Model

 Seat Material

 Feature & Application

 TSD
 (Soft Seated)

 Virgin TFE

 Tight Shut-off, Bi-directional,
 High Chemical resistant,
 Recommended up to 150¡É,
 Not desirable for CL.600

 Glass filled TFE
 (RTFE)

 Tight Shut-off, Bi-directional,
 Recommended up to 180¡É,
 Good Chemical resistant
 Low temperature steam

 UHMWPE

 Tight Shut-off, Bi-directional,
 Recommended up to 120¡É,
 Low Temperature & Abrasive service

 Modified Teflon
 (MTFE)

 Tight Shut-off, Bi-directional,
 Recommended up to 200¡É,
 Low pressure Saturated Steam
 Low Temperature
 High Chemical resistant at high Temperature
 Standard material for CL.600

 Carbon Modified Teflon
 (CMTE)

 Tight Shut-off, Bi-directional,
 Recommended up to 230¡É,
 High pressure Saturated Steam
 Optional material

 TMD
 (Metal Seated)

 SS304 & SS316

 Fire safe design, Uni-directional,
 Recommended up to 200¡É,
 Hot Oil & Water,
 Used with a Nickel plated Disc
 Leakage Class IV

 Inconel

 Fire safe design, Uni-directional,
 Applicable up to 540¡É,
 High Temperature Service
 Used with a Stellited Disc
 Leakage Class IV

 Alloy Steel

 Fire safe design, Uni-directional,
 High Chemical resistant at high Temperature
 Leakage Class IV

 TFD
 (Fire Safe)

 Soft Seat + Metal Back-up Seat

 Tight Shut-off,
 Fire Safe design,
 Recommended up to 200¡É but determined by Soft  seat material,
 Steam service