Introduction to aseptic sampling valve structure characteristic

Aseptic sampling valve structure mainly includes the sealant sets of sample, sample room, mouth and stainless steel thimble, spring, plunger sleeve, manual handle (the difference between manual and automatic aseptic sampling valve is whether to use pneumatic device, its basic principle is the same, normally sterile sampling valve with appropriate size of the sampling head), etc.The basic working principle is that when in the closed state, the thimble is pushed by spring tension or other pressure, and the thimble presses the sealant head on the hole of the tank wall to achieve the sealing effect.If sampling is needed, steam or other bactericidal media should be passed through one of the sampling ports, and the whole sample room should be filled and exported from the other sampling port. After a certain period of time, the sample room and sampling port should be kept in a sterile state.The sample is then discharged from the tank through the sample chamber and collected from the sampling orifice by twisting the handle, retracting the spring and loosening the thimble so that the sealant head is detached from the hole in the tank wall.After sampling, twist the handle, loosen the spring, and press the sealant head again through the thimble at the opening in the tank wall.

The residual liquid in the sample room will be discharged with clean water, and then injected into the sterilizing medium for sealing and retention, waiting for the next sampling.The application points of aseptic sampling valve include cold wort, fermentation liquid, yeast mud, deoxidized water, sake, aseptic water, etc.From the above principle of use, it should be said that under normal maintenance conditions, the use of a large number of specialized sterile sampling valves in the production site is undoubtedly one of the effective means to improve the level of microbial management and control.But in sterile sampling valve can really know the role and impact and use of maintenance and other aspects, it should be said has some deficiencies, it can improve the accuracy of the samples, do a comprehensive understanding for sample appearance, but also because of negligence to the sample of pollution on the operation and influence on the result of judgment, and even caused by the lack of maintenance and management by sampling medium pollution as a whole.Now I will give some examples and analyze the cases that I have met.*, application in pipeline.Take the sterile sampling valve installed on the wort tube as an example, the situation encountered in the early stage was that contamination was found in the microbial detection of * batches of wort after CIP, but not in the second and third batches. Besides, the temperature of the top water was high, reaching above 85℃.The compressed air used for oxygenation is also sterile after being filtered by a sterile membrane.This raises the question, where did the contaminated microbes come from?After analysis, the suspected object was fixed on the sterile sampling valve.As rich nutrition for the growth of yeast extract matrix, has high sugar, when sampling, wort through an opening in a wall, sample room, and sampling, sampling after cleaning, the sample room and sampling mouth part of the residue can be easily cleaned, but in the contact section of the sealant head and pipe wall is not easy to remove, to the next sampling sterilization when heated becomes sticky becomes more difficult to remove, in the long run will be formed after health corner.The above suspicions were confirmed during the disassembly inspection of the sterile sampling valve.