Oxygen special globe valve is a kind of globe valve specially designed for oxygen system, which plays a key role in the process of oxygen delivery, storage and use. The following is a detailed introduction to the special globe valve for oxygen:

Definition and use

Oxygen special globe valve, also known as oxygen check valve, oxygen check valve, mainly used to stop the medium (such as oxygen) reverse flow device. It is widely used in industrial water supply, fire-fighting system, boiler water supply and condensate system, as well as petroleum, chemical industry, metallurgy and other production processes, play a role in safety protection and media control.

The working principle

The working principle of oxygen special globe valve is to change the flow resistance of the fluid flowing through the valve by changing the clearance (i.e. opening degree) between the valve spool and the valve seat, so as to achieve the purpose of regulating the flow. When the valve is closed, pressure needs to be applied to the valve flap to force the sealing surface not to leak. When the medium enters the valve from below the valve flap, the operating force needs to overcome the thrust generated by the medium pressure and the friction between the valve stem and the packing.

Third, structural features

Seal form: Oxygen special globe valve usually adopts forced sealing type, that is, when the valve is closed, it needs to rely on external force to force the valve flap to the valve seat, in order to ensure that the sealing surface of the sealing.
Material selection: Since oxygen has flammability, the material of oxygen special globe valve needs to choose good flame retardant material, such as stainless steel, copper alloy and so on. At the same time, all valve parts in contact with oxygen need to go through strict degreasing and oil ban measures before assembly.
Anti-static equipment: Some oxygen special globe valves are equipped with electrostatic conductive equipment to avoid sparks due to static electricity and increase safety.
Dust-proof, water-proof and oil-proof device: the bracket part of oxygen special globe valve usually adopts closed structure, and the protective cover on the bracket can be opened when the packing is clamped, which plays the role of dust-proof, water-proof and oil-proof.

Performance parameters

The performance parameters of the oxygen special globe valve include nominal diameter, nominal pressure, applicable temperature, applicable media and so on. Specific parameters vary according to different models and specifications of the valve, the user should be selected according to the actual needs to determine.

V. Selection and installation

Selection: In the selection, the user needs to be based on the nature of the media used (such as oxygen), the working pressure, working temperature and piping system requirements and other factors to determine the appropriate type and specifications of the oxygen shut-off valve.
Installation: Oxygen globe valve should be installed in a location that is easy to operate and maintain, and ensure that the switching direction of the valve is consistent with the direction of flow of the medium in the pipeline. In the installation process, attention should also be paid to the cleaning of the valve and sealing surface protection to avoid damage or contamination.

Sixth, maintenance and repair

In order to ensure the normal operation and prolong the service life of the oxygen special globe valve, the user needs to regularly maintain and repair the valve. Specific content includes:
Regularly check the sealing performance of the valve, if there is a leakage should be dealt with in a timely manner;
Clean the dirt and debris on the surface of the valve to keep the valve clean;
Lubricate the lubrication part of the valve to ensure the flexibility and reliability of the valve;
Regularly check whether the fasteners of the valve are loose or damaged, if so, they should be replaced or tightened in time.
Oxygen special globe valve has an important role in the oxygen system. Users should choose the appropriate models and specifications according to the actual demand, and strictly follow the operating procedures for installation, use and maintenance.