• CU5MCuC Super Duplex Stainless Steel Material: The valve body is made of CU5MCuC (equivalent to UNS S32550 / F61 or similar super duplex stainless steel). It combines the advantages of austenitic and ferritic stainless steels, featuring extremely high strength, excellent resistance to chloride pitting and crevice corrosion, and superior stress corrosion cracking resistance. It is especially suitable for sour oil and gas service (acidic working conditions).

• Floating Ball Design: Under medium pressure, the ball can float freely and closely fit the downstream seat to achieve reliable sealing and ensure zero-leakage isolation.

• 2-piece or 3-piece Valve Body Structure: It facilitates on-line maintenance, inspection and replacement of internal parts, greatly reducing downtime and lowering the overall life-cycle cost.

• Flange Connection: Adopts RF (Raised Face) or RTJ (Ring Type Joint) flange connection complying with ASME B16.5 standard, ensuring compatibility and sealing reliability with oil and gas pipeline systems.

• Fire Safe Design: Compliant with API 607 / API 6FA standards. The valve can maintain sealing performance even under extreme conditions such as fire, preventing flammable medium leakage and protecting personnel and facility safety.

• Anti-static Device: Built-in anti-static spring and grounding device effectively prevent static accumulation and reduce fire and explosion risks in oil and gas environments.

• Blow-out Proof Stem Design: The stem adopts a top-mounted blow-out proof structure to guarantee operational safety under abnormal pressure conditions.

• ISO 5211 Top Flange Design: Standardized actuator interface for easy configuration of manual, pneumatic, electric or hydraulic actuators to realize remote automatic control.

• Compact & Lightweight Design: Small size and light weight allow easy installation and integration in space-limited sites such as oil and gas fields.

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.