• A105 Forged Carbon Steel Body: Constructed from integrally die-forged carbon steel complying with ASTM A105 standard, featuring a dense grain structure free of casting defects. Its mechanical strength is over 30% higher than that of cast steel, with excellent fatigue resistance and impact resistance, suitable for medium and high-pressure services with economical cost.

• Reduced Bore Design (12×10 inches): The valve has a nominal size of 12 inches (DN300) and a flow passage bore of 10 inches (DN250). The reduced bore design reduces valve weight by 25%–35%, operating torque by 20%–30% and manufacturing cost, while meeting flow requirements for most medium and large-bore process piping for improved economy.

• High Torque Output: Hydraulic actuation delivers torque exceeding 100,000 Nm, easily actuating the 12-inch large-bore valve and overcoming high operating forces under high pressure differentials.

• Adjustable Speed: Opening and closing speed is adjustable via throttle valves and accumulators, typically ranging from 15 to 120 seconds, preventing water hammer and pipeline surges.

• Smooth & Shock-Free Operation: Hydraulic fluid is incompressible, ensuring smooth and precise actuation without the shock and vibration associated with pneumatic drives.

• Pressure Loss Protection: Equipped with accumulators and hydraulic locks to maintain position or perform safe shutdown automatically in case of pressure failure.

• Local / Remote Control: Supports local manual operation, local hydraulic control, remote DCS control and Emergency Shutdown (ESD).

• Trunnion Mounting (For High Differential Pressure / Large Bore): The ball is secured by upper and lower trunnions, maintaining precise positioning in 12-inch large-bore and high differential pressure services, avoiding eccentric wear of sealing surfaces and ensuring long-term reliable sealing.

• Flanged Connection: Fitted with RF (Raised Face) or RTJ (Ring Type Joint) flanged ends conforming to ASME B16.5, facilitating integration with existing medium and large-bore piping systems and online maintenance.

Hydraulic Actuated Flanged 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.