Nominal Bore: 20" × 16" (DN500 × DN400)
Pressure Class: 900LB (PN150)
Temperature Range: -29℃ to +425℃
Body/Bonnet: ASTM A352 LCB/LCC (low-temperature cast carbon steel), or A350 LF2 / A182 F304/F316 (low-temperature forged stainless steel, cryogenically treated)
Ball: Material matching the body + hard chrome plating or nitriding treatment
Stem: F304/F316 or 17-4PH (cryogenically treated)
Seat: PCTFE (Polychlorotrifluoroethylene), PTFE, RPTFE; PEEK available for cryogenic high-pressure service
Sealing Materials: PCTFE/PTFE/RPTFE (seats); low-temperature special graphite or PTFE/V-type combination (stem packing)
Extended Stem/Bonnet: Material matching the body, length customized to insulation thickness
Bearing/Support Shaft: F304/F316 or Inconel alloy + low-temperature self-lubricating bearings
Gasket: Metal ring gasket (octagonal/oval type, conforming to ASME B16.20) or low-temperature special gasket
End Connection: Flanged (RTJ ring-type joint face, conforming to ASME B16.5)
Operation: Manual (low-temperature worm gear/bevel gear, bearing-assisted torque reduction), pneumatic (low-temperature type), electric (low-temperature type), hydraulic (high-torque actuator mandatory with low-temperature accessories)
Design Standards: ASME B16.34, API 6D, API 608
Inspection & Test Standard: API 598, API 6D
Face-to-Face Dimension: Conforms to ASME B16.10

Nominal Size: 8″ (DN200)
Pressure Class: 900LB (PN150)
Temperature Range: -196℃ to +100℃
Body / End Caps:ASTM A182 F304/F304L forged stainless steel; optional F316/F316L (for enhanced corrosion resistance) or A350 LF2 (economic low-temperature steel, limited to -46℃).
Ball:F304 with ENP (electroless nickel plating), hard chrome plating, or Stellite alloy overlay.
Trunnion / Supports:Surface-hardened F304 or 17-4PH precipitation hardening stainless steel.
Stem:Extended stem in F304/F304L, 17-4PH or Inconel 718 (for higher strength).
Seat Seal:Modified PTFE (-196℃ ~ 150℃); PEEK (-60℃ ~ 260℃); metal seal with flexible graphite (-196℃ ~ 650℃).
Packing:Flexible graphite reinforced with Inconel wire, special braided packing for low-temperature service.
Gasket:Flexible graphite stainless steel spiral wound gasket (304/316L) or metal ring gasket.
Bolts:ASTM A320 L7/L7M (low-temperature alloy steel) or B8M (F316 stainless steel), with A194 7/7M/8M nuts.
End Connection:Flanged (RF raised face / RTJ ring type joint, ASME B16.5); optional BW butt-weld ends (ASME B16.25).
Operation:Manual (worm gearbox, standard with cryogenic extended stem); pneumatic (low-temperature cylinder with dry air supply), electric (low-temperature motor), hydraulic.
Design Standards:ASME B16.34, API 6D, API 608
Inspection & Test Standards:API 598, API 6D
Face-to-Face Dimension:ASME B16.10

Size Range: 2″ to 48″ (DN100 to DN1200)
Pressure Rating: Class 150LB to 300LB (PN20 to PN50)
Temperature Range: -196℃ to +100℃
Body: ASTM A352 LCB/LCC/LC3, A182 F304/F316/F316L, A351 CF8/CF8M/CF3M
Ball: F316/F316L with ENP electroless nickel plating (anti-sticking, wear-resistant), or A351 CF8M
Stem: F316/F316L/17-4PH, excellent low-temperature toughness after cryogenic treatment
Seat: PCTFE (Kel-F, optimal elasticity at -196℃) / RPTFE / metal seal (graphite inserted)
Packing: Pure PTFE V-rings / special low-temperature braided graphite packing
Bolts: ASTM A320 L7/L7M (low-temperature high-strength bolts) with A194 Gr.7/7M nuts
Gasket: Stainless steel spiral-wound gasket (316L/flexible graphite filled) / metal ring gasket
End Connection: Flanged (RF/RTJ, conforming to ASME B16.5), Butt Weld (BW, conforming to ASME B16.25), welded pipe spool + flange (convenient for cold insulation construction)
Operation: Manual (lever/worm gear, with extension stem or stand), pneumatic (low-temperature type with dry instrument air), electric (low-temperature type with heating and dehumidification), hydraulic
Design Standard: API 6D, ASME B16.34
Test Standard: API 598, API 6D
Face-to-Face Dimension: Conforms to ASME B16.10

