Hard seal butterfly valve refers to the hard seal with metal materials or other hard materials on both sides of the sealing pair.

Knife gate valve can only be used to cut off rather than to throttle, and gate valve can throttle or switch.

Installation environment and maintenance precautions of butterfly valve

304 austenitic stainless steel (new standard 06Cr19Ni10 steel, old standard 0Cr18Ni9 steel) is widely used in petrochemical, metallurgical machinery,

The installation of safety and relief valves in pressure vessels and the use of stop valves upstream and downstream are considered to be the last line of defense for equipment with internal pressure greater than atmospheric pressure.

Electric gate valve is a widely used valve, which is mainly used in analog quantity regulation of medium flow in liquid, gas and air systems.

In winter, the temperature drops rapidly, and the valve often freezes. At this time, if it is not handled, the pipeline will be prone to failure.

When using the relevant mechanical equipment, if some wrong methods are used, the equipment will be seriously injured.

Valve welding inspection is generally divided into two parts:

Carefully read the valve manual to understand the basic structure and principle.

If there is leakage beyond the rated range between the valve disc and the valve seat of the safety valve, it will lead to the loss of the medium,

Check valve refers to the valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium,

A key national oil and gas infrastructure project, Changqing Oilfield Sudong 39-61 gas storage was officially completed and put into production.

Welding slag, rust, slag, etc. in the pipeline cause blockage or jam in the throttle, guide part, and balance hole of the lower bonnet

With the development of society and economy, the use of valves is becoming more and more extensive, and there are many varieties of valves used in pipelines.