• F316 Austenitic Stainless Steel Material:The valve body is forged from ASTM A182 F316 (0Cr17Ni12Mo2) steel with a molybdenum content of 2–3%. It exhibits significantly better resistance to pitting corrosion, crevice corrosion and chloride stress corrosion than 304 stainless steel, making it suitable for seawater, sour oil & gas and chemical corrosive environments.

• Forged Integral Structure:The valve body is fully machined from a single forging, featuring a dense grain structure free of casting defects. Its pressure-bearing capacity and fatigue life are remarkably superior to castings, making it especially ideal for 1500LB ultra-high pressure pulsating service conditions.

• Three-Way Reduced Bore Design:The 0.75″ inlet × 0.5″ × 0.5″ dual outlet (or reverse converging) structure enables one-inlet two-outlet distribution or two-inlet one-outlet convergence of high-pressure media. The reduced bore design lowers weight, operating torque and cost, suitable for high-pressure piping systems with limited space.

• Floating Ball Self-Energized Sealing:The ball floats freely under medium pressure and forms a self-energized seal by tightly contacting the downstream seat. Sealing performance becomes more reliable under 1500LB ultra-high pressure, with a simple structure and sensitive response.

• Double Block & Bleed (DBB) Function:Equipped with two independent seats to achieve bi-directional sealing and isolation. A bleed/drain valve is installed in the valve body cavity, supporting online pressure relief and seal integrity testing, meeting API 6D isolation requirements.

• Threaded / Socket-Weld / Butt-Weld End Connections:Optional NPT female threaded, SW socket-weld or BW butt-weld ends in compliance with ASME B16.11 / B16.25 standards, ensuring high connection reliability under 1500LB ultra-high pressure.

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

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.