Manual liquid nitrogen low-temperature cryogenic treatment American standard flange ball valve

DQ41F manual low-temperature American standard flange ball valve

This product adopts manual operation and low-temperature flange ball valve structure. The series diameter range is DN25-DN800, pressure is PN16/Class150, and material fields include LF2 and F304. The specific minimum design temperature and product structure should be based on the product technical data and order requirements.

What information is required for selecting low-temperature ball valves?

In addition to the diameter and pressure rating, it is also necessary to clarify the minimum design temperature, medium, main body material, ball and stem material, seat and packing structure, valve cover form, and corresponding low-temperature test requirements.

Can a regular manual ball valve be used for flow regulation?

Ordinary ball valves are mainly used for opening, closing, and cutting, and the ability to stop the handle in the middle position does not necessarily mean that it is suitable for long-term throttling. If continuous adjustment is required, the structure and actual flow characteristics of the ball core and valve seat should be confirmed.

Liquid nitrogen, liquid oxygen, and ethylene working conditions cannot be directly mixed

Different low-temperature media have different requirements for materials, safety, and cleaning, especially oxygen media, which also need to consider material compatibility and degreasing cleaning. A low-temperature ball valve cannot be uniformly described as applicable to all low-temperature media without verification.

For more low-temperature products, please refer toLow temperature valve selection。

Frequently Asked Questions

Can manual low-temperature ball valves be used for liquid oxygen?

It cannot be directly determined, and it needs to meet the requirements of material compatibility, cleaning and degreasing, and project safety.

Are LF2 and F304 the same low-temperature material?

No, it belongs to different material systems and should be selected according to the design temperature and project specifications.

Can low-temperature ball valves be half opened for long-term flow regulation?

It cannot be used just like a regular ball valve, continuous adjustment requires special verification of the valve seat and flow characteristics.