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 ：12 inch (DN300); 2-56 inch in the family
Pressure Class： ASME Class 300 (PN50), 51.1 bar at 38°C
Body Material： ASTM A105 forged carbon steel, welded closure
Ball： A105 with ENP or hard chrome; F304 / F316 option
Seat： A105 with Stellite or nickel-based hardfacing; PTFE / RPTFE option
Stem： F316 or 17-4PH, anti-blowout, extended for burial
Seat Effect： Double piston effect (DPE) standard for welded body
End Connection： Butt weld to ASME B16.25
Temperature Range： -29°C to +425°C
Design Standard： API 6D, ASME B16.34
Test Standard： API 598 shell and seat, API 6FA fire safe
Body Weld NDT： 100% RT or UT on the welded closure
Operation： Worm gear standard; pneumatic, electric, gas-hydraulicBrand:J-VALVES -
Size Range： 2 to 16 inch (DN50 to DN400)
Pressure Class： ASME Class 150 to 300 / PN20 to PN50
Typical Inlet Pressure： 0.2 to 1.6 MPa at the take-off point
Body： Fully welded for burial, or flanged for kiosk installation
Body Material: A105, A350 LF2, F304, F316
Ball： F304, F316, ENP plated
Seat： RPTFE, Devlon, PEEK; single piston effect standard
Cavity Relief： Automatic through the SPE seat, no external device needed
Stem： F316, anti-blowout, extended for buried installation
Packing： Flexible graphite, low emission composite
End Connection： Flanged RF to ASME B16.5, or butt weld to ASME B16.25
Actuator： Gas-liquid, intensification ratio 12:1 to 40:1
Gas Supply： Taken upstream of the regulator, filtered to 40 micron
Fail Position： Fail closed standard, fail open on request
Closing Time： 20 to 60 seconds, adjustable
Manual Override： Hand pump, captive handle, under 120 strokes for full travel
Cycle Life Basis： 300 to 2,000 operations per year
Position Indication： Mechanical indicator readable outside the kiosk
Enclosure： IP65 cabinet, vent piped to a safe height
Design Standard： API 6D, ASME B16.34
Test Standard： API 598, ISO 5208, functional test at minimum supply pressureBrand:J-VALVES -
Size Range： 2 to 60 inch (DN50 to DN1500)
Pressure Class： ASME Class 150 to 2500 / PN20 to PN420
Body Construction： Fully welded, two girth welds, 100% RT plus UT
Body Material： A105, A350 LF2, F304, F316, F51 duplex, API 5L pipe steel
Ball： F304, F316, F51, ENP or HVOF tungsten carbide
Seat： RPTFE, Devlon, Vespel soft; Inconel or Stellite metal
Seat Design： Single or double piston effect, double block and bleed
Stem： F6a, F304, F316, 17-4PH, anti-blowout to API 6D
Packing： Pure graphite, Inconel reinforced, low emission composite
End Connection： Butt weld to ASME B16.25; flanged transition RF/RTJ optional
Actuator： Gas-over-oil, double acting or spring return, scotch yoke
Gas Supply： Pipeline gas 0.5 to 10 MPa, filtered to 40 micron
Intensification Ratio： 6:1 to 10:1 depending on size and line pressure
Closing Time： 15 to 120 seconds, adjustable, cushioned final 15% of travel
Control Functions： ESD, under-pressure trip, rate-of-pressure-drop trip
Manual Override： Hydraulic hand pump with independent reservoir
Remote Interface： 4-20 mA, Modbus RTU, SCADA
Design Standard： API 6D, ASME B16.34, API 6DSS on request
Test Standard： API 6D, API 598, ISO 5208
Fire Safe / Emission： API 607, ISO 10497; ISO 15848-1 on request
Coating： Three layer PE or FBE, holiday tested at 5-10 kV
Design Life： 30 to 50 years, matched to the pipelineBrand:J-VALVES -
Size Range： 1/2 to 24 inch (DN15 to DN600)
Pressure Class： ASME Class 150, 300, 600, 900, 1500
Valve Type： Floating or trunnion mounted ball valve
Actuator Type： Quarter-turn electric, on-off or modulating
Supply Voltage： 24 V DC, 24 V AC, 110-240 V AC, 380-415 V AC
Control Signal： Volt free contacts, 4-20 mA, 0-10 V, Modbus RTU
Duty Cycle： S2 15-30 min on-off, S4 30-75 percent modulating
Fail Action： Stay put, battery backup, or spring return motor
