TS166T is equivalent to Flowserve/Pac-Seal type 21 and suitable for Apex centrifugal pumps. 



Trisun is a professional manufacturer of mechanical seals and OEM pump seals since 1998 and has branches in USA and Australia! Our seals are interchangeable with John Crane, Burgmann, AES, Flowserve, Fluiten, Roten, Sealtek etc.

TRISUN design advantages:








Competitors' inferior design and bad points:
- Offer less engagement
- Sharp stampings can damage the seal bellows
- Can be installed upside down at the seal manufacturer
- Competitor's tang and notch designs:
- Offer loose engagement
- Fewer points of contact with the seal outer shell
- May lead to broken tangs and seal bellows damage

After comparison, you will find our advantages and good quality!
Trisun is your reliable supplier!