Nanjing Runze Fluid Control Equipment Co., LTD.
Nanjing Runze Fluid Control Equipment Co., LTD.
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Peristaltic Pumps in Seed Coating


In the seed coating process, seed coatings can be customized according to specific requirements, allowing for the enlargement of small seeds and the shaping of irregular seeds to facilitate precise mechanized planting. Coatings may include fertilizers to provide essential nutrients for initial seedling growth, various chemicals to protect against pests and diseases, as well as additives such as magnetic powder, salt-resistant agents, pH adjusters, oxygen enhancers, high-water-absorption resins, and fluorescent dyes, serving a multitude of purposes. Seed coating enhances germination rates at a low cost, laying a solid biological foundation for increased yields. Moreover, it contributes to precision application techniques, reducing the use of pesticides and fertilizers, increasing efficiency, minimizing soil pollution, and promoting sustainable development in line with the direction of ecological agriculture.


Peristaltic pumps used in seed coating machines must meet specific requirements:

  1. Excellent sealing performance to prevent leakage and contamination of the coating solution.

  2. Strong corrosion resistance to transport corrosive agents effectively.

  3. Stable operation with consistent flow rates to ensure uniform and smooth coating and consistent pellet size.

  4. High operating precision and wide adjustment range to accommodate various coating requirements and achieve optimal coating results.

  5. Smooth and unobstructed fluid transfer to prevent blockages and pooling of coating solution.


Commonly used fluid transfer pumps in seed coating machines include metering pumps and peristaltic pumps. Metering pumps are essentially reciprocating pumps, divided into diaphragm and plunger types depending on the transmission method. They operate by driving a plunger back and forth using a motor to change the pump chamber volume, thereby suctioning and discharging the medium. In contrast, peristaltic pumps transport media by compressing tubing with rollers.


The application of these types of peristaltic pumps in seed coating offers several advantages. Firstly, they provide precise and consistent fluid delivery, ensuring uniform seed coating and pellet size. Secondly, peristaltic pumps are highly versatile and can handle a wide range of coating solutions, including corrosive chemicals, without risk of contamination. Additionally, their gentle pumping action minimizes shear stress on the coating solution, preserving its integrity and effectiveness. Moreover, peristaltic pumps require minimal maintenance and offer long-term reliability, contributing to cost-effectiveness and operational efficiency in seed coating processes.


Overall, the use of peristaltic pumps in seed coating machines plays a crucial role in enhancing seed quality, promoting sustainable agricultural practices, and improving crop yields, making them indispensable in modern agricultural applications.


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