Nominal Bore: 20" × 16" (DN500 × DN400)
Pressure Class: 900LB (PN150)
Temperature Range: -29℃ to +425℃
Body/Bonnet: ASTM A352 LCB/LCC (low-temperature cast carbon steel), or A350 LF2 / A182 F304/F316 (low-temperature forged stainless steel, cryogenically treated)
Ball: Material matching the body + hard chrome plating or nitriding treatment
Stem: F304/F316 or 17-4PH (cryogenically treated)
Seat: PCTFE (Polychlorotrifluoroethylene), PTFE, RPTFE; PEEK available for cryogenic high-pressure service
Sealing Materials: PCTFE/PTFE/RPTFE (seats); low-temperature special graphite or PTFE/V-type combination (stem packing)
Extended Stem/Bonnet: Material matching the body, length customized to insulation thickness
Bearing/Support Shaft: F304/F316 or Inconel alloy + low-temperature self-lubricating bearings
Gasket: Metal ring gasket (octagonal/oval type, conforming to ASME B16.20) or low-temperature special gasket
End Connection: Flanged (RTJ ring-type joint face, conforming to ASME B16.5)
Operation: Manual (low-temperature worm gear/bevel gear, bearing-assisted torque reduction), pneumatic (low-temperature type), electric (low-temperature type), hydraulic (high-torque actuator mandatory with low-temperature accessories)
Design Standards: ASME B16.34, API 6D, API 608
Inspection & Test Standard: API 598, API 6D
Face-to-Face Dimension: Conforms to ASME B16.10

Nominal Diameter: 8 inches (DN200)
Pressure Class: 900LB (PN150)
Temperature Range: -29℃ to +425℃
Valve Body / Bonnet / Center Section: ASTM A182 F304 forged stainless steel (cryogenically treated)
Ball: F304 with hard chrome plating, or F304L (optional)
Stem: F304 or 17-4PH precipitation hardening stainless steel (cryogenically treated)
Seats: PCTFE, PTFE, RPTFE; PEEK available for cryogenic high-pressure service
Sealing Materials: PCTFE / PTFE / RPTFE (seat seals), special low-temperature graphite or PTFE V-type combination (stem packing)
Extended Stem / Bonnet: F304 stainless steel, length customized according to insulation thickness
Bearings / Support Shafts: F304 stainless steel with low-temperature self-lubricating bearings
Gaskets: Spiral-wound gaskets (inner and outer rings) or special low-temperature gaskets
End Connection: Flanged (RF Raised Face or RTJ Ring-Type Joint, conforming to ASME B16.5)
Operation: Manual (worm gear / bevel gear with torque-reducing bearings), pneumatic (low-temperature type), electric (low-temperature type), hydraulic (high-torque actuator required with low-temperature accessories)
Design Standard: ASME B16.34, API 6D, API 608
Testing Standard: API 598, API 6D
Face-to-Face Dimension: In accordance with ASME B16.10

Nominal Size: 8″ (DN200)
Pressure Class: 900LB (PN150)
Temperature Range: -196℃ to +100℃
Body / End Caps:ASTM A182 F304/F304L forged stainless steel; optional F316/F316L (for enhanced corrosion resistance) or A350 LF2 (economic low-temperature steel, limited to -46℃).
Ball:F304 with ENP (electroless nickel plating), hard chrome plating, or Stellite alloy overlay.
Trunnion / Supports:Surface-hardened F304 or 17-4PH precipitation hardening stainless steel.
Stem:Extended stem in F304/F304L, 17-4PH or Inconel 718 (for higher strength).
Seat Seal:Modified PTFE (-196℃ ~ 150℃); PEEK (-60℃ ~ 260℃); metal seal with flexible graphite (-196℃ ~ 650℃).
Packing:Flexible graphite reinforced with Inconel wire, special braided packing for low-temperature service.
Gasket:Flexible graphite stainless steel spiral wound gasket (304/316L) or metal ring gasket.
Bolts:ASTM A320 L7/L7M (low-temperature alloy steel) or B8M (F316 stainless steel), with A194 7/7M/8M nuts.
End Connection:Flanged (RF raised face / RTJ ring type joint, ASME B16.5); optional BW butt-weld ends (ASME B16.25).
Operation:Manual (worm gearbox, standard with cryogenic extended stem); pneumatic (low-temperature cylinder with dry air supply), electric (low-temperature motor), hydraulic.
Design Standards:ASME B16.34, API 6D, API 608
Inspection & Test Standards:API 598, API 6D
Face-to-Face Dimension:ASME B16.10

