I. Product Overview 
 Of ZDK, the DK centrifugal micro water pump, the pump is mainly composed by three parts of motors, pumps, seals. The motors are single-phase asynchronous motor; the pump with self-priming. Equipped with a single mechanical seal between the pump and motor, fixed only seal the mouth with the "O" shaped oil-resistant rubber seal ring for static sealing. 
 Second, use 
 This series pump, small size, light weight, compact, easy to install, is an ideal energy-efficient household electric pumps, widely used in agricultural irrigation, sprinkler, garden spray irrigation, vegetable greenhouses water aquaculture water supply and drainage as well as well carrying water, water pressure water the occasion of family life. 
 Third, the working conditions 
 Should be able to pump in the following conditions of use for normal work: 
 A medium temperature does not exceed +40 ℃; 
 2, the medium pH value between 6.5 ~ 8.5; 
 3, the volume of solid impurities is not more than 0.1%, particle size not greater than 0.2mm; 
 4, the power frequency is 50Hz, voltage for single phase AC 220V, the voltage fluctuation range of 0.9 to 1.1 times the rating. 
 Qinhuangdao City Metropolitan Pump Co., Ltd. was established in 1989, is a professional company engaged in various types of pumps, frequency conversion constant pressure water supply, no negative pressure sets of sets of fire and electrical control equipment. The company is located in the harbor area of ??Qinhuangdao City, Youyi Road 188, the company annual sales of pumps nearly 30,000 units, operated by nearly 10,000 kinds of specifications, because different products have a professional marketing team and after-sales service team, and excellent quality. reasonable prices, favored by the users. Widely used in industries and fields of construction, fire protection, environmental protection, electrical, HVAC, chemical, agricultural irrigation, etc. ... 
 Acting Company of domestic and foreign brand-name products: Pump New Territories (listed company), Leo water pump (listed company), Shanghai Tianquan Pump Group (brand name), Rainbow Silver Pumps (Hebei famous brand), Frog Pump (China famous brand ), Zhejiang earth (specializing in the production of submersible pumps), Shanghai Huafeng (specializing in the production of mixing sewage pump), Pak Fuk Pump (specializing in the production of stainless steel, constant pressure water supply equipment) the Xingyuan gear pump, pump and Taiwan, Miao, Italy Ze mud special pumps, the Jiaqing water belt, Great Wall Group inverter INVT Inverter ABB frequency converter, gold positions inside and outside enamel water tank, the people all stainless steel submersible pump ... 
 The company is divided into the following departments: sales pipeline pump, centrifugal pump sales, sales of the chemical pump, submersible pump sales, well pump sales, service department, customer service department, finance department, electrical department, e-commerce. .. can provide users with a professional sales and service, and improve quality service and reliable technical support. The company continued to introduce domestic and international brand-name products ... pump products to provide customers with high quality low price and good service supply manufacturers to improve product sales and improve the reputation of manufacturers in order to achieve a win-win. 
 Company aim: to take care of your employees, staff will take good care of your customers, then customers will take good care of your profits. The interests of employees and customers is the company's interests, the interests of employees and customers, no company