The mixer does not contact with gas-lubricated mechanical seals (low speed) on the market, there are already more than 10 years. During the past 10 years, has made a series of experiences. This paper summarizes a number of important insights. When properly used in the appropriate purposes, the mixer gas seal can help users improve the quality and improve product purity.
When you seal in the discussions machinery, it is important to you to figure out the difference between a variety of sealing systems. There are three basic types: fluid lubricated mechanical seals, gas-lubricated contact mechanical seal and out of style or gas lubricated non-contacting mechanical seals.
The difference is that the fluid in the fluid lubrication seals between the sliding surfaces. As a result, these seals are usually applied to mixed friction mixer. For dry running seals, two sliding surfaces are in direct contact with each other. On the other hand, does not touch the gas-lubricated mechanical seal in the operation of the sliding surface in direct contact. 1 ~ 5μm wide gap will be separated from the surface, which is why this seal is usually called the breakaway seals reason. When you referred to the gas damping of double seals, there should be this difference. From this point, we will only discuss the gas-lubricated contact mechanical gas seals.
Gas seal How does it work? At work, there should be a layer of only a few μm-meter gap, in order to produce the gap, the two sliding surfaces another disengagement between the two sliding surfaces. To achieve this, a ring manufacturing three-dimensional slot, it ensures that the air of static and dynamic role to play. The pressure differential seal parts at the air static effect, while the rotation of the aerodynamic effects. Formed by the lift and closed the force balance, thus forming a 1 to 5 μm wide seal gap.
Gas seals in a blender
Use of gas in a blender seals the user has three major advantages:
■ there is no leakage of liquid;
■ no effect on product quality;
■ reaction has little effect or no effect;
This seal also has other advantages. Include:
■ Operation Clean (GMP);
■ low friction loss;
■ noise does not occur;
■ A small mechanical wear or did not wear.
If the seal system used in the mixer is suitable for the above requirements, this seal is a combination of
The main purpose of the mixer is the current (low speed)?
■ DIN mixer is used with steel containers meet the requirements in DIN seals;
■ DIN mixer used for enamel container with in accordance with DIN standard seals;
■ used for disinfection purposes mixer;
■ vertical suction filter / drier;
■ Special use (horizontal installation) product.
Pressure uses, such seals are usually used in vacuum conditions, up to 6bar.
In the past 10 years, since the seal was first introduced to the use of low speed, it has been a lot of experience. Users in the learning stage, has made a number of important insights. Part of the mechanical seals users 40 years of liquid lubrication seals use experience, has made very clear the differences and limitations still should be recognized and given provisions. Is not used in the past the seals in the liquid of each product are applicable to the gas seal. The main consideration is the product of factors has a high sensitivity (for example, the sealing surface of Collisions). In order to offset the impact and use many kinds of other parts, such as the patented flush mounting flange. When the sealing surface is automatically aligned to performance degradation, self-conversion to gas consumption, sealing surface blowing or rinse. This flush installation side for steel containers especially suitable for enamel containers (plastic containers). In addition to the experience gained from the application of the gas seal in the storage and use of a series of new insights. Between shipments and began to use seal when the seal parts to achieve its first change after many years. At the same time, a variety of factors can affect the characteristics of the gas seal. Accidentally add too much grease or lubricant - grease or lubricant in the assembly entered or penetrated into the sealing gap. Then in use, the resulting gap is not balanced, seal damage occurred. Based on its past experience, seals Before you start, it should be checked. If long storage period, and also having an impact on aging of elastomers.



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