1/2 inch F304 forged stainless steel cryogenic flanged gate valve Class 300 with extended bonnet

1/2″ – 2″ Class 300 Forged Cryogenic Gate Valve | F304 Extended Bonnet | BSO Ballseal

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Engineered for extreme low-temperature applications down to -196°C, this premium Class 300 F304 Cryogenic Forged Gate Valve delivers uncompromising isolation performance. As a high-density API 602 forged cryogenic valve, it features a specialized extended bonnet cryogenic gate valve design that protects the stem packing from freezing, ensuring smooth operation in critical liquefied natural gas and air separation plants. Specifically built as an LNG isolation gate valve, this F304 stainless steel low temperature valve guarantees zero-leakage shut-off in the most severe deep-cold environments.

❄️ Cryogenic Engineering & Compliance Highlights:

  • Extended Bonnet Protection: Specialized elongated neck keeps the packing area away from deep-cold fluids, preventing frost build-up and stem seizure.
  • Forged Material Density: ASTM A182 F304 forged stainless steel eliminates the risk of casting porosity, providing ultimate structural safety for high-pressure liquefied gases.
  • Cryogenic Standards: Manufactured and tested in strict accordance with API 602, API 598, and BS 6364 (Cryogenic testing standard).
  • Connection Versatility: Available in 1/2″ to 2″ sizes with Flanged, Socket Weld (SW), or Threaded (NPT) ends.
Category: Tags: , , , ,
Valve Type Forged Cryogenic Gate Valve (Extended Bonnet)
Body Material F304 (ASTM A182 Forged Stainless Steel)
Pressure Rating Class 300
Design Standard API 602 / ASME B16.34 / BS 6364
Connection Flanged (RF) / Socket Weld (SW) / Threaded (NPT)

❄️ Deep Cryogenic Treatment: To ensure absolute dimensional stability at -196°C, all F304 forged components undergo a rigorous deep-cooling treatment in liquid nitrogen. This eliminates martensitic transformation and prevents valve body deformation during extreme LNG isolation.

Chemical Composition (ASTM A182 F304)

High-density forged austenitic stainless steel for maximum low-temperature toughness.

Grade C% Mn% Si% P% S% Cr% Ni%
F304 ≤ 0.08 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 18.0-20.0 8.0-11.0

Main Dimensions (Class 300 Forged Series)

Size (Inch) Port (mm) Face-to-Face (L) Handwheel OD
1/2″ 13 140 100
3/4″ 19 152 100
1″ 25 165 125
1-1/4″ 32 178 160
1-1/2″ 38 190 160
2″ 50 216 180

🌐 LNG & Cryogenic Testing Standards

Every low-temperature F304 valve is strictly tested to guarantee zero leakage in hazardous gas applications:

  • BS 6364 Testing: Low-temperature Helium Leak Test (Helium mass spectrometer) ensures absolute packing and seat sealing integrity.
  • Standards: API 602, ASME B16.34, and NACE MR0175 compliant.
  • Documentation: EN 10204 3.1 MTC provided. Complete cryogenic test reports available upon request.
Design Feature

Bolted Bonnet, Cryogenic, Extended Bonnet, Forged Body, OS&Y
End Connection

Flanged
Material

Forged Steel (F304)
Pressure Class

Class 300

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