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Working Principle
The Plan21 system works by diverting the pump's discharge medium through a flow restrictor and cooler. This process limits flow, reduces pressure and lowers temperature before the medium enters the seal chamber. This action cools and lubricates the mechanical seal, prevents medium vaporization, and vents air and steam from the seal chamber, thereby enhancing seal reliability and service life.

Applicable Conditions
Plan21 is suitable for clean, non-polymerizing media. It increases steam vaporization margin, meets temperature limits of secondary sealing elements, reduces coking or polymerization, improves seal lubricity, and minimizes flashing, gas introduction (in vacuum conditions), cavitation, dry running, high temperature, and corrosive media situations.


Advantages
1. Cooling and lubrication: Introducing cooled medium effectively reduces seal chamber temperature and provides good lubrication, decreasing friction and wear.
2. Vapor prevention: Venting air and steam from the seal chamber prevents medium vaporization, enhancing seal stability and reliability.
3. Broad applicability: Suitable for various high-temperature, high-pressure, and corrosive conditions, meeting diverse industrial needs.
4. Extended service life: Improved working conditions for the seal prolong its life, reducing maintenance costs and downtime.

Application Fields
Plan21 is widely used in industries such as oil, chemical, rubber, polyethylene, polypropylene, polyester, PTA, and coal chemical engineering, offering reliable sealing solutions for machinery.

In conclusion, Plan21 is an effective mechanical seal flush plan. Its well-designed flushing and cooling system significantly boosts mechanical seal performance and longevity, providing robust technical support for various industrial applications.