Selection of pump system 1. Selection of tubing ◆ As a condition of a
Peristaltic Pump Hose · Has a certain flexibility, that the shape of the hose can quickly recover after radial compression · Has a certain degree of wear resistance · Has a certain ability to withstand pressure · Infiltration Leakage (good air tightness) * Low adsorption, good temperature resistance, not easy to aging, non-swelling, corrosion resistance, low precipitation ◆ Hose parameters Hose diameter, wall thickness as the main parameters, different manufacturers have different Of the way; such as: code with the specification and "diameter × diameter" said. ◆ Hose material Silicone rubber, rubber, plastic, synthetic materials, different materials show different properties, have different uses. ◆ The choice of hoses should consider the following factors: • Chemical resistance / chemical compatibility Hoses should exhibit certain good chemical properties when transported in different fluids, which is called chemical compatibility. Such as: low adsorption, good temperature resistance, not easy to aging, non-swelling, corrosion resistance, low corrosion resistance of the precipitate with the increase of the temperature decreases, at room temperature on the tube did not affect the chemicals may rise with temperature High impact on the hose. The application of pressure
Peristaltic Pump is limited by the pressure-bearing performance of the hose. If the system pressure exceeds the ultimate pressure of the hose, the hose will expand, resulting in excessive hose wear or hose rupture. Affect the hose pressure factors: material, diameter and wall thickness ratio. Temperature hose to adapt to the operating temperature range is the user to consider. Different materials have different temperature performance. Size The size of the hose has a direct effect on the flow. An excellent pump design takes into account the inner diameter and wall thickness of the hose to match the optimum hose size or tube size. The inner diameter of the hose determines the flow rate; wall thickness affects the ability of the hose to be compressed and rebound, and also has a significant impact on the life of the hose. · Certified hose may have to pass the relevant certification when used for related purposes. Such as the US Pharmacopoeia standard USP, the European Pharmacopoeia standard EP, the US Food and Drug Administration standard FDA, the USDA standard USDA and the National Health Foundation standard NSF. Flexible hose / flexibility / different life Hose roller resistance repeated squeeze, the ability to friction different. Different pipe, pipe, pump head, running speed has a different life expectancy. Life expectancy In the pump system is called the flexible life, in specific applications, the pump features are very consistent. Choose long life, thick-walled tube, the choice of
Large Flow Pumps, run at lower speeds can get longer hose life. 2. Select the pump head to choose a single, multi-channel transmission fluid is easy to replace whether the hose is easy to fix Hose pressure pipe clearance through the ratchet fine-tuning to adapt to different wall thickness hose roller selection: 6 roller structure relative flow slightly larger; 10 roller Fluctuations in the structure of the fluid flow smaller Trigger the structure is smart, open the card is easy 3. Select whether the need for flow control drive Whether the need for traffic Flow can be allocated How the protection level The overall structure is reasonable
May 20, 2021
