LF2 LCB ultra-low temperature flange high pressure gate valve

Key selection points for ultra-low temperature gate valves

LF2/LCB ultra-low temperature flange high-pressure gate valve is used for pipeline systems that require low-temperature materials and low-temperature structural design. The current product parameter table model is DWZ41W, and the materials are listed as LF2 and LCB. The specific minimum design temperature, pressure rating, and flange standards must be confirmed based on actual product data and project technical conditions.

Low temperature materials cannot be solely determined by their material names

Low temperature conditions require simultaneous verification of material grade, material condition, minimum design temperature, and pressure temperature rating. LF2 and LCB belong to different material systems. The actual materials for valve bodies, valve covers, and other pressure bearing parts should be based on the specific design and order BOM.

Valve cover, valve stem and packing

Ultra low temperature media may impose additional requirements on valve cover structure, stem length, packing, and sealing. Whether to use an extended valve cover and the specific structural dimensions need to be confirmed based on the minimum design temperature and project specifications, and cannot be directly applied using a universal template.

The sealing material needs to be confirmed separately

Seals, packing and gaskets are selected for the minimum service temperature, process medium and valve design. Their low-temperature suitability must cover the intended operating conditions.

Special media such as liquid oxygen

If used for special media such as liquid oxygen, it is necessary to separately confirm material compatibility, cleaning and degreasing requirements, and project applicable specifications, and cannot be directly determined as usable based solely on the name of "low-temperature gate valve".

For more low-temperature products, please refer toLow temperature valve column, and can be referred toInstructions for use and selection of ultra-low temperature flange high pressure gate valve。

Frequently Asked Questions

Does the ultra-low temperature gate valve use PTFE or fluororubber seal by default?

We cannot assume it this way. The specific sealing material should be confirmed based on the actual minimum temperature, medium, and product design.

Do low-temperature gate valves require extended valve covers?

Whether to adopt an extended structure depends on the minimum design temperature, valve structure, and project specifications, and should be determined according to specific technical conditions.

Can ordinary low-temperature gate valves be directly used for liquid oxygen working conditions?

It is not enough to judge solely based on the low temperature level, and it is also necessary to confirm the compatibility of oxygen medium materials, cleaning and degreasing, and project safety requirements.