香港蓝月亮精选免费资料大全

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  • Cooling liquid circulating pump, low temperature circulating pump factory direct sales are especially suitable for pilot test, testing, and various chemical, biological, and physical experiments that need to maintain low temperature conditions. It is used in medicine and health, food industry, metallurgical industry, chemical industry, and material industry. As well as a group of instruments in the laboratories of scientific research institutes of universities and colleges.

    Coolant circulating pump, low temperature circulating pump factory direct sales

  • Manufacturer of low-temperature coolant circulation pumps. Low-temperature circulation pumps are suitable for pilot test and testing, and for various chemical, biological, and physical experiments that need to maintain low temperature conditions. They are used in medicine and health, food industry, metallurgy industry, chemical industry, material industry and Groups of instruments in the laboratories of scientific research institutes in universities and colleges.

    Low temperature coolant circulation pump manufacturer, low temperature circulation pump

  • 100L double-layer glass reaction kettle is equipped with reaction materials in the inner container, and can be evacuated and agitated at the same time. The interlayer can be introduced with freezing liquid, water and high temperature liquid to heat and cool the material. Used in chemical, fine chemical, biopharmaceutical new material synthesis experiments, pilot tests and production.

    100L double glass reactor

  • The pilot low-temperature coolant circulation pump can provide coolants that meet the dual requirements of temperature and water quality for large-scale precious experimental equipment such as high-purity metals, purification of rare substances, environmental laboratories, magnetron sputtering, and vacuum coating equipment.

    Pilot low temperature coolant circulation pump

  • Circulating water cooler DL-400 circulating nozzle 360 ° rotation: 1. Tailored for small rotary evaporator, reasonable design, compact shape can effectively save space, can be used on the workbench or on the ground; 2. refrigeration compression The machine uses international brand products, high reliability, can work for a long time ...

    Circulating water cooler DL-400 circulating nozzle 360 ° rotation

  • DLSB-10L / -30 ℃ low-temperature coolant circulation pump: 1. Storage tank volume: 10L, no-load Z low temperature: -30 ℃; 2. Large-capacity open bath and external circulation are integrated, which can be used as a freezing tank, and Can provide external coolant; 3. For 5L rotary evaporator, has a good cooling effect ...

    DLSB-10L / -30 ℃ low temperature coolant circulation pump

  • Zhengzhou Great Wall Rotary Evaporator R-1001-VN small 2L: 1. It can be combined with circulating water multi-purpose vacuum pump, diaphragm vacuum pump, low temperature circulation (vacuum) pump, circulation cooler, constant temperature circulator, low temperature coolant circulation pump and other supporting components Device; 2.Teflon (PTFE) and fluorine rubber ...

    Zhengzhou Great Wall Rotary Evaporator R-1001-VN Small 2L

  • Large capacity large diameter rotary evaporator rotary evaporator, Zhengzhou Great Wall Technology Industry and Trade Co., Ltd. is made of high borosilicate glass material, Teflon (PTFE) and fluorine rubber dual rotary seal, technology to ensure high vacuum. 4. Collection bottle 5L, rotating bottle 10L5. Digital display temperature control range: normal temperature ~ 9 ...

    Zhengzhou large rotary evaporator

  • The laboratory circulating water vacuum pump provides vacuum conditions for processes such as evaporation, distillation, crystallization, drying, sublimation, filtration, decompression, and degassing. It is particularly suitable for colleges and universities, research institutes, chemical, pharmaceutical, biochemical, food, pesticide, and agricultural Laboratories and pilots in engineering, bioengineering and other industries.

    Laboratory circulating water vacuum pump

  • Zhengzhou Great Wall factory direct sales DLSB-5 / 20 low temperature coolant circulation pump: 1. Storage tank volume: 5L, no-load Z low temperature can reach -20 ° C; 2. Can be used as a cooling tank, or as a cold source for other Equipment cooling; 3. Professional manufacturer Zhengzhou Great Wall Technology Industry and Trade Co., Ltd. direct sales; 4 ...

    Zhengzhou Great Wall factory direct sales DLSB-5 / 20 low temperature coolant circulation pump

  • The glass reactor manufacturer Zhengzhou Great Wall specializes in the production of double-layer glass, which is mainly used for experiments such as material synthesis, distillation, and concentration. The structure of the kettle body is divided into three types: single layer, double layer and three layers. If necessary, the kettle can be pumped to a negative pressure state to meet the experimental conditions. Control the material by adjusting the regulating valve on the constant pressure funnel or the feeding bottle ...

    Glass reactor manufacturers

  • The multi-purpose vacuum pump for circulating water in the laboratory provides vacuum conditions for processes such as evaporation, distillation, crystallization, drying, sublimation, filtration, decompression, and degassing. It is particularly suitable for colleges and universities, research institutes, chemical, pharmaceutical, biochemical, food, pesticide, Laboratories and quizzes in agricultural engineering, biological engineering and other industries.

    Laboratory circulating water multipurpose vacuum pump

about us
Zhengzhou Great Wall Technology Industry & Trade Co., Ltd.

( 原郑州长城仪器厂 ) ,成立于 1988 年,至今已走过三十多年历程,是集研究、开发、制造、经营为一体的科技创新型企业。 Zhengzhou Great Wall Scientific Industry and Trade Co., Ltd. ( formerly Zhengzhou Great Wall Instrument Factory ) , established in 1988 , has gone through more than 30 years of history. It is a scientific and technological innovative enterprise integrating research, development, manufacturing and operation. Today, the company's products have spread throughout Asia, Europe, and the United States, covering most domestic laboratories. The Zhengzhou Great Wall brand is ...

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The working principle of the low-temperature coolant circulation pump is as follows: First, let's talk about the working method of the equipment in the pump body. When the pump is in use, first fill the pump body with water, and drive the water pump impeller under the high-speed rotation of the electric motor. High-speed rotation, so the water in the impeller also rotates with the pump. Under the action of the centrifugal pump, the liquid is discharged through the outlet pipe. After the water is discharged, a vacuum is formed near the rotating shaft in the pump casing. When the pump is filled with water, centrifugal force is generated when the impeller rotates. The reduction of the impeller center pressure is due to the centrifugal force of the water in the impeller channel, which is thrown around the periphery and flows into the pump casing. This pressure is generally lower than the pressure in the steam inlet pipe. Impeller, so that the pump can continuously absorb water continuously
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