Metal Seated Trunnion Ball Valve

Metal-seated trunnion ball valves are resistant to abrasion, erosion, corrosion, solids, and high temperatures up to 640℃. Special metal-seated ball valves are available in high pressure, big size, top entry, etc.

The metal seated ball valve leakage rate meets the highest standard of EN-12266, ISO 5208, ANSI FCI 70. 
There is wide selection of coating materials, such as Chrome Carbide (CrC), Hard Chromium (HCr), Tungsten Carbide (WC-Co), Cobalt Based Alloy, and Stellite 6 etc.

Relia’s scraper seat is ideal for most difficult applications where build-up of damaging fluid deposit may occur on the ball face. 

Temperature Range
Pressure Rating
Class 150~2500

Features and Benifit

Corrosion / Erosion Resistance

  • Extend the life of metals with a wide selection of surface coatings, available for valve internal / externals. These coatings include Teflon, chrome, electroless nickel, zinc phosphate,tungsten carbide galvanizing & many more options.

Ball & Seats

  • Mate-lapped for 100% sealing contact
  • Ensures absolute shutoff per ANSI classification
  • Corrosion resistant
  • Seats are protected from flow in open / closed position
  • Seats are available as field replaceable sets

Seat Spring

  • Assisted by line pressure, provides a constant mechanical force on ball against seat to maintain a tight seal

Body Gasket

  • Encapsulated spiral wound body seals guarantee zero leaks to the surrounding area.
  • Lowers contact stresses



  • Cast Steel Metal Seated Trunnioin Mounted Ball Valve

cast steel metal seated trunnion ball valve


  • Forged Steel Metal Seated Trunnioin Mounted Ball Valve

forged steel metal seated trunnion mounted ball valve

Typical Material

Item Part Name Material
Cast Steel Forged Steel
1 Body A216 WCB ASTM A105
2 Ball F316+TCC
3 Seat F316+TCC
4 Stem XM-19
5 Stem packing Graphite
6 Body Seal 1 Graphite
7 Body Seal 2 Graphite
8 Seat spring Inconel X-750


Seat Models 

seat models for metal seated ball valve


Stem Extentions

stem extension for metal seated ball valve

Leave Us Your Info

Could you please kindly fulfill the following information when enquiring:

Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)