Whether the laboratory vacuum pumping device needs to be equipped with a vacuum pump
Decompression vacuum filtration laboratory A wide range of test operations carried out in many customer laboratories. The solids in the liquid can be trapped on the filter membrane by suction filtration to achieve the purpose of solid-liquid separation. This method can filter out algae, microorganisms, particulate matter or other various suspended substances in the water sample for later inspection and testing, and can also clarify and filter out impurities, reagents and other various liquids and solvents required. Or sterilization. It can be said that the use is very extensive.
Integrated vacuum filter with built-in oil-free vacuum pump-VF204A
Generally, a filter device is required for filtration, including vacuum suction pump for suction filtration, filter funnel, filter base (for preventing filter), filter bottle, connecting hose, vacuum gauge and regulating valve, buffer bottle. and many more. The most expensive to purchase such a complete suction filter device is the suction pump, so some customers will ask whether they can use the vacuum pump instead of the vacuum pump. It is necessary to prevent filtration membranes, filter paper, filter cloth or filter elements from being trapped during filtration to trap particulate matter, microorganisms or other solids in the liquid. Since the pore size of the filter membrane, filter paper, filter cloth or filter element is very small, it will cause great resistance to the passage of the liquid, so that the liquid cannot pass through the filter core portion by gravity alone.
The function of the suction pump is to draw the vacuum bottle into a vacuum state. The pressure difference between the inside and the outside of the filter bottle is formed. The air in the upper part of the filter cup squeezes the liquid, so that the liquid that originally thought that the resistance cannot pass accelerates through the filter. At the same time, using different suction pumps, the filtrate passing rate will also have a large difference. In general, the filtered liquid is the same, and the higher vacuum pump filtrate passes through the filter faster.
Left: General purpose vacuum pump
Right: Diaphragm vacuum pump resistant to strong chemical corrosion
In summary, the suction pump is a necessary firmware to ensure vacuum vacuum filtration. Without it, the filtration speed may be very slow or even normal filtration. When purchasing a vacuum pump, you should select a vacuum pump that can be used without oil or plug. Conventional oil pumps and water circulation vacuum pumps may suck up contaminated samples. Under normal circumstances, customers can choose R300 vacuum pumping pump, this model is small in size, low in noise, can be used after plugging in; if the filtered sample is high in content or extremely viscous, vacuum can be selected as described above. Higher R410 oil-free vacuum pump, 730mmHg high vacuum can provide stronger suction, push the filtrate through the filter; if it is corrosive samples, organic solvents, etc., you need to consider the use of chemical resistance Corrosion diaphragm vacuum pump CH300, the gas contact parts are made of tetrafluoroethylene, which has excellent chemical resistance.
More information about laboratory vacuum filtration systems and suction filtration vacuum pumps is available on our website.
Pain Relief Patch for Breast
[Name] Medical Cold Patch
[Package Dimension] 10 round pieces
The pain relief patch is composed of three layers, namely, backing lining, middle gel and protective film. It is free from pharmacological, immunological or metabolic ingredients.
[Scope of Application] For cold physiotherapy, closed soft tissue only.
[Indications]
The patches give fast acting pain relief for breast hyperplasia, breast fibroids, mastitis, breast agglomera tion, swollen pain.
[How To Use a Patch]
Please follow the Schematic Diagram. One piece, one time.
The curing effect of each piece can last for 6-8 hours.
[Attention]
Do not apply the patch on the problematic skin, such as wounds, eczema, dermatitis,or in the eyes. People allergic to herbs and the pregnant are advised not to use the medication. If swelling or irritation occurs, please stop using and if any of these effects persist or worsen.notify your doctor or pharmacist promptly. Children using the patch must be supervised by adults.
[Storage Conditions]
Store below 30c in a dry place away from heat and direct sunlight.
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