Product Model: D343W/H 

Nominal Diameter: DN40~2000 mm

Nominal Pressure: PN.6~4.0MPa 

Applicable Temperature: -29~425℃ 

Applicable Media: Water, steam, oil, etc.

Body Material: Carbon steel, Stainless steel

Seat Material: Stainless steel, Stellite alloy, Tungsten carbide, Nickel alloy, Monel

Disc Material: Carbon steel, Stainless steel, Alloy steel

Product Overview
A cryogenic butterfly valve refers to a butterfly valve that can be used under cryogenic working conditions. Valves with a working temperature below -40°C are generally called cryogenic butterfly valves, mainly used in chemical plants such as ethylene and LNG. The output liquid cryogenic media such as ethylene, liquid oxygen, liquid hydrogen, LNG, and LPG products are not only flammable and explosive but also gasify when heated, expanding hundreds of times in volume during gasification. The cryogenic butterfly valve is one of the indispensable and important equipment in industries such as petrochemicals, air separation, and natural gas. Its quality determines whether production can be carried out safely, economically, and continuously.

Product Features

1. According to working condition requirements, cryogenic butterfly valves have top-entry and side-entry structures, with connection types such as flanged, wafer, butt weld, and lug.

2. Based on the flammable and explosive characteristics of cryogenic media such as LPG and LNG, cryogenic butterfly valves are designed with fire-safe and anti-static measures.

3. For temperatures higher than -50°C, the extended neck structure is generally not adopted; for valves with temperatures below -50°C, the extended neck (long bonnet) structure is adopted.

4. Cryogenic butterfly valves are suitable for the management systems of cryogenic liquid storage and transportation equipment, featuring flexible opening/closing and reliable sealing. They can also be used in management systems for other cryogenic and ultra-low temperature media.

5. The driving modes of cryogenic butterfly valves are manual, worm gear, pneumatic, or electric.

6. Top-entry cryogenic butterfly valves can be maintained online, making maintenance convenient.

Design Specifications

• Design Standards: API 609, GB/T 12238, JB/T 8527, GB/T 24925, BS 6364

• Face-to-Face Dimensions: API 609, ASME B16.10, GB/T 12221

• Connection Standards: ASME B16.5, ASME B16.47, ASME B16.25, GB/T 9113, HG/T 20592

• Inspection & Testing: API 598, GB/T 13927, JB/T 9092, GB/T 26480

• Pressure & Temperature Rating: ASME B16.34, GB/T 12224

Performance Parameters

• Body Material: Carbon steel, Stainless steel, Alloy steel

• Nominal Diameter: NPS 3"–NPS 48" / DN80–DN1200

• Pressure Range: CL150–CL900 / PN6–PN150

• Working Temperature: ≥ -196°C

• Application: Mainly used for the output of liquid cryogenic media such as ethylene, liquid oxygen, liquid hydrogen, LNG, and LPG products.