Insulation valves take good insulation measures for a large number of valves in industrial production, which can not only achieve good energy-saving effect, but also improve the safety and reliability of valves and prolong the service life of valves.
The wide application of stainless steel knife gate valve results from its own characteristics. Firstly, it has good sealing effect and good elasticity of U-type seal gasket; secondly, its full-diameter design has strong passing ability; thirdly, like an knife, it has good breaking effect and can effectively solve the leakage phenomenon after the breaking of the gate containing block, particle and fiber medium; Forth, the knife gate valve are light weight and small room needed; finally, it does not need to remove the valve because of its convenient maintenance without replace the valve seal.
SGV order for Europe plant: Stainless steel knife gate and Carbon steel knife gate valve are bonnet less design: refer MSS SP81 or JB/T8691 (Similar with MSS SP 81 but have more clear definition)
The order have 2 part：
Wafer-lug /wafer flanged type Risting stem Pneumatic Knife gate valve
Emerson (NYSE: EMR) today(Dec 12th, 2018) announced it has acquired Advanced Engineering Valves (A.E. Valves), a leading manufacturer of innovative valve technology that helps LNG customers operate more efficiently. The transaction will enable Emerson, a global leader in automation solutions and technology, to provide its customers with the world’s broadest portfolio of valves to improve process performance and reliability. Terms of the deal were not disclosed.
To test whether stainless steel valves will rust, we can put the same valves in different environments to verify and compare. Generally speaking, if stainless steel valves are placed in relatively dry environments, after long time, the valves are not only as good as new, but also not rusty. But if the valves are placed in seawater containing a lot of salt, they will rust in a few days. Therefore, the corrosion resistance and stainless of stainless steel valves also need to be limited by the use environment. In addition, from the characteristics of stainless steel valve itself, it is stainless because there is a layer of chromium-rich oxide film on its surface to prevent particles such as oxygen atoms from invading and damaging objects, which makes it stainless. But when the film is destroyed by environmental factors, as oxygen atoms enter and iron ions free, stainless steel valve will produce rust.
Several Reasons and Preventive Measures for Flame and Explosion of Oxygen Valve, Pipeline Valve
With the increase of oxygen consumption, oxygen pipelines are used for transport large oxygen. Owing to the long pipeline and wide distribution, combined with the quick opening or quick closing of valves, accidents of combustion and explosion of oxygen pipelines and valves occur from time to time. Therefore, it is essential to comprehensively analyze the hidden dangers and dangers of oxygen pipelines and cold valves and take corresponding measures.
1. Forging raw material should be accompanied by quality certificates (also known as quality assurance certificates). Supplementary inspection should be carried out when there is no quality assurance certificate. Only those who are qualified can be put into production.
2. Forging pieces (referring to raw materials for forging) may be rolled (e.g. round steel) or ingots. If the forged blank is rolled, its surface quality and chemical properties will be improved.
With the rapid development of industrial technology, the valve industry made more stringent requirements, especially for use in cryogenic medium butterfly, in addition to meet the general performance of the valve with a normal condition and, more importantly, in the low temperature under the valve seal reliability, flexibility and movement of cryogenic valves some other special requirements.
1. Valve Welders are special types of work. They can operate independently only after they pass physical examination, professional and technical training, examination and issuance of “Operation Certificate for Special Types of Work”.
2. Welding grounding, prohibiting stacking of inflammable and explosive articles, should be equipped with fire fighting equipment to ensure adequate lighting and good ventilation.