Fully Welded Ball Valves – 2"–56" for Gas Trunk Pipelines
J-VALVES fully welded ball valves from 2" to 56", Class 150 to 600, are built for zero-leakage, maintenance-free service on natural gas trunk pipelines, city gate stations and underground (buried) installations. API 6D designs with fire-safe construction to API 607, trunnion mounted, and available with electric or gas-hydraulic actuation for remote operation.
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Size Range: 2″ to 60″ (DN50 to DN1500)
Pressure Class: 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel), A350 LF2 (low-temperature steel), A694 F52/F65 (high-strength line pipe steel), A182 F316 (stainless steel)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: A105 with surface hardening or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE/RPTFE (-46℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal with flexible graphite (-46℃ ~ 650℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW compatible with base materials, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt-weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Gas-Hydraulic (preferred); optional pure pneumatic, electric, electro-hydraulic actuator
Supply Air Pressure: 0.5~1.0 MPa (pipeline natural gas or nitrogen)
Operating Time: Fully open / fully close adjustable within 5~30 seconds; emergency shutdown < 10 seconds
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face Dimensions: ASME B16.10Brand:J-VALVES -
Nominal Size: 12″ (DN300)
Pressure Class: 300LB (PN50)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel); optional A350 LF2 (-46℃ low-temperature steel) or A182 F316 (stainless steel upgrade)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: Surface-hardened A105 or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE / RPTFE (-29℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal + flexible graphite (-29℃ ~ 425℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW matching base material, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Electric (multi-turn / quarter-turn, preferred); optional pneumatic, pneumatic-hydraulic, manual
Power Supply: 380V / 220V / 24V AC or DC, custom voltage available upon request
Ingress Protection: IP67 / IP68 (outdoor / subsea); explosion-proof type Ex d IIB T4 available
Control Mode: On-off type (ON/OFF), modulating type (4-20mA proportional control), intelligent type (fieldbus communication)
Operating Time: Fully open / fully close adjustable from 15 to 120 seconds (depending on torque and motor power)
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face: ASME B16.10Brand:J-VALVES - Nominal Size: 12″ (DN300)
Pressure Class: 300LB (PN50)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel); optional A350 LF2 (-46℃ low-temperature steel) or A182 F316 (stainless steel upgrade)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: Surface-hardened A105 or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE / RPTFE (-29℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal + flexible graphite (-29℃ ~ 425℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW matching base material, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Electric (multi-turn / quarter-turn, preferred); optional pneumatic, pneumatic-hydraulic, manual
Power Supply: 380V / 220V / 24V AC or DC, custom voltage available upon request
Ingress Protection: IP67 / IP68 (outdoor / subsea); explosion-proof type Ex d IIB T4 available
Control Mode: On-off type (ON/OFF), modulating type (4-20mA proportional control), intelligent type (fieldbus communication)
Operating Time: Fully open / fully close adjustable from 15 to 120 seconds (depending on torque and motor power)
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face: ASME B16.10Brand:J-VALVES -
Nominal Size: 2" to 56" (DN50 to DN1400)
Pressure Class: 150LB to 2500LB (PN16 to PN420)
Temperature Range: -29℃ to +425℃
Body/Ends: ASTM A105, A350 LF2, A694 F52/F65, A182 F304/F316/F51, etc. (forged or pipe)
Ball: Material matching the body, with hard chrome plating or nitriding treatment
Stem: 17-4PH, 316, F51 and other stainless steels
Seat: PTFE, RPTFE, PEEK, Nylon (auxiliary seal); primary seal is metal seal (with Stellite hardfacing)
Sealing Materials: Graphite packing (stem seal), metal-to-metal seat seal (primary seal)
Bearing/Shaft: 440C stainless steel with self-lubricating bearings, or Inconel alloy
Extended Stem: Material matching the body or stainless steel, length customized according to burial depth
End Connection: Butt Weld Ends (BW, conforming to ASME B16.25 / EN 12627)
Operation: Manual (worm gear / bevel gear with bearing torque reduction), pneumatic, electric, hydraulic, electro-hydraulic actuator (for underground installation with above-ground operation)
Design Standard: API 6D, ASME B16.34
Test Standard: API 6D
Face-to-Face Dimension: Conforms to ASME B16.10Brand: -
Nominal Bore: 2" to 56" (DN50 to DN1400)