Enclosure： IP67 standard, IP68 on request, ATEX Ex d available
Body Material： WCB, CF8M, CF8, A105, F316
Seat： PTFE, RPTFE, PEEK, metal seated
Manual Override： Declutchable handwheel or hex drive
Design Standard： API 6D, API 608, ASME B16.34Brand:J-VALVES -
Size Range ：DN50 to DN1200 (2 to 48 inch)
Pressure Class： ASME Class 150 to 600 / PN16 to PN100
Body Construction： Fully welded barrel and ends, double weld seal available
Body Material： WCB, LCC, A105, CF8M, CF3M
Ball： F316 / CF8M, hard chrome or ENP plated
Seat： Reinforced PTFE, nylon, PEEK, or metal seated
Stem and Extension： F316 or 17-4PH, extension 0.5 to 2.5 m
Stem Seal： Double O-ring with grease injection port
End Connection： Butt weld to ASME B16.25, flanged on request
Coating： 3LPE to DIN 30670, FBE, pre-insulated to EN 253 / EN 448
Design Standard： API 6D, EN 14141, ASME B16.34
Pressure Test： Shell 1.5x, seat 1.1x, weld RT/UT, interspace 5 to 6 bar
Operation： Lever, gear, square nut, pneumatic or electric actuatorBrand:J-VALVES - A fully welded pipeline ball valve driven by a gas-over-oil actuator that uses line gas at 2 to 10 bar to turn a scotch-yoke operator through 90 degrees. DN50 to DN1500, Class 150 to 2500, butt weld ends, extended stem for burial, API 6D with ESD fail-safe.Nominal Size: DN50 to DN1500 (2 inch to 60 inch)
Pressure Class: ASME Class 150 / 300 / 600 / 900 / 1500 / 2500
Body Construction: Fully welded, seamless pipe with forged closures
End Connection: Butt weld to ASME B16.25, flanged RF or RTJ optional
Body Material: A106 Gr B, A105, LF2, F304, F316, F51 duplex
Ball Material: A105 or F316 with ENP, tungsten carbide HVOF option
Stem Material: F316, 17-4PH or F51
Seat Type: Single piston effect, double piston effect or combined DIB
Seat Insert: PTFE, RPTFE, PEEK, nylon or metal to metal
Actuator Type: Scotch yoke gas-over-oil, spring return or double acting
Gas Supply: 2 to 10 bar clean dry natural gas or nitrogen
Failure Mode: Fail close, fail last, fail open or double acting
Temperature Range: -46 C to 200 C standard, -196 C cryogenic option
Design Standard: API 6D / ISO 14313, ASME B16.34
Test Standard: API 598 / ISO 5208, shell 1.5x, seat 1.1x
Fire Safe: API 607 / API 6FA / ISO 10497
Material Certificate: EN 10204 3.1 with heat number traceability
Design Life: 30 years for the welded bodyBrand:J-VALVES -
A fully welded trunnion mounted ball valve for buried and high cycle gas service. Class 150 to 2500, 2 to 56 inch, with double piston effect seats, sealant injection and a stem seal that can be renewed in line.Nominal Size: 2 inch to 56 inch (DN50 to DN1400)
Pressure Class: ASME Class 150 / 300 / 600 / 900 / 1500 / 2500
Body Style: Fully welded one or two piece, no body flange
Bore: Full bore or reduced bore to API 6D table 1
Body Material: A105 forged, WCB or LCC cast, A182 F316, F51 duplex
Ball and Stem: A182 F316 with ENP or hard chrome
Seat Arrangement: SPE, DPE (DIB 1) or combination (DIB 2)
Seat Insert: PTFE, RPTFE, PEEK, tungsten carbide, ENP metal
End Connection: Butt weld to ASME B16.25, flanged RF / RTJ, hub
Operation: Gearbox, pneumatic, electric, gas over oil
Design Standard: API 6D / ISO 14313, ASME B16.34
Test Standard: API 598, shell 1.5x and seat 1.1x both directions
Fire Safe: API 607 / ISO 10497 / API 6FA
Temperature Range: Minus 29 C to plus 200 C standard, minus 46 C low, minus 196 C cryogenic
Stem Extension: Made to order against site depth of cover
Coating: RAL 5015 standard, 3LPE or FBE for direct burial
Material Certificate: EN 10204 3.1 with heat number traceabilityBrand: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 - 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 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
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?
