With the gradual increase in demand for oil and gas products worldwide and the almost exhaustion of oil and gas resources, the collection, transportation and processing techniques and requirements of oil and gas products have become increasingly complex, costly, and face more and more individual technical requirements . Nowadays, the oil and gas industry is subject to policy restrictions on environmental protection, long distances, strict environmental geography, etc., as well as attention from government regulations, resulting in increasingly complex business operations.

The chemical industry occupies an important position in the national economy of various countries and is the basic industry and pillar industry of many countries. The development speed and scale of the chemical industry have a direct impact on all sectors of the social economy.

Our company is a high-paying technology enterprise integrating professional casting, production and sales. Located in Binhai Park, Wenzhou Economic and Technological Development Zone, Zhejiang Province, it occupies an area of 30,000 square meters, has more than 200 employees, more than 30 various technical personnel, registered capital of 20 million, fixed assets of 70 million, and annual output value of more than 120 million yuan. Since the company was founded in 2001, it has consistently adhered to the principle of "survive by quality, market by reputation, and development by technology". The company has a mature production process system and management system. It has successively obtained IS09001: 2008, ISO/TS16949 quality system certification and other certificates. The main products are various stainless steel valves such as national standard, American standard, Japanese standard and Korean standard. Products are widely used in petroleum, chemical, pharmaceutical, electric power, water power, food and other industries. Products are exported to Europe, America, Southeast Asia and other regions. It is well received by users from all over the country and all over the world.

The high-pressure safety valve is a safety protection valve, and its opening and closing parts are normally closed under the action of external force. It is divided according to the structural form, which is divided into plumb type, lever type, spring type and pilot type; according to the structure of the valve body, it can be divided into two types: closed type and non-closed type. The following are the items that should be paid attention to when installing the high-pressure safety valve: 1. For boilers with a rated evaporation capacity greater than 0.5t/h, at least two safety valves should be installed; for boilers with a rated evaporation capacity less than or equal to 0.5t/h, at least A safety valve; for boilers with a rated steam pressure less than or equal to 3.82MPa, the safety valve throat diameter should not be less than 25mm; for boilers with a rated steam pressure greater than 3.82MPa, the safety valve throat diameter should not be less than 20mm.