Pressure Class: PN16 to PN420 (150LB to 2500LB)
Temperature Range: -29℃ to +425℃
Body / End Connections: ASTM A105, A350 LF2, A694 F52/F65, A182 F304/F316/F51, etc. (forged or steel pipe)
Ball: Material matching the valve body + hard chrome plating or nitriding treatment
Stem: 17-4PH, 316, F51 and other stainless steels
Seat: PTFE, RPTFE, PEEK, Nylon (auxiliary seal); metal seal with Stellite alloy overlay welding is optional for primary seal
Sealing Materials: Graphite packing (stem seal), metal-to-metal seat seal (primary seal)
Bearing / Support Shaft: 440C stainless steel with self-lubricating bearings, or Inconel alloy
Extended Stem: Material matching the valve body or stainless steel, length customized according to burial depth
End Connection: Butt Welded (BW, conforming to ASME B16.25 / EN 12627)
Operation: Manual (worm gear / bevel gear with bearing-assisted torque reduction), pneumatic, electric, hydraulic, pneumatic-hydraulic actuated (installed in underground wells with ground operation)
Design Standards: API 6D, ASME B16.34
Inspection & Test Standards: API 6D
Face-to-Face Dimension: Conforms to ASME B16.10Brand:J-VALVES - Nominal Size: 12″ (DN300)
Pressure Class: 300LB (PN50)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel); optional A350 LF2 (-46℃ low-temperature steel) or A182 F316 (stainless steel upgrade)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: Surface-hardened A105 or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE / RPTFE (-29℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal + flexible graphite (-29℃ ~ 425℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW matching base material, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Electric (multi-turn / quarter-turn, preferred); optional pneumatic, pneumatic-hydraulic, manual
Power Supply: 380V / 220V / 24V AC or DC, custom voltage available upon request
Ingress Protection: IP67 / IP68 (outdoor / subsea); explosion-proof type Ex d IIB T4 available
Control Mode: On-off type (ON/OFF), modulating type (4-20mA proportional control), intelligent type (fieldbus communication)
Operating Time: Fully open / fully close adjustable from 15 to 120 seconds (depending on torque and motor power)
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face: ASME B16.10Brand:J-VALVES - Size Range: 2″ to 60″ (DN50 to DN1500)
Pressure Class: 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel), A350 LF2 (low-temperature steel), A694 F52/F65 (high-strength line pipe steel), A182 F316 (stainless steel)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: A105 with surface hardening or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE/RPTFE (-46℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal with flexible graphite (-46℃ ~ 650℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW compatible with base materials, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt-weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Gas-Hydraulic (preferred); optional pure pneumatic, electric, electro-hydraulic actuator
Supply Air Pressure: 0.5~1.0 MPa (pipeline natural gas or nitrogen)
Operating Time: Fully open / fully close adjustable within 5~30 seconds; emergency shutdown < 10 seconds
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face Dimensions: ASME B16.10Brand:J-VALVES - Nominal Size: 12″ (DN300)
Pressure Class: 300LB (PN50)
Temperature Range: -29℃ to +425℃
Body / Ends: ASTM A105 (carbon steel); optional A350 LF2 (-46℃ low-temperature steel) or A182 F316 (stainless steel upgrade)
Ball: A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Support: Surface-hardened A105 or 17-4PH stainless steel
Stem: 17-4PH or Inconel 718
Seat Seal:
PTFE / RPTFE (-29℃ ~ 180℃)
PEEK (-60℃ ~ 260℃)
Metal seal + flexible graphite (-29℃ ~ 425℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Consumables: ER70S / GMAW / SAW matching base material, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Actuation: Electric (multi-turn / quarter-turn, preferred); optional pneumatic, pneumatic-hydraulic, manual
Power Supply: 380V / 220V / 24V AC or DC, custom voltage available upon request
Ingress Protection: IP67 / IP68 (outdoor / subsea); explosion-proof type Ex d IIB T4 available
Control Mode: On-off type (ON/OFF), modulating type (4-20mA proportional control), intelligent type (fieldbus communication)
Operating Time: Fully open / fully close adjustable from 15 to 120 seconds (depending on torque and motor power)
Design Standards: API 6D, ASME B16.34
Testing Standards: API 6D, API 598
Face-to-Face: ASME B16.10Brand:J-VALVES -
Size Range: 6″ to 56″ (DN150 to DN1400)
Pressure Class: 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body / Ends:ASTM A105 (carbon steel), A350 LF2 (low-temperature steel down to -46℃), A694 F52/F65 (high-strength line pipe steel), A182 F316/F316L (stainless steel)
Ball:A105 with ENP / hard chrome plating / tungsten carbide coating; or solid F316
