• Forged Stainless Steel Valve Body:Manufactured from solid die-forged austenitic stainless steel conforming to ASTM A182 F304/F316/F316L, featuring a dense grain structure, free from casting defects, and offering superior mechanical strength over cast steel. Grade 316 contains 2%–3% molybdenum, providing excellent resistance to chloride pitting, crevice corrosion and intergranular corrosion, making it suitable for sour, chlorinated and marine environments.

• Reduced Bore Design (6" × 4"):The valve has a nominal size of 6" with a 4" bore. This reduced bore design reduces valve weight by 30%–40%, operating torque by 25%–35% and manufacturing cost, while meeting flow requirements for most process pipelines and improving economic efficiency.

• 2500LB Ultra-High Pressure Class:Class 2500 (PN420) pressure rating, with a maximum working pressure of 42.0 MPa at ambient temperature, suitable for extreme conditions including ultra-high pressure natural gas gathering and transportation, hydrocracking and supercritical power generation.

• Trunnion-Mounted Ball:The ball is secured in the valve body bearings via upper and lower trunnions, maintaining precise positioning under ultra-high differential pressure and fluctuating temperatures to prevent uneven wear and deformation of sealing surfaces, ensuring long-term reliable sealing.

• Double Piston Effect Seat (DPE):Standard DPE seat design delivers bidirectional double sealing, with cavity pressure supported by both upstream and downstream seats, ideal for ultra-high pressure pipelines and critical isolation services where leakage is prohibited.

• ANSI Standard Flanged Connection:Equipped with RF (Raised Face) or RTJ (Ring-Type Joint) flanged connections complying with ASME B16.5, enabling easy integration with North American and global ANSI standard piping systems. The RTJ ring groove ensures reliable metal sealing under ultra-high pressure.

ANSI 2500LB Ss Flanged 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.