Product - Springless

​​​Springless Top Entry Ball Valves​​

IMI Truflo Rona Top Entry Ball Valves are designed and manufactured to meet the most stringent requirements in all critical applications for the oil & gas, chemical & petrochemical industries, PTA (Purified Terephtalic Acid) plants, Liquified Natural Gas plants, LNG Carriers and LNG Terminals. Our Springless Top Entry Ball Valves feature the unique “Springless Wedge Design”.

​Key features

  • Top entry allowing in-line maintenance 
  • Trunnion mounted design
  • Wedge access design
  • Bi-directional tight shut-off
  • Bi-directional fire safe
  • Self leveling seats
  • Anti-blowout stem
  • Wide range of sealing combinations
  • Anti-static device
  • Variety of end connections


  • Exclusive Wedge-Seat Design
    • Seats are self-adjusting, assuring leak-tight closure under all operating conditions and valve orientations.
    • Automatic compensation for changes that occur as a result of varying pressure, temperature and wear.
    • Sealing elements are kept in tight contact with the ball to assure an even load on the seats at all pressures, temperatures and at all stages.
    • Ball is wiped clean each time the valve is operated.
    • Ball-seat contact is constantly maintained, extending seat life.
  • Minimal number of components
  • Top-Entry configuration allows fast, easy, in-line service and permits emergency situations to be safely and quickly resolved
  • All working parts are accessible for service
  • No special tools or training required for maintenance and repair


Liquidation of Natural Gas    

Process fluids


Steam / geothermal steam

Hot gas / sour gas (NACE)

Oxygen / hydrogen

Blow down

Sulphur recovery

Acid / caustic / chloride

Abrasive service​


Our Top Entry Ball Valve fully integrated 
into the high pressure unloading arm for
LNG Floating Storage Regasification Unit


In-house full range cryogenic testing​

Product specification & dimensions

Size range

API 6D/6DSS 1/2” through 24”

API 6A 1-13/16” > 13-5/8”

DN DN12 > DN 1500

Pressure range

ANSI Class 150 > 4500 

API Rating 2000 > 20000 

PN Rating PN16 > PN420

Temperature range

-196°C to +650°C

-385°F to +1200°F

End Connection

ANSI flanges ANSI B16.5 / ANSI B16.47

Compact flanges NORSOK L-005

Special flanges Designed as required

Hubs All major hub end design available

Welding ends Butt or socket welding ends with or without pup pieces






Stainless steel


Super duplex







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Product - Springless