Globe Valves - Extended Bolted Bonnet for Cryogenic Service | Fluitek Fluitek Valves - 1
Globe Valves - Extended Bolted Bonnet for Cryogenic Service | Fluitek Fluitek Valves - 1

Globe Valves - Extended Bolted Bonnet for Cryogenic Service | Fluitek

Cryogenic Globe Valve Extended Bolted Bonnet Fluitek

Globe valve with extended bolted bonnet for cryogenic operation below -50°C. The bonnet extension isolates the packing from low-temperature zones, minimizing freezing, thermal stress on packing, and handling difficulties. Low-temperature testing available per BS 6364:1984 Appendix A.

Construction and Materials

  • Standardization: ANSI
  • Connection: butt weld
  • Pressure Class: ASME/ANSI 600#
  • Body Materials: Austenitic stainless steels
  • Examples: CF8/CF3, CF8M/CF3M
  • Sealing: Metal seats or soft inserts, typically PTFE-based

Applications

Used in cryogenic pipelines for LNG, LIN, LOX, LAR, technical gases, air separation units, and cold box modules. For oxygen service, special cleaning procedures, purity checks, and avoidance of contaminants reactive with oxygen under pressure are required.

ANSI 600# Reference Dimensions

Technical sheet provides sizes 3"–12", bore 76–300 mm, face-to-face 283–502 mm, height from centerline to top 1138–2040 mm, and weights 62–565 kg.

Selection Criteria

Selection should be based on media, temperature, pressure class, soft or metal seat requirement, purity for oxygen service, installation capability in cold box, and required access for packing handling/maintenance.

Certifications

Available compliances: ISO 9001:2015, PED 2014/68/EU, ATEX 2014/34/EU, IEC 61508 SIL, API 6A, API 6D, API 6DSS, TR-CU.

FAQ

Why extended bonnet in a cryogenic valve?

For thermal isolation of packing from the cryogenic body and more stable stem operation.

Can it be installed in a cold box?

Yes, a mounting plate is available upon request for cold box installation.

Standard (Options)
  • ANSI
Connection (Options)
  • Butt Weld
Material (Options)
  • Austenitic Steels
Pressure Rating (Options)
  • 600 lbs

Datasheet and documents

Description

FLUITEK ORSENIGO VALVES provides considerable experience in the production of gate valves for low temperature service (below -50°C). Low temperature test in accordance with BS 6364:1984 Appendix A is available.

Standard materials are austenitic steels (e.g. CF8/CF3; CF8M/CF3M) with metal seals and /or soft inserts (usually based on PTFE). The implementation requires extremely accurate machining for a smooth functioning of the valve in service. A special kind of service is the oxygen service in the air liquefaction plants. For that application FLUITEK ORSENIGO VALVES has developed a procedure and a dedicated production shop. The valves are cleaned and treated in order to meet the industry requirements, with the capability of performing quantitative verification of the degree of cleanliness.

The valves are supplied on request with mounting plate for installation in “cold box”.

Certifications

Fluitek SRL Company Quality Policy 11-2022 – ENG