BT81 PTFE Bellow seals

Seal Type BT81 / BT82R

The Type BT81 / BT82R PTFE Bellow seals are outside mounted with simple installation procedure and hence cost-effective solution for highly corrosive media. The outer-end of the seal bellows is clamped to the shaft or sleeve surface. All Metal Components are including springs are Protected from Media. PTFE bellow mechanical seals are robust, chemically resistant, and versatile sealing solutions for Non-Metallic pumps In Industries dealing with highly corrosive media. The Type BT81 has been designated as Fixed and Not replaceable face & The Type BT82R replaceable bellow face Insert respectively and there is flexibility for selection of face material as per the media to be sealed, which can be easily removed & replaced to handle a wide range of corrosive and abrasive media.

Features :
  • Non-Pusher Bellow Seal.
  • Single outside mounted.
  • Independent of Direction of rotation
  • Variant with Silicon carbide faces for highly abrasive Media (BT82R)
Operating Limits :
  • Shaft Dia. : 19mm to 100mm
  • Pressure : UP to 15BAR 
  • Temperature : -20°C to +250°C
Material :
  • Seal Face : Carbon/SIC/GFT
  • Seat Face : SIC/Ceramic
  • Bellow : GFT, PTFE
  • MOC : SS 316, other Material on request.
Application :
  • Petrochemical Industry.
  • Chemical industry.
  • Refinery Technology
  • Highly Corrosive Media.
  • Pharmaceutical Industry.
  • Horizontal and Vertical Pumps