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Electromagnetic valve related associations and certifications

UL is a shorthand for Underwriter Laboratories Inc. The UL Underwriters Laboratories is the most authoritative in the United States, and it is also a larger private institution engaged in safety testing and identification in the industry. It is an independent, non-profit professional organization that conducts tests for public safety. It is mainly engaged in product safety certification and business security certification business, its ultimate goal is to obtain a market with a fairly high level of safety, and to contribute to the guarantee of personal health and property safety. UL was founded in 1894. After nearly a hundred years of development, UL has become a world-renowned certification body. It has a complete set of organizational management systems, standards development and product certification procedures.

CSA is the abbreviation of the Canadian Standards Association. It was founded in 1919 and is the first non-profit organization in Canada to set industry standards. Electronics, electrical appliances and other products sold in the North American market require safety certification. Currently, CSA is Canada's largest security certification authority and one of the world's most famous security certification organizations. It can provide safety certification for all types of products in machinery, building materials, electrical appliances, computer equipment, office equipment, environmental protection, medical fire safety, sports and entertainment. Prior to 1992, CSA-certified products could only be sold on the Canadian market. Now CSA International has been recognized as a nationally-recognized testing laboratory by the US federal government.

FM Worldwide provides testing and certification services to industrial and commercial products worldwide through its FM Approvals organization. The "FM Approved" certificate is universally recognized worldwide. He indicates to consumers that the product or service has passed the highest standards of testing in the United States and internationally. The testing and certification products provided by FM are issued by the manufacturers of fire-fighting equipment, electronic and electrical equipment, hazardous area facilities, fire site surveying, signal equipment, building materials, and other products;

The “CE” mark is a safety certification mark and is considered as a passport for manufacturers to open and enter the European market. All products bearing the “CE” mark can be sold within the EU member states without having to meet the requirements of each member country, thus achieving free circulation of goods within the EU member states. In the EU market, the “CE” mark is a mandatory certification mark. Whether it is a product produced by a company within the EU or a product produced in other countries, if it is to be freely circulated in the EU market, it must be affixed with the “CE” mark to indicate the product. Conforms to the basic requirements of the EU's "New Method for Technical Coordination and Standardization" directive. This is a mandatory requirement imposed by EU law on products.

The scope of AZAZ's safety registration certification is the pressure piping component, and valve products are one of its main contents. It is our country's standard. According to the relevant regulations, any pipe-type equipment used to transport gases or liquids with a certain pressure, whose maximum working pressure is greater than or equal to 0.1 MPa (gauge pressure), liquefied gas, steam medium, or combustible, easy Explosive, toxic, corrosive, liquid medium with the highest working temperature higher than or equal to the standard boiling point, and pipes with a nominal diameter greater than 25mm, all need to apply for AZ safety registration.

NEPSI is an international explosion-proof laboratory approved by the International Electrotechnical Commission's IECEx. It is the national safety production Shanghai explosion-proof electrical testing and inspection center authorized by the State Administration of Work Safety Supervision and Administration (National Safety Production Inspection and Inspection Grade A qualification); it is the General Administration of Quality Supervision, Inspection and Quarantine. (AQSIQ) approved the establishment of the national industrial product production license office explosion-proof electrical equipment inspection department explosion-proof instrumentation workstation. The NEPSI laboratory was founded in 1979 and was officially put into operation in 1985. In January 1986, the explosion-proof laboratory was approved by the Ministry of Labor and was officially named "national instrumentation explosion-proof safety supervision and inspection station."

The EX mark is a certification system for explosion-proof equipment. Equipment, systems, and accessories that comply with European Directive 94/9/EC (ATEX Directives) must obtain EX certification. The ATEX directive was enforced on July 1, 2003 and replaced the previous directives 76/117/EEC, 79/196/EEC, 97/53/EEC, and 83/130/EEC. The products covered by the ATEX Directive fall into different groups. Regional classifications are based on the time and frequency of explosive gas presence. Different grades of area have different levels of safety requirements for the product.
MA is a coal safety sign. The National Coal Mine Safety Supervision Bureau is responsible for the supervision and management of mining product safety signs across the country, and implements a safety sign management system for coal mining equipment, materials, instrumentation and other products.

From January 1st, 2002 onwards, for products subject to the implementation of the Coal Safety Mark, the manufacturer must obtain the safety mark certificate before it can engage in the production and sale of the product and use the safety mark. Mining companies strictly prohibit the purchase and use of products without safety signs.

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