Nominal Size: 8″ (DN200)
Pressure Class: 900LB (PN150)
Temperature Range: -196℃ to +100℃
Body/End Cap: ASTM A182 F304/F304L forged stainless steel; optional F316/F316L (higher corrosion resistance) or A350 LF2 (economic low-temperature steel, limited to -46℃)
Ball: F304 with ENP (electroless nickel plating) / hard chrome plating / Stellite alloy overlay
Trunnion/Support: Surface-hardened F304 or 17-4PH precipitation hardening stainless steel
Stem: Extended stem in F304/F304L; optional 17-4PH or Inconel 718 (higher strength)
Seat Sealing: Modified PTFE (-196℃~150℃); PEEK (-60℃~260℃); metal seal with flexible graphite (-196℃~650℃)
Packing: Flexible graphite reinforced with Inconel wire, special braided packing for cryogenic service
Gasket: Flexible graphite stainless steel spiral wound gasket (304/316L) or metal ring joint gasket
Bolts: ASTM A320 L7/L7M (low-temperature alloy steel) or B8M (F316 stainless steel), with A194 7/7M/8M nuts
End Connection: Flanged (RF Raised Face / RTJ Ring Type Joint, in accordance with ASME B16.5); optional BW butt weld ends (ASME B16.25)
Operation: Manual (worm gearbox, standard with cryogenic extended stem); pneumatic (low-temperature cylinder with dry air supply), electric (low-temperature motor), hydraulic
Design Standard: ASME B16.34, API 6D, API 608
Testing Standard: API 598, API 6D
Face-to-Face Dimension: In accordance with ASME B16.10

Nominal Size: 8″ (DN200)
Pressure Class: 900LB (PN150)
Temperature Range: -196℃ to +100℃
Body / Bonnet: Forged stainless steel ASTM A182 F304/F304L; upgrade options available: F316/F316L (higher corrosion resistance) or A350 LF2 (economic low-temperature steel, rated to -46℃)
Ball: F304 with ENP (electroless nickel plating) / hard chrome plating / Stellite alloy hardfacing
Trunnion / Supports: Surface‑hardened F304 or 17‑4PH precipitation‑hardened stainless steel
Stem: Extended stem in F304/F304L, 17‑4PH or Inconel 718 (higher strength)
Seat Seal:Modified PTFE (-196℃ ~ 150℃).PEEK (-60℃ ~ 260℃).Metal seal with flexible graphite (-196℃ ~ 650℃)

Size Range: 2″ ~ 48″ (DN50 ~ DN1200)
Pressure Rating: Class 150, Class 300 (PN20 ~ PN40)
Temperature Range: -196℃ to +100℃
Valve Body / End Cap: ASTM A351 CF8 / CF8M / CF3M, A350 LF2, A352 LCB / LCC
Ball: CF8 / CF8M with Stellite alloy hardfacing (optional), tungsten carbide coating (optional)
Seat: PCTFE, modified PTFE, UHMWPE, CF8 / CF8M with Stellite alloy hardfacing (metal seal optional)
Stem: 316 / 316L / Inconel 718
Sealing Materials: PCTFE, modified PTFE, UHMWPE, flexible graphite (specially for cryogenic service)
Packing: Flexible graphite, cryogenic special packing (retains elasticity at -196℃)
Flange Facing: RF (Raised Face) / RTJ (Ring Type Joint), in accordance with ASME B16.5
Bolts / Nuts: ASTM A320 L7 / A194 7 (low-temperature alloy steel) or B8M / 8M (stainless steel, optional)
End Connection: Flanged (RF / RTJ), Butt Weld (BW)
Operation: Manual (heavy-duty worm gear, standard), pneumatic (double-acting / single-acting / spring return), electric (on-off / modulating / intelligent), hydraulic
Design Standards: ASME B16.34, API 6D, API 608
Testing Standards: API 598, API 6D
Face-to-Face Dimensions: In accordance with ASME B16.10

