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Shop No 150/3 Attawa Sector 42-B, Chandigarh, India 160036

TriO Triple Offset

Series 4 TriO Triple Offset


  • ISO 5211 top plate for direct mounting of a wide range of actuators and gears
  • Seal ring retainer, made of identical metal as the disc, clamps and combines the seal ring rigidly on the disc face into a robust, composite unit
  • Standard hard faced Stellite seat integral to body
  • Robust single piece stem
  • Live-loaded stem seal system by a set of Belleville springs. Rocker shaped gland bridge compensates for uneven adjustment of gland bolts
  • SS316+Nitriding bearings with graphite rings designed to take high radial and axial stem loads, and for ingress protection
  • One piece body
  • Replaceable laminated seal ring is located on the disc, precision machined for bi-directional sealing


Default firesafe design and NACE versions available.

Body Type Wafer, Lug, Double Flanged, Buttweld
Body CS, SS
Disc WCB, CF8M, CF8
Stem 316 SS, 410 SS, 17-4 PH, XM-19
Seat Stellite Gr.21
Seal Ring S31803+Graphite, XM 19+Graphite, Inconel 625+Graphite, Solid Metal Seat
Size Range Series 4A, 4B, 4C, 4W – 3″ to 48“ (DN 80 to 1200)

Series 4D, 4E, 4F, 4Y, 4G, 4H, 4J, 4K

– 3″ to 24“  (DN 80 to 600)

Pressure Rating Series 4A, 4B, 4C, 4W – Class 150

Series 4D, 4E, 4F, 4Y – Class 300

Series 4G, 4H, 4J, 4K – Class 600

Design Standard API 609 Category B, BS EN 593
Testing Standard API 598, BS EN 12266-1
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