• CF8 Stainless Steel Body: Precision-cast from ASTM A351 CF8 (304) austenitic stainless steel, offering excellent resistance to uniform corrosion and intergranular corrosion. With high surface finish, it meets general hygienic requirements and is suitable for water, steam, petroleum products and various chemical media.

• Pneumatic Actuator: Equipped with double-acting or spring-return pneumatic actuator, operating at air supply pressure of 0.4–0.7 MPa, enabling fast opening and closing (typically 1–3 seconds) and remote automatic control. Proportional modulation is supported via a 4–20mA positioner.

• 3-Way Flow Function: Integrates three ports in a single valve to achieve media diversion, mixing or flow direction switching. It replaces conventional multi-valve assemblies, simplifying piping layout while reducing leakage points and installation space.

• L-Port Ball (90°): Enables flow switching between two ports, ideal for flow direction selection or on-off control.

• T-Port Ball (90°/120°): Permits flow division, mixing or any two-way connection among three ports, suitable for media blending, distribution or bypass control.

• European Standard Flanged Connection: Flanged connection conforming to DIN EN 1092-1 Type 11 B1 (Raised Face), PN16 pressure class. The standard matches European and global DIN piping systems, ensuring high installation interchangeability.

• Bi-Directional Sealing Design: Independent seats are provided at each sealing position. Bi-directional sealing guarantees reliable isolation between ports, with leakage rate up to ANSI/FCI 70-2 Class VI (bubble-tight).

• Fire-Safe Design: Compliant with API 607 standard. In the event of fire damage to soft seats, metal seats contact the ball to form a metallic seal, preventing media leakage during fire incidents.

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.