Centrifuge sealing treatment

Centrifuges used in medical and pharmaceutical-related industries require high-level environmental requirements, such as in aseptic workshops, whether they require non-sterile or aseptic environments. In the workshops of 10,000 and 100,000 grades, the good sealing performance can effectively isolate the outside from the inside of the machine. The solid, liquid, and gas phases in the inner cavity of the centrifuge must not be cross-contaminated with the operator or the external environment. In general, the user should inform the centrifuge manufacturer when ordering and ask for the seal. Manufacturers should improve the design of the centrifuge's containment performance and fully reflect it at the time of manufacture. It is generally considered in the following areas:

Seal of the cover: Because the cover can be turned over, the joint surface of the cover should have reliable sealing measures. If the seal structure or material is used for corrosion failure, it may cause leakage of liquid and gas, causing damage to the environment and personnel.

The anti-corrosion performance of the sealing groove structure and the sealing strip should be fully considered in the design and selection of its sealing performance and reliability.

For the installation interface of the feeding device, washing tube, sight glass and other additional devices, there should also be reliable sealing measures.

Sealing of the bearing position: For the sealing of the spindle nut and the bearing position, the sealing measures of the conventional conventional models in this respect are relatively simple and can only be relatively sealed. For example, the spindle nut part, the spindle nut and the drum joint surface, generally no sealing ring is provided. The liquid phase and the gas phase infiltrate during the operation of the centrifuge, causing corrosion to the taper surface of the spindle, and even infiltrating into the bearing, causing damage to the bearing, thereby affecting The normal use of the machine. The upper bearing cap is generally provided with a skeleton seal and the like, but a part between the upper bearing cap and the drum cone is exposed, and the gas phase in the inner cavity of the centrifuge may corrode the exposed surface of the spindle. The centrifuges used in the pharmaceutical industry mostly contain organic solvents or acids, alkalis, salts and other media. Therefore, when ordering equipment, the sealing requirements of these parts should be fully taken into account, and dynamic sealing or static sealing structures should be provided to achieve Sealing requirements.

The sealing of the working area of ​​the transmission belt: the transmission belt of the traditional centrifuge is open, but a protective cover is arranged at the motor end, mainly from the safety point of view to improve the safety of its use, but the dust generated by the friction is environmentally polluted. It is not added to the control. It is not feasible to use it in the clean area. Therefore, the working area of ​​the belt must be sealed to prevent the leakage of friction dust.

Other parts (exit pipe, feed pipe, discharge hopper, etc.): For external pipes of centrifuges, such as feed pipes, washing pipes, cleaning pipes, etc., flange installation is generally used to ensure that The sealing performance of the interface, for some occasions where the cleanliness is very high, the interface should be a hygienic quick-open interface device for easy cleaning.