Mechanical seals, NIPPON PILLAR PACKING Co.,Ltd.

The dynamic pressure type non-contact gas seal (Phoenix seal) is a seal of which seal surface is uniquely grooved, to use the dynamic pressure effectively by the multi-barrier.
It is applicable to a wide range of applications from centrifugal compressor to the steam turbine and blower.

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■Features

◆Multi-groove type, assuring stabilized sealing performance
The divided multi-groove serves to maintain the desired parallelism between seal surfaces, and further to minimize the change in leak rate. Besides, the leak rate in this case is approx. 1/1000 of that for labyrinth seal, as the clearance between seal surfaces is minimal or several micrometers.

◆Minimized power consumption
Since the power is used only for shearing gas at seal area, the power consumption is extremely limited as compared with that of contact seal.

◆Space-saving cartridge type
The mechanical seal of this type is a cartridge type seal of which rotary side is integral with the static side, allowing the seal to be handled easily.

◆Applicable to rotation in both directions
Since the groove is bilaterally symmetric, it is applicable regardless of rotating direction.

■Performance

◆Type: PPG-1RB
•Maximum working pressure: 1.0MPa
•Peripheral speed: 15m/s (max.)

◆Type: PPG-3SB
•Maximum working pressure: 10.0MPa
•Peripheral speed: 150m/s (max.)

■Application

◆Turbine, blower