Nominal Diameter: 28" (DN700)
Pressure Class: 300LB (PN50)
Temperature Range: -196℃ to +100℃
Low-Temperature Impact Test:Complies with cryogenic valve standards including GB/T 24925, BS 6364, MSS SP-134. Key components such as body, bonnet, ball and stem pass Charpy V-Notch impact test at -196℃ in liquid nitrogen or LNG service.
Body / Bonnet: ASTM A351 CF8 (304) stainless steel; CF8M (316) / CF3M (316L) available upon request
Ball: CF8 / CF8M with optional Stellite alloy hardfacing
Seat: PCTFE, modified PTFE, UHMWPE, metal seal (CF8 with Stellite alloy hardfacing, optional)
Stem: 316 stainless steel / 17-4PH / Inconel 718 (excellent low-temperature toughness)
Sealing Materials: PCTFE, modified PTFE, UHMWPE, flexible graphite, metal hard seal (Stellite alloy, optional)
Packing: Flexible graphite, special low-temperature packing (retains elasticity at -196℃)
Flange Facing: RF (Raised Face), in accordance with ASME B16.5
Bolts / Nuts: ASTM A320 L7 / A194 7 (low-temperature alloy steel), or B8M / 8M (stainless steel, optional)
End Connection: Flanged (RF, conforming to ASME B16.5), Butt-Welded (BW, optional)
Operation: Manual (heavy-duty worm gear, standard), Pneumatic (double-acting / single-acting / spring return), Electric (on-off / modulating / smart type), Hydraulic
Design Standards: ASME B16.34, API 6D, API 608
Test Standards: API 6D, API 598
Cryogenic Testing:Body shell test, seat seal test, low-temperature operation test and packing leakage test are all performed at -196℃ in liquid nitrogen or LNG environment.
Face-to-Face Dimension: In accordance with ASME B16.10

Nominal Size: 28" (DN700)
Pressure Class: Class 300 (PN50)
Temperature Range: -196℃ to +100℃
Body: Cast ASTM A351 CF8 (304 stainless steel)
Ball: CF8, surface polished to Ra ≤ 0.4μm or HVOF tungsten carbide coated
Stem: F304, 316 stainless steel, 17-4PH, qualified for low-temperature impact test
Seat: PCTFE (Kel-F), modified PTFE, UHMWPE, metal seal (Inconel alloy / Stellite alloy)
Bearing: PTFE with stainless steel, RPTFE self-lubricated, metal bearing (for large-bore low-temperature service)
Packing: Pure graphite, Inconel wire-reinforced graphite, special low-temperature V-type PTFE combination
Extended Bonnet: CF8 stainless steel, length conforming to BS 6364 (typically ≥ 1000mm for DN700, customizable)
Gearbox / Actuator: Stainless steel or low-temperature treated cast steel, with manual override, torque 30,000–80,000 Nm
End Connection: Flanged (RF / RTJ), Butt Weld (BW)
Operation: Manual (gearbox with extension rod or stand), pneumatic (low-temperature double-acting / spring return), electric (low-temperature on-off / modulating), hydraulic
Design Standard: ASME B16.34, API 608, API 6D
Testing Standard: API 598
Low-Temperature Test: Seat and stem leakage rates meet requirements at -196℃, in compliance with BS 6364 or MSS SP-134
Face-to-Face Dimension: In accordance with ASME B16.10

Nominal Size: 20" × 16" (DN500 × DN400), reduced bore design
Pressure Class: Class 900 (PN150)
Temperature Range: -196℃ to +100℃
Body: Forged stainless steel ASTM A182 F316
Ball: F316, with HVOF tungsten carbide coating or Stellite alloy hardfacing, hardness ≥ 68 HRC
Stem: F316, 17-4PH precipitation hardening stainless steel, Inconel 718
Seat: PCTFE (Kel-F), modified PTFE, UHMWPE, metal seat (Inconel alloy / Stellite alloy)
Bearing: Metal bearing (Stellite alloy / tungsten carbide), self-lubricating or forced lubrication design
Packing: Pure graphite, Inconel wire-reinforced graphite, special low-temperature V-type PTFE combination
Extended Bonnet: F316 stainless steel, length conforming to BS 6364 (typically ≥ 800 mm for DN500)
Gearbox / Actuator: Stainless steel or low-temperature treated cast steel, equipped with manual override, torque range 50,000–150,000 Nm
End Connection: Flanged (RF/RTJ), Butt Weld (BW)
Operation: Manual (worm gear with extended stem or stand), pneumatic (low-temperature high-pressure double-acting / spring return), electric (low-temperature high-pressure on-off / modulating), hydraulic
Design Standards: ASME B16.34, API 608, API 6D
Test Standards: API 598
Cryogenic Test: Seat and stem leakage rates qualified at -196℃, in compliance with BS 6364 or MSS SP-134
Face-to-Face Dimensions: ASME B16.10