• C95500 Nickel Aluminum Bronze Valve Body: Precision-cast from ASTM B148 C95500 aluminum bronze. The aluminum, iron and nickel elements form a dense aluminum oxide protective film, resulting in a seawater corrosion rate only 1/50 that of carbon steel. Its resistance to cavitation erosion and scouring corrosion far exceeds that of stainless steel and duplex stainless steel. Nickel further enhances corrosion resistance and strength, making it suitable for long-term immersion in seawater environments.

• 4-inch Standard Bore: DN100 nominal diameter is suitable for medium-flow medium delivery. The full-bore design features extremely low flow resistance, facilitating pipeline cleaning and pigging operations. Reduced bore is available for optimized cost efficiency.

• Class 150 Low-Pressure Rating: Class 150 (PN20) pressure class with a maximum working pressure of 1.96 MPa at ambient temperature, suitable for medium and low-pressure piping systems such as seawater, cooling water and fire water.

• Floating Ball Design: The ball floats freely under medium pressure and forms a reliable seal by tightly fitting against the downstream seat. It features a simple structure, quick opening and closing, and low operating torque, ideal for Class 150 low-pressure service.

• ANSI Standard Flanged Connection: Adopts RF (Raised Face) flanged ends complying with ASME B16.5, enabling easy integration with North American and global ANSI-standard piping systems with high installation interchangeability.

• Bi-Directional Sealing Design: Independent upstream and downstream seats provide bi-directional sealing with no restriction on installation orientation, simplifying piping design and on-site construction.

• Enhanced Seat Sealing: EPDM, NBR or FKM is available for the seat, offering resistance to seawater penetration and biofouling. Paired with the C95500 ball, it achieves bubble-tight sealing. PTFE/RPTFE is optional for improved chemical resistance.

4"150LB C95500 Flanged Floating 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.