• High‑Grade Stainless Steel Construction:The valve body is precision‑cast from CF8 (304) or CF8M (316) austenitic stainless steel, delivering excellent resistance to general and intergranular corrosion. The 316 grade contains molybdenum, providing superior resistance to chloride pitting and crevice corrosion, making it suitable for harsh chemical environments.

• Full Bore Design:The DN100 nominal bore matches the inner diameter of the pipeline, featuring low flow resistance (high Kv value) and low pressure drop. It facilitates pipeline pigging and cleaning operations, improves system delivery efficiency, and reduces pumping energy consumption.

• Floating Ball Structure:The ball can slightly displace under medium pressure and tightly contacts the downstream seat to achieve a reliable seal. With a simple structure and excellent sealing performance, it is suitable for medium‑ and low‑pressure applications. The bidirectional sealing design allows unrestricted installation orientation.

• DIN Standard Flanged Connection:Equipped with flanged connections conforming to DIN EN 1092‑1 Type 11 B1 (raised face), with pressure ratings PN16/PN25/PN40 available. It fully matches European and global DIN standard piping systems, ensuring high installation interchangeability.

• Fire‑Safe Design:Compliant with API 607 / ISO 10497 standards. In the event of soft seat burnout, the metal seat engages with the ball to form a metallic seal, preventing massive medium leakage during fire incidents and ensuring safety.

• Anti‑Static Device:A conductive spring is installed between the stem, ball, and valve body to ensure effective static dissipation, with electrical resistance < 10Ω. This prevents sparking caused by static buildup, making it suitable for flammable and explosive media.

• Blowout‑Proof Stem Design:The bottom‑entry stem is equipped with an anti‑blowout shoulder. Even if the packing gland accidentally loosens, the stem remains retained by the valve body, protecting personnel and equipment safety.

• Low Operating Torque Design:The contact surfaces between the ball and seats are precision‑machined to a surface roughness Ra ≤ 0.4μm. Combined with high‑performance lubricants and low‑friction seat materials, operating torque is significantly reduced. The DN100 size is fitted with a worm gear drive for effortless operation.

• ISO 5211 Actuator Mounting Pad:The top of the stem features a mounting flange conforming to ISO 5211, allowing direct installation of pneumatic, electric, and hydraulic actuators to support system automation upgrades.

• Compact & Lightweight Design:Compared to gate valves and globe valves of the same size, ball valves feature a compact structure and light weight, saving installation space and piping support costs.

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.