CHINA J-VALVES Offers Various High-quality I ndustrial Ball Valves
J-VALVES, a distinguished professional ball valve manufacturer rooted in China, takes pride in its extensive product portfolio. Our offerings span a wide range, including trunnion-mounted ball valves, floating ball valves, high-temperature ball valves, high-pressure ball valves, metal-sealed ball valves, ultra-low temperature ball valves, DBB ball valves, Three-way And Four-way Ball Valve, and fully welded ball valves. Each product is a testament to our commitment to precision engineering and reliable performance. Meticulously crafted, they are designed to not only meet but exceed the most stringent industrial demands, ensuring stable operation even under extreme conditions. This enables us to provide our clients with high-value services and makes our valves widely sought-after in industries.
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Pressure Class: Class 150 ~ Class 2500 (PN20 ~ PN420)
Temperature Range: -196℃ ~ +425℃ (Standard); Optional high-temperature version up to +538℃
Materials:
Valve Body: ASTM A182 F304L (Forging) / ASTM A351 CF3 (Casting)
Ball: ASTM A182 F304L + ENP (Electroless Nickel Plating, thickness ≥25μm) or hard alloy coating
Valve Stem: ASTM A182 F304L with surface hardening treatment
Valve Seat: RPTFE / PCTFE / PEEK / Metal Hard Seal (STL Hardfacing)
Sealing Material: PTFE / Flexible Graphite / Metal Ring Gasket / Lip Seal
End Connection: Flange (RF / RTJ), Butt Weld (BW), Socket Weld (SW), Threaded (NPT/BSP)
Operation Mode: Manual (Lever / Worm Gear), Pneumatic, Electric, Hydraulic
Design Standards: ASME B16.34, API 608, API 6D (Large Bore)
Test Standards: API 598, ISO 5208, MSS SP-61
Leakage Class: ANSI/FCI 70-2 Class VI (Soft Seal) / Class V (Metal Seal)
Fugitive Emission: Compliant with ISO 15848-1 / TA-Luft; Stem leakage rate ≤50 ppm
Face-to-Face Dimension: Compliant with ASME B16.10 / API 6D standards
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J-VALVES
F304L Low Carbon Stainless Steel Material: The valve body is manufactured from ASTM A182 F304L forging with carbon content ≤0.03%. It delivers excellent resistance to intergranular corrosion, suitable for service conditions requiring no heat treatment after welding, and meets strict material requirements for chemical and nuclear power industries.
High-Performance Sealing Structure: Adopts a multiple sealing system consisting of main seat seal, auxiliary sealing ring and stem packing assembly, forming multi-layer sealing barriers to ensure zero-leakage performance across the full pressure range.
Precision Machined Ball: The ball is CNC precision machined with roundness ≤0.005 mm and surface roughness Ra ≤0.4 μm. It achieves high-precision matching with the valve seat for uniform sealing specific pressure, reaching ANSI/FCI 70-2 Class VI bubble-tight sealing level.
Spring Preloaded Seat Design: The valve seat adopts a spring preload structure to maintain constant sealing specific pressure under low-pressure conditions, ensuring reliable sealing under vacuum and low-pressure service.
Stem Dynamic Sealing System: The valve stem features a multi-layer sealing structure with V-type PTFE packing, graphite packing and disc spring preload, realizing long-term zero stem leakage and complying with EPA Method 21 fugitive emission requirements.
Anti-Static Device: Built-in anti-static springs and grounding unit ensure the resistance between ball, stem and valve body is less than 10 Ω, eliminating static accumulation risks and suitable for flammable and explosive media.
Anti-Blowout Stem Design: The integrally forged anti-blowout stem is fitted with bearing support to prevent stem ejection under abnormal pressure and ensure operational safety.
Fire Safe Design: Compliant with API 607 / API 6FA standards. The secondary metal sealing structure maintains tightness during fire incidents and prevents secondary disasters caused by medium leakage.
Optional Full Bore / Reduced Bore: Available in Full Bore and Reduced Bore designs. Full bore features low flow resistance and easy pigging; reduced bore provides better cost efficiency.
Actuator Interface: Equipped with ISO 5211 standard flange interface, compatible with manual lever, worm gear, pneumatic, electric and hydraulic actuators.
2-3 piece body
Full andreduced bore trunnion mounted
Double block and bleed
Single or double piston effect design anti-blow out stem
Anti-static device
Firesafe to AP1-607/6FA/IS0 10497 springloaded seats
Sealant in jection on request NACE MR-01-75
API Licenses:
API6D
API6DSS
API6A-PSL4
Pressure Class:
ASME 150-2500
API 2000-15000
Service Type:
Standard Temperature:-29℃ to 220℃/-20°F to 428°F
Low Temperature:-46℃ to 150℃/-50°F to 302°F
Cryogenic Temperature: -47℃ to -196℃/-52°F to-320°F
Subsea(Shallow &Deep Water)
Underground
High Temperature:Above 220℃/428°F
J-VALVES SPE 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 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) |
Emergency Seat Injection
Emergency grease in jection fitting forseat rings are standard for6" and larger valves and as option on sizes 2"-4".
An eedle valve, complete with non return check valve is screwed in the bodyand connected to theseatrings.
The emergency sealantinjection can temporarily solve leakage problems, seatsshall be re paired at the first opportunity.
For valves smaller than 6" seat sealant in jection fitting can beprovided in the body cavity
Body Vent & Drain
All J-VALVES SPE TMBV are complete with ascrewed NPT Plug, located in thelower side of the body completedraining of the body cavity.
For valves up to size 4"the drain and vent are combined in oneport.
Extended Stem
Extended stem is supplied for Underground in stalla tion.
The stem seals arelocated inthe body Gland Plate.
The stem extension isnot affected by eventual stem seal failure.
Double Piston Effect
Extended bonnets are available for Cryogenic or high temperature service or special applications requiring this facility features.
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