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What Really Matters: Decision Criteria For Agitator Seals
Feb 23, 2017

It is not always easy to know which sealing system is best for your application. Operating parameters such as pressure, temperature, and speed may not be the only things to think about. Explosion protection (ATEX), environmental protection and operational safety can be equally important. If you are in the food or pharmaceutical industry, then GMP, FDA-compliant materials and hygienic design will be major issues. It’s best to seek professional advice and get the seal manufacturer on board as early as possible. This article compares different sealing systems for agitators and special equipment.

Lip seals and mechanical seals are the most popular choice for equipment with rotating shafts. In principle, both are suitable for simple applications at pressures up to 6 bar, temperatures up to 200°C and speeds up to 2 m/s. Lip seals are not suitable for vacuum applications, and dry running or liquid lubricated seals are normally the solution of choice.

When the going gets tough (pressure > 6 bar and speed > 2 m/s), the only solution we would recommended is a liquid-lubricated mechanical seal. Besides the operating limits, you need to consider other aspects as well such as service life, seal monitoring capability, air emissions (TA Luft) and explosion protection (ATEX). Table 1 shows an example of key selection criteria.

Enactus Industrial Co., Ltd offers sophisticated Agitator sealsCompressor sealsMarine seals, our company is a successful manufacturer and supplier, we have devoted ourselves to Machinery Seals many years, we will provide excellent service and competitive price for you, we are expecting to become your long-term partner in China.

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