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 Ratings: PN16, PN25, PN40, Class 150, Class 300, Class 600
Temperature Range: -196℃ to +100℃
Body: LCC (-46℃), CF8/CF8M (-196℃), F304/F316 (forged, -196℃)
Ball: CF8/CF8M, surface polished to Ra ≤ 0.4μm or HVOF tungsten carbide coated
Stem: 316 stainless steel, 17-4PH, qualified for low-temperature impact test
Seat: PCTFE (Kel-F), modified PTFE, UHMWPE, metal seat (Inconel alloy / Stellite alloy hardfacing)
Bearing: PTFE + stainless steel, RPTFE self-lubricating, metal bearing (for high-pressure and low-temperature service)
Packing: Pure graphite, Inconel wire-reinforced graphite, special low-temperature V-type PTFE composite packing
Extended Bonnet: CF8/CF8M stainless steel, length conforming to BS 6364
Handle / Gearbox: Stainless steel or low-temperature treated cast steel
End Connections: Flanged (RF/RTJ), Butt Weld (BW), Socket Weld (SW, for small sizes)
Operation: Manual (handle/gearbox with extended stem or stand), pneumatic (low-temperature type, double-acting / spring return), electric (low-temperature type, on-off / modulating), hydraulic
Design Standards: ASME B16.34, API 608, API 6D
Test Standards: API 598
Face-to-Face Dimensions: ASME B16.10
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J-VALVES
Bi-directional Sealing Design: Both upstream and downstream seats adopt independent elastic sealing structures. Regardless of the flow direction of the medium, bubble-tight sealing (ANSI/FCI 70-2 Class VI) is achieved. There is no restriction on installation orientation, simplifying pipeline design and on-site construction.
Body: ASTM A352 LCC (-46°C), CF8/CF8M (-196°C), A182 F316/F304 (forged, -196°C). All materials pass the -196°C low-temperature impact test (Charpy V-notch impact energy ≥ 27 J).
Ball/Stem: F316/F304 stainless steel with excellent low-temperature toughness to prevent cold brittleness fracture.
Seat Sealing: PCTFE (Kel-F), modified PTFE, ultra-high molecular weight polyethylene (UHMWPE), retaining elasticity and sealing performance at -196°C.
Packing: Pure graphite, Inconel wire-reinforced graphite, which does not harden or shrink at low temperatures.
Extended Low-Temperature Bonnet: The bonnet is extended above the seat to keep the stuffing box area away from the low-temperature medium. The temperature gradient ensures the packing operates above 0°C, preventing stem icing and operational sticking. Extended dimensions comply with BS 6364 / ISO 28921-1.
Floating Ball Design (≤ 2"): Simple structure, low cost, and reliable sealing under medium and low pressure conditions.
Trunnion-Mounted Design (≥ 2.5"): Precise ball positioning, suitable for high pressure differential and large bore applications, avoiding sealing failure caused by low-temperature shrinkage.
Optional Vacuum Insulation Layer: Vacuum jacket or polyurethane foam insulation layer is available for the bonnet and body to reduce cold loss, prevent external surface frosting and personnel frostbite.
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-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 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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