The development of the high temperature brake pneumatic valve

for large high temperature and the successful development of pneumatic valve has good economic and social benefits. Keywords large ethylene cracking unit seal disc pneumatic valve ring of the telecommunications authority of qilu ethylene cracking of large high temperature pneumatic valve ( Mm) The furnace cracking furnace is a key component. This is in charge of working conditions, if there are any damage, must be cracking furnace interrupt, seriously hindered the ethylene production. In order to guarantee the normal operation, have to spend huge foreign exchange each year, the pneumatic valve from abroad. In order to develop the special pneumatic valve, pneumatic valve fill cannot from the mid - we put forward the thought the production localization of blank. By China petrochemical corporation, the domestic technical force, marketability, the required production equipment and testing means complete, the quality assurance system, with independent scientific research task is complete unit are studied, screening can realize large-scale ethylene cracking, finally confirm the high temperature furnace pneumatic valves. Targeted, sent out a development plan, the formation of the development team, explore the implementation of the technical work plan and the dimension chain calculating a year later, one and a half of hard struggle, finally successfully trial-produced at the gate. Sinopec group of examination and acceptance of the organizer of production device operation certificate, more than one year of domestic brake pneumatic valve fully meet the needs of the production of the imports to meet, here is a brief to introduce what is related to the quality standards. High temperature pneumatic valve parts localization, the article describes a large high temperature closed door type pipe, pneumatic valve pneumatic valve, pneumatic valve plate, pneumatic valve, bearing, the basic structure of the pneumatic valve, pneumatic valve cover under the hood and stems, ring, BA and hand ten most catheter based devices. In this, bearing and catheter, pneumatic valve, pneumatic valve cover, the pneumatic valve cover and pneumatic valve cover pressure easy to convert and positioning to deal W Cong bin, the casting performance is good, processing is a shot of the problem, it is not difficult to domestic. Ba type device can be used to manually specify machinery factory - mechanical and electrical department Tianjin pneumatic valve by BA - manually Type of equipment, product quality and good reputation is higher. Dries, the choice of the domestic stainless steel material CR and mm length of dry, mm in diameter, slender shaft parts, hot - Human resources, processing and storage method, should avoid bending rigidity. And noted that the dry of the main elements of power, must pass a qualified after the production of all kinds of pressure calculation. In the large high temperature pneumatic valve, made all the most difficult places, there are two - in a year The pneumatic valve plate and seal. The following will be highlighted. Manufacturing pneumatic valve plate pneumatic valve plate processing complete raw materials used in figure found in pneumatic valve pneumatic valve plate in Japan with Sue S J line of stainless steel equipment introduced in the original standard. After repeated research, decided to adopt the domestic stainless steel lCrN iT I replace Sue S stainless steel. Due to the chemical composition and mechanical properties of stainless steel is very close.