Brand:TWT
Model:900 Series
Triple offset design eliminates abrasion of sealing joint faces
and maintain complete sealing and longer service life.
Patented elastic metal sealing ring produces uniform compression
when valve disc contacts with sealing ring to achieve elastic comp-
ensation and high-performance bi-directional sealing.
Wide-angle valve seat design eliminates abrasion and deformation
produced from excess extrusion of valve seat and disc seal; 360°C
round-edge sealing profile design for valve disc ensures maximum
flow and corresponding percentage control.
Solid valve shaft provides stable support for valve disc.
Adjustable flange gland seal packing prevent against uneven
distribution of seal packing, and packing is TFE (450°F) and
graphite (900°F).
Valve seat is hardened alloy that can endure severe environment,
and disc sealing face is with high temperature and abrasion resistance
even more, multi-layer elastic sealing can subject to 528°C high-
temperature sealing.
Elastic sealing conforms to API598 elastic seating liquid and gas zero-
leakage sealing standard to ensure air-tight sealing.
Low-cost maintenance, self-centering disc design adjusts temperature
and heat circulation to make disc not too tight; and loading protective
ring protects hard matters from contacting with the surface subjected
to load.
Detonation-proof valve shaft design conforms to API609 standard to
enhance safety of operators.
Technical conditions and materials
Standard valve test conforms to MSS-SP-61and ASME/FCI 70-20
API-598 inspection can be done for grade per request
Applicable temperature: -29°C~450°C
Applicable size DN50~DN5500
Valve body carbon steel/stainless steel
Valve disc carbon steel/stainless steel
Valve stem carbon steel/stainless steel
Sealing ring stainless steel




