A350 LF2 cryogenic forged steel ball valve features either a bolted or welded bonnet design. The bolted type utilizes bolt-nut connections with spiral-wound gaskets for sealing, while the welded type employs threaded connections with full-welded sealing. The valve body is constructed from materials such as ASTM A350 LF2, LC3, and CF8 (304), making it suitable for media including liquefied natural gas (LNG), liquid oxygen (LO2), and liquid nitrogen (LN2).
The product incorporates an extended bonnet structure with a self-centering pressure plate and bushing design, along with an integral upper sealing seat. Certain models are equipped with seat pressure balance holes. Maintenance requires adjusting grease injection pressure based on different sealing materials, with hard seals requiring higher pressure.
Design Standard: API 6D, BS 5351
Structure: 3pcs Body, Side Entry, Bolted Bonnet, Soft Seat
Nominal Size: 36 Inch, DN900
Nominal Class: 1500 LB, PN250
Operation: Lever/Gear
Body Material: ASTM A105N or ASTM A350 LF2
Face to Face: ASME B16.10
Bore Type: Full Bore or Reduced Bore
End Connection: RTJ Flanged
Trim Material: ASTM A182 F6A, ASTM A182 F304, ASTM A182 F316, ASTM A182 F51, ASTM A182 F53, ASTM A182 F55, ASTM A105+ENP, ASTM A350 LF2+ENP
Test and Inspection: API 598, API 6D
Seat Insert: RPTFE, DEVLON, NYLON, PEEK
Key Features
1. Double Block & Bleed (DBB): Provides two barriers for safe venting or bleeding of pressure.
2. Anti-Static Device: Prevents static buildup, enhancing safety in hazardous environments.
3. Fire-Safe Design: Maintains functionality during and after fire exposure.
4. Anti-Blowout Stem: Prevents stem ejection under pressure for added safety.
5. Emergency Sealant Injection: Enables sealing material injection during leakage emergencies.
6. Low Emission Compliance (Optional): Minimizes fugitive emissions for sensitive applications.
7. Double Isolation & Bleed (DIB) Functionality (Optional): Enhances isolation with two seating surfaces for improved safety.
Product Range
Body Material: Carbon Steel, Stainless Steel, Alloy Steel
Normal Diameter: 1/2 Inch - 48 Inch (DN15 - DN1200)
Pressure Range: Class 150 LB - 2500 LB
End Connection: Raised Face (RF), Ring-Type Joint (RTJ), Butt Weld (BW), Hub
Working Temperature: -26°C - +150°C
Operation: Manual (lever, gear), Pneumatic Actuator, Motor Actuator