Trunnion / Supports:A105 with surface hardening or 17-4PH stainless steel
Stem:17-4PH or Inconel 718 (extended design with anti-corrosion treatment)
Extension Sleeve:A105/F316 with 3PE/FBE anti-corrosion coating, or solid stainless steel
Seat Seal:PTFE/RPTFE (-46℃ ~ 180℃);PEEK (-60℃ ~ 260℃);Metal seal with flexible graphite (-46℃ ~ 650℃)
Packing:Flexible graphite reinforced with Inconel wire
Welding Consumables:ER70S / GMAW / SAW compatible with base materials, 100% radiographic testing (RT)
End Connection:Fully welded BW butt-weld ends (ASME B16.25 / API 5L matched), for direct buried installation
Stem Extension:Standard 500mm ~ 2000mm, or customized according to burial depth
External Anti-Corrosion:3PE (three-layer polyethylene), FBE (fusion-bonded epoxy), coal tar epoxy, in compliance with DIN 30670 / AWWA C213
Cathodic Protection:Compatible with sacrificial anodes (zinc / aluminum) or impressed current systems
Operation:Manual (above-ground worm gearbox), pneumatic (above-ground cylinder), electric (above-ground motor), hydraulic, gas-hydraulic actuator
Design Standards:API 6D, ASME B16.34
Inspection & Test Standards:API 6D, API 598
Face-to-Face Dimensions:ASME B16.10Brand:J-VALVES - Size Range: 6″ to 56″ (DN150 to DN1400)
Pressure Class: 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body/Ends: ASTM A105 (carbon steel), A350 LF2 (low-temperature steel down to -46℃), A694 F52/F65 (high-strength line pipe steel), A182 F316/F316L (stainless steel)
Ball: A105 with ENP / hard chrome plating / tungsten carbide spray coating; A694 F65 with surface hardening; or solid F316
Trunnion/Supports: A105 with surface hardening or 17-4PH stainless steel; A694 F65 with surface hardening
Stem: 17-4PH or Inconel 718
Seat Seal: PTFE/RPTFE (-46℃~180℃); PEEK (-60℃~260℃); metal seal + flexible graphite (-46℃~650℃)
Packing: Flexible graphite reinforced with Inconel wire
Welding Materials: ER70S / GMAW / SAW compatible with base materials, 100% radiographic testing (RT)
End Connection: Full-bore welded BW butt-weld ends (matching ASME B16.25 / API 5L); optional flanged transition ends
Operation: Manual (worm gear box), pneumatic (single/double acting), electric (multi-turn / quarter-turn), hydraulic, gas-hydraulic actuator
Air Supply Pressure (gas-hydraulic actuator): 0.5~1.0 MPa (pipeline natural gas or nitrogen)
Operating Time: Fully open / fully close adjustable within 5~60 seconds; emergency shutdown <10 seconds (gas-hydraulic actuator)
Design Standard: API 6D, ASME B16.34
Testing Standard: API 6D, API 598
Face-to-Face Dimension: ASME B16.10Brand:J-VALVES -
Size Range: 2″ to 56″ (DN50 to DN1400)
Pressure Rating: Class 150LB to 2500LB (PN20 to PN420)
Temperature Range: -29℃ to +425℃
Body / Bonnet: Forged steel including A105, A350 LF2, A182 F304/F316, F51/F53 duplex stainless steel, etc.
Ball: A182 F304/F316, F51/F53, with surface hardening treatment (ENP / coating)
Stem: A182 F304/F316, 17-4PH, high-strength stainless steel
Seat: PTFE/RPTFE (standard), nylon, PEEK, metal seal (for high temperature and high pressure)
Sealing Materials: PTFE, RPTFE, graphite, metal seal
End Connection: Full welded ends (BW butt weld / socket weld), flanged ends (optional)
Operation: Electric (on-off / modulating / intelligent type), manual / pneumatic / hydraulic backup available upon request
Design Standard: API 6D, API 608, ASME B16.34
Test Standard: API 6D, API 598Brand:J-VALVES - Nominal Bore: 2" to 56" (DN50 to DN1400)
Pressure Class: 150LB to 2500LB (PN16 to PN420)
Temperature Range: -29℃ to +425℃
Body / Ends: Forged steel or steel pipe including ASTM A105, A350 LF2, A694 F52/F65, A182 F304/F316/F51, etc.
Ball: Material matching the valve body + hard chrome plating or nitriding treatment
Stem: 17-4PH, 316, F51 and other stainless steels
Seat: PTFE, RPTFE, PEEK, Nylon (secondary seal); metal seal with Stellite alloy overlay welding is optional for primary seal
Sealing Materials: Graphite packing (stem seal), metal-to-metal seat seal (primary seal)
Bearing / Support Shaft: 440C stainless steel with self-lubricating bearings, or Inconel alloy
End Connection: Butt Welded (BW, conforming to ASME B16.25 / EN 12627)
Operation: Pneumatic (double-acting or spring return)
Air Supply Pressure: 0.4–0.7MPa (standard), high-pressure type available as an option
Actuator Type: Rack-and-pinion, scotch-yoke or scotch-yoke & rack combined high-torque pneumatic actuator
Optional Accessories: Solenoid valve, limit switch, positioner, filter regulator, handwheel mechanism, quick exhaust valve, pneumatic-hydraulic actuation unit, etc.
Design Standards: API 6D, ASME B16.34
Test Standard: API 6D
Face-to-Face Dimension: Conforms to ASME B16.10Brand:J-VALVES
Fully Welded ball valves FAQ
Q1 Why choose a fully welded ball valve for gas pipelines?
The welded body eliminates flanged leak paths - zero-leakage, maintenance-free service for buried and trunk-line installations.
Q2 Are buried/underground versions available?
Q3 What fire-safe certification is provided?
