump acts as actuator, adding acid or alkali under the control of regulator. In order to simplify the system configuration and improve the reliability, the embedded control system with microprocessor as the core is directly integrated into the metering pump, so only an external pH sensor is needed to form a complete regulation system. The concept of base intelligent metering pump can also be applied to control other process parameters, such as redox potential (ORP) and residual chlorine concentration regulation.

Procedural control mode of metering pump setting
Because of the internal integration of microprocessor, the regulation and operation performance of some metering pump products has been fully improved. Besides following the external control commands to achieve real-time metering flow regulation, it also has many tasks, such as quantitative addition, time series trigger program addition, event sequence trigger program addition, time-event hybrid trigger program addition and automatic correction. The model can also provide useful information such as the total amount of fluid pumped out, the number of remaining strokes and the capacity of the fluid to be transported, the stroke length and other relevant working parameters of metering pumps. Time series trigger program mode makes metering pump add working medium quantitatively according to the set stroke number or time at the specified time according to the real-time clock and the pre-planned task list, and the time can be set flexibly in the cycle of every hour, day, working day, public holiday, one week and two weeks; while event sequence trigger program mode makes metering pump complete. According to the real-time trigger event, according to the pre-planned task list, the working medium is added quantitatively according to the set stroke number or time when a specific event occurs (contact input).

Fieldbus ProFibus Control Mode
In large-scale and highly automated applications such as petrochemical industry, metering pumps use digital communication protocol to transmit data between automation equipment at high speed and then form a network control system, which has large capacity and high reliability, and has become the mainstream of development. Following the introduction of the German DIN standard in the early 1990s, the field bus ProFibus became the European standard (EN50170) in the late 1990s. It has been widely used in the world and has become one of the representative protocols in field bus technology.

Using metering pump can accomplish three functions of transportation, metering and regulation, thus simplifying production process, realizing automation and semi-automation, and improving product quality. Using multi-cylinder or multi-metering pumps, several kinds of media can also be mixed into the reactor in an accurate proportion. The research and development of metering pump has gone beyond its traditional purely pursuit of capacity and material, and turned to the development direction of high precision, multi-function and intelligence. This trend has become the consensus of the world's major metering pump manufacturers.

CONTACT
Join:All the products of our company are for the whole country to recruit agents. If you want to join in business and order, please contact us by the following ways.
13771177635Mr. Liu
13921516709Mr. Zhao
Email
sales@yuanshuflow.com
Room 201-1, Famous Creative Intelligence Park,
501 Nanhu Avenue, Liangxi District, Wuxi City

Focus on Wechat Public Number

Focus on Mobile Official Website
Copyright © 2019 Wuxi YuanShu Intelligent Fluid Technology Co., Ltd. All Rights Reserved   備案號(hào):蘇ICP備19004024號(hào)
国产免费又爽又色又粗视频,亚洲AV久久无码,国产成人无码区免费网站,欧美精产国品一二三产品动漫

            性开放按摩A片免费看| 日本动漫瀑乳H动漫啪啪免费| 一本色道久久88加勒比—综合| 久久人人爽天天玩人人妻精品| 免费A级毛片在线播放不收费| 脱了内裤猛烈进入A片费| AV性色| 久久精品人妻无码一区二区三区| 法国情欲片巜野性无码| 免费观看片的APP下载| 日韩GAY小鲜肉啪啪18禁| 国产成人精品A视频一区0| 豪妇荡乳1—15章| 国产无遮挡吃胸膜奶免费看| 久久婷婷五月综合色国产香蕉| 性色AV网站| 国内少妇人妻丰满AV| 国产成人精品一区二区三区免费| 被黑人扒开双腿猛进| 公与淑婷厨房猛烈进出视频韩国| 丰满爆乳一区二区三区 | JAPAN丰满人妻HDXXXX| 两个奶被揉到高潮视频| 亚洲精品国产精品乱码不卡√| 亚洲精品一区二区另类图片| 天天综合天天做天天综合| 国产午夜视频在线观看| 国产SUV精二区九色| 亚洲AV无码久久寂寞少妇| 国产亚洲精品一区二区三区| 国产精品无码一区二区三区四区| 成人在线电影| 国产一区二区在线视频| 日韩精品视频一区二区三区| 成人国内精品久久久久一区| 欧美激情一区二区三区在线| 精品国产污污免费网站入口| 亚洲成熟女人毛毛耸耸多| 亚洲愉拍99热成人精品| 久久婷婷色综合一区二区| 人人妻在人人|