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TYPE 21L

Direct replacement for John Crane Type 2. Non-clogging single-coil spring. Bi-directional elastomer bellows seal. Pressure up to 10 bar.

About this Product

The "JC2" designation is not a specific Sealergy Seals product, but it refers to a mechanical seal that is designed to be a direct replacement for the John Crane Type 2 mechanical seal. The John Crane Type 2 is a single, unbalanced, elastomer bellows seal that is a common industry standard. It is known for its robust and flexible design, making it a reliable choice for general-purpose applications. The JC2 is a highly adaptable seal suitable for a wide range of rotary equipment, including pumps, mixers, and compressors. The flexible elastomer bellows allow the seal to compensate for minor shaft misalignments and end-play, ensuring consistent performance. The seal features a non-clogging, single-coil spring that provides reliable sealing and is less susceptible to failure from solids or debris in the fluid. The bellows design also protects the shaft from wear and scoring. As a widely recognized industry standard, the JC2 is easily interchangeable with seals from many other manufacturers. This simplifies procurement and replacement, reducing downtime and maintenance costs. The simple and robust design of the JC2 makes it a durable and economical choice. It provides a long service life with minimal maintenance, which can lead to lower total costs over time compared to more complex sealing solutions.

Technical Features
  • Pressure: The maximum pressure such as up to 6 bar (87 psi) or 10 bar (150 psi).
  • Unbalanced.: Yes
  • Non-clogging single spring.: Yes
  • Bi-directional.: Yes
  • Elastomer bellows.: Yes
Standard Sealface Combinations
Rotary FaceStationary FaceComplete Seal Code
Regular CarbonCeramicCV
Resin CarbonSilicon CarbideRV
Silicon CarbideSilicon CarbideQQ
Tungsten CarbideTungsten CarbideUU
Elastomer Temperature Capabilities
MaterialMinimumMaximum
High Nitrile / Bhuna-N-30°C120°C
EPEM-40°C140°C
Viton/FKM-30°C180°C
Dimensional Data

Dimensions

No dimensions available.

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