R300A vacuum suction filter is a brand-new laboratory suction filtration product. It has many differences in design, material selection and operation and sand filter solvent filter. It greatly simplifies the operation steps and makes filtration become simpler. R300A was designed from the beginning to change many of the defects of the old products, to avoid leakage and improve the sealing performance, to reduce the damage to the filter caused by misuse, to make the filter easier and easier to use, so that it is not needed for filtration. Personnel care. Compared with traditional sand core solvent filters, the main changes are:
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The traditional sand core solvent vacuum filter is made of glass material. If it is mishandled during use, the glass itself is a fragile material, which is easy to be broken and broken, which increases the purchase cost of consumable parts in the later stage. The gasket of the filter membrane is made of sand core glass material. If the colored and viscous sample is filtered, it is very easy to cause blockage and stain of the sand core. Because the diameter of the sand core is fine, cleaning is difficult; because the glass cannot be made very complicated The structure, so the traditional solvent filter can only be fixed by the clamp when sealing the filter membrane and the sand core membrane base. Since the upper and lower glass components are not sealed by soft materials, the sealing performance is not satisfactory, and the fixture is fixed in operation. It is also more troublesome. 
1. Innovative automatic injection design, that is, the traditional manual dumping of the filtrate, or automatic liquid feeding. Simply put one end of the inlet hose into the liquid to be filtered, and the other end is connected to the inlet of the funnel cup cover. After vacuuming, the liquid will suck into the filter bowl by itself, without manual pouring.
2. The filter cup of the rotary card filter funnel and the filter placement base are connected by a rotary card. The filter cup and the funnel base can be separated and assembled by simply rotating the filter cup, and the traditional sand core filter is used. The rotary card filter funnel does not need to be fixed by attachments such as clamps or clamps, compared to the clamp-sealed filter bowl and the base portion. It is convenient to take the filter and better sealing performance.
3. The filter bottle pump tube connector has a protective cap, which can completely prevent the problem of excessive force and easy to break the glass suction filter bottle interface when the vacuum pump tube is inserted or removed. Reduce the purchase cost of consumable parts in the future, and save the user a fee.
4. The bottom has a fixed base that can be attached to a smooth table to prevent the filter bottle from shaking and pouring.
5. The filter bottle and the suction filter cup are marked with a tick mark for the user to observe.
6. It is equipped with a vacuum gauge and a vacuum regulating valve as standard, which is convenient for the user to adjust the filtering speed according to actual needs during filtration.
7. Water-repellent filter with anti-waste suction, can directly block the liquid into the pump, and use more peace of mind.
8. The bottom of the suction filter bottle has a liquid discharge port and a liquid discharge pipe. When each time the filter bottle is full of liquid, the liquid discharge pipe clamp can be loosened, and the filtrate in the suction filter bottle can be directly discharged from the bottom liquid discharge port. It is not necessary to stop the suction pump after each filter bottle is full. The filter funnel can be removed to pour out the filtrate.
In terms of application, R300A can be used for microbial limit check filtration, SS suspension solids limit and filtration of various other laboratory aqueous or weakly corrosive solvents. The traditional sand core filter can only be placed under the filter film of 10 microns or less due to the core hole diameter of 10 microns. The various filter membranes with a pore diameter of more than 10 microns, aluminum and filter screens cannot be used, and the scope of use is also obvious. limits.
Difference between R300A vacuum suction filter and sand core filter and different application range