• Designed to American Standards (ASME/ANSI/API):Strictly manufactured in accordance with American standards including ASME B16.34, API 608, ASME B16.5, and ASME B16.10. Flange dimensions, face-to-face lengths, and pressure-temperature ratings are globally recognized, ensuring full compatibility with projects in North America and those adopting international standards.

• Type L (Flow Direction Switching):90° rotation enables switching between two flow directions, ideal for flow selection applications.

• Type T (Flow Diverting / Mixing):90° or 180° rotation allows flow diversion, converging, or straight-through operation, suitable for proportional control and circulation systems.

• High-Platform ISO 5211 Design:The top of the valve stem is directly machined with a mounting flange conforming to ISO 5211. Actuators (pneumatic, electric, hydraulic) can be directly bolt-mounted without traditional brackets and couplings. Overall height is reduced by more than 30%, with significantly improved rigidity and alignment, eliminating operating failures caused by bracket deflection.

• Flanged End Connections:RF (Raised Face) or RTJ (Ring Type Joint) flanges comply with ASME B16.5. Bolted connections facilitate installation and removal, ensuring high interchangeability with global piping components.

• Floating Ball (Typical for ≤2" / DN50):Media pressure pushes the ball against the downstream seat, featuring a simple and economical structure suitable for medium and low-pressure services.

• Trunnion Mounted Ball (Optional for ≥3" / DN80):The ball is secured by trunnions with spring-loaded seats, designed for high-pressure and large-bore applications.

• Precision Ground Ball and Flow Passage:The ball and flow passage are precision-machined with smooth rounded transitions, resulting in low flow resistance and no turbulence. Surface roughness Ra ≤ 0.4 μm, ensuring tight precision sealing with the seat.

• Resilient Seat Sealing:Standard RPTFE seats (-29℃ ~ +180℃). Optional PTFE, PPL, PEEK, and metal seats are available to suit various temperatures and media characteristics.

• Anti-Static and Fire-Safe Design:Conductive connections between the stem, ball, and body dissipate static electricity. Certified to API 607 for fire safety, maintaining sealing integrity after fire exposure.

• Blowout-Proof Stem and Live-Loaded Packing:The stem is designed with a lower anti-lift shoulder. Disc spring-loaded packing automatically compensates for relaxation caused by thermal cycling, ensuring long-term reliable sealing.

• ISO 5211 Actuator Mounting Pad:Top flange conforms to ISO 5211 (F03 / F05 / F07 / F10 / F12 / F14), directly matching pneumatic, electric, and hydraulic actuators to support remote control and automation.

• Position Indication and Locking:Actuators or levers are equipped with position indicators and locking devices for easy status monitoring and prevention of misoperation.

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.