• F316 Forged Stainless Steel Material:The valve body is integrally machined from ASTM A182 F316 forged steel, featuring a dense grain structure free of casting defects. It combines excellent corrosion resistance, high-temperature strength and mechanical properties, making it suitable for highly corrosive, high-temperature, high-pressure and alternating load applications.

• Trunnion Mounted Ball Design:The 6" large-bore ball is supported and fixed by upper and lower trunnions. Initial sealing is achieved by spring-loaded seats, with medium pressure further enhancing the sealing effect. Operating torque is significantly lower than that of floating ball designs, preventing seal failure caused by ball displacement under extreme pressure differentials in high-pressure service, ensuring smooth and controllable opening and closing.

• 3-Piece Forged Structure:The valve body consists of a main body and two end caps, facilitating internal component maintenance and replacement. The forged structure provides much higher pressure-bearing capacity than castings, meeting the requirements of 2500LB ultra-high pressure rating.

• Metal Hard Sealing Structure:The ball and seats are hardfaced with Stellite alloy, nickel-based alloy or tungsten carbide, offering high temperature resistance, wear resistance and erosion resistance, with durable and stable sealing performance, suitable for high-temperature, high-pressure and solid particle-laden media.

• Flanged Connection:RTJ (Ring Type Joint) flanged connection conforming to ASME B16.5. The 2500LB pressure class ensures reliable sealing under ultra-high pressure conditions.

• Fire-Safe Design:Compliant with API 6FA standard. Metal seals and graphite packing maintain sealing integrity in case of fire to prevent catastrophic leakage.

• Anti-Static Device:Built-in anti-static spring and conductor ensure electrical continuity between the ball, stem and valve body, reducing explosion risks.

6"2500LB F316 Stainless Steel Trunnion Mounted Ball Valve 3D Diagram

J-VALVESSPE can supply a range ofseat types and configurationsto meet specific process needs:

J-VALVES trunnion mounted ball valves standard seat ringsare soft-seated by the use of athermoplastic or elastomeric or Meta

Seats-Tungsten /Chrome carbide /ENP

Single Piston (SPE) , Double Piston effect (DPE) and Combination (SPE x DPE) seats are available.

Seat Princlple

Two independent seat rings grant the sealing, barrieragainst the line pressure actingon the upstream and downstreamsides of the valve which allows the valve tobe bidirectional.

A set ofcoil springs acting, between the upstream side ofeach seatring,andthe body,generate an uniform thrust on theseat which push the same against the ball and grant the sealingfeature with no orverylow pressureinthe line,when the line pressure increasethe thrust actingon theseat increases proportionally and the sealing leatureis granted throughout the fullpressure range.

The J-VALVES SPE trunnion mounted ball valves are available with Double

Block & Bleed in dependent oftheseat type.

Valve seating variations

Seat Design	Single piston effect (SPE)	Double piston effect(DPE)-DIB 1	Combined DIB 2
Bi-directional sealing	Yes	Yes	Yes
Body-Cavity Self relieving	Yes	No	Yes
Double Barrier	No	Yes	Yes (preferred direction only)

Single Piston Effect

Single piston effect (SPE) is the stand ard feature for theseat rings of the J-VALVES SPE trunnion mounted ball valves.

On a SPE seat ring:

The pressure ac tingon the upstream side ofthe seat ringgenerates aforce which push theseattowards the ball.The pressure actingon the downstream side ofthe seatring generates a force which pull theseatring away fromthe ball.

Anyoverpressure which may be generated by the thermal expansion of the fluid trapped in thebodycavity with the ballin fully closed position, will beautomatically dischargedinthe line on the lower pressure side.

Double Piston Effect

Double piston effect(DPE) is a stand ard feature fortheseat rings ofthe J-VALVES trunnion mounted ball valves & recommended forwelded body valves. Ona DPE seat ring, both the pressure acting on the upstream sideof theseatring andthe pressure acting on thedownstreamside of the  seatring, generatea forcewhich push the seattowards the ball.

With th is type ofseat ring,the eventual over press ure whichmay be generated by the thermal expansion ofthe fluidtrappedinthebodyeavitywith theball in fullyclosed position,can be discharged by the use of:

An external safetyrelief device.

The Double Piston Effect grants a double sealingfeature,iftheupstreamseat ringisdamaged, thedown stream seatgrant the sealingfeature of the valve.