What qualifications should safety valve manufacturers have?

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Summary. According to the relevant provisions of the production license, the quality and technical supervision bureaus of all provinces, autonomous regions and municipalities directly under the central government are the only authorized issuing units for industrial product production licenses in the country. Within 10 working days after the AQSIQ approves the list of certified enterprises, the certificate will be printed and sent to the quality and technical supervision bureaus of all provinces, autonomous regions and municipalities directly under the Central Government, and the relevant information of the certified enterprises will be published free of charge on the AQSIQ**.

The publication and issuance of the certificate does not charge any fees to the enterprise, and it is illegal for any other unit or individual to ask for fees from the enterprise in the name of issuing the certificate or announcement, so please protect your own interests and beware of being deceived.

Check the list of certified products that currently implement the management of industrial product production licenses, and the fire protection wind and silver smile and fire dampers do not need to apply for industrial product production licenses.

It is recommended to consult the local Municipal Bureau of Quality and Technical Supervision

According to the relevant provisions of the production license, the quality and technical supervision bureaus of all provinces, autonomous regions and municipalities directly under the central government are the only authorized issuing units for industrial product production licenses in the country. Within 10 working days after the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China approves the list of certified enterprises, complete the printing of the certificate and send it to the Yinhuai Quality and Technical Supervision Bureau of all provinces, autonomous regions and municipalities directly under the Central Government, and publish the relevant information of the certified enterprises free of charge on the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China. The publication and issuance of the certificate does not charge any fees to the enterprise, and any other unit or individual in the name of issuing the certificate or announcement to the enterprise to ask for the breakfast fee is illegal, please protect your own interests and beware of being deceived.

Ask about custom messages].

Before installation, you should carefully check whether the model and specifications meet the design requirements, check whether the valve stem and valve disc are flexible, whether there is any jamming and improper phenomenon, and the valve disc must be closed tightly.

For installation, the strength and tightness of the valve must be tested, and the unqualified ones shall not be installed. The valve test requirements shall be carried out in accordance with the relevant specifications. The valve stem on the horizontal pipeline should be vertically or 45 degrees to the left and right, and it can also be installed horizontally, but not downward; The valve stem on the vertical pipe must be installed in the direction of the operating circuit line.

The valve should be installed in a closed state, and pay attention to the characteristics of the valve and the flow direction of the medium.

When the valve is connected with the pipeline, the connecting bolts on the flange shall not be forcibly tightened, and the thread of the valve shall be intact for the threaded valve, and the hexagonal body at one end of the valve should be clamped with a wrench when tightening. When installing the gate valve, the valve should not be installed upside down.

The installation of check valve should pay attention to the flow direction of the medium and must be installed horizontally.

When installing the safety valve, it is also necessary to pay attention to its verticality and not to be biased.

The final adjustment of the safety valve should be carried out on the system, and the opening pressure and return pressure should comply with the provisions of the design documents, and fill in the "safety valve adjustment test record."

1) Assembly conditions: After all valves are cleaned, inspected, repaired or replaced, their dimensional accuracy, mutual position accuracy, finish, material properties and heat treatment and other mechanical properties should meet the technical requirements before they can be assembled.

2) Assembly principle: the general situation is to dismantle the first and then install, after the disassembly of the first installation, to find out the nature of the match, do not knock and beat, the operation is in order, first inside and then outside, from the bottom up, first easy and then difficult, first parts, components, mechanisms, and then the upper cover pressure test.

3) The effect of assembly: proper matching, correct connection, complete valves, bolt tightening, flexible opening and closing, accurate indication, reliable sealing, and adaptation to working conditions.

In order to unify the administrative licensing of domestic and foreign safety valve manufacturing, the Special Equipment Licensing Office of the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China issued Announcement No. 7 on March 29, 2006, requiring that before the promulgation of the safety valve manufacturing license conditions, the on-site appraisal and review should be carried out in accordance with the requirements of Chapter VI of the "Boiler and Pressure Vessel Manufacturing Licensing Conditions" (Guo Qianjian Guo [2003] No. 194). Since January 1, 2007, TSG ZF001-2006 "Safety Valve Safety Technical Supervision Regulations" promulgated and implemented, the implementation of unified requirements for the manufacturing license of domestic and foreign safety valves, in the future, the appraisal and evaluation agencies should return to the air in strict accordance with the requirements of the regulations for review, in the review process, in addition to the implementation of the "boiler and pressure vessel manufacturing license leakage conditions" (national quality inspection pot [2003] No. 194) in the sixth chapter requirements, should also be strictly in accordance with the "safety valve safety technical supervision regulations" requirements. Special conditions for safety valve manufacturing license:

1) All types of safety valves applying for manufacturing licenses shall pass the type test. (2) There should be a large enough warehouse to classify and store semi-finished products and purchased parts of different types and specifications, such as valve bodies, valve covers, springs, etc. (3) There shall be lifting, transportation, welding and non-destructive testing equipment suitable for the manufactured products, including welding consumables storage, drying facilities and surfacing welding equipment that meet the requirements; There should be machining equipment that is suitable for the manufactured products to ensure the processing accuracy.

4) There should be spring heat treatment equipment and spring strong pressure treatment equipment and test equipment that are suitable for the loss of manufactured products. (5) There should be grinding equipment and corresponding surface processing quality testing equipment necessary to meet the manufacturing requirements. (6) Geometric measuring instruments for parts and components that should meet the necessary safety accessories to meet manufacturing requirements.

7) There should be water pressure test equipment and air tightness test equipment necessary to meet the manufacturing requirements. (8) There should be a setting pressure test device suitable for the manufactured products. (9) The manufacture of spring-type safety valves should have a full-performance test bench.

Other forms of safety valves should have corresponding performance test devices. (10) There shall be a test device for the chemical composition analysis and mechanical properties of metal materials.

The General Administration of Quality Inspection, Inspection and Quarantine of the People's Republic of China has announced the type test organization of the safety valve in accordance with the requirements of Annex D of the "Safety Technical Supervision Regulations" in accordance with the requirements of Annex D of the "Safety Technical Supervision Regulations". According to the requirements of Appendix B of TSG ZF001-2006 "Safety Valve Safety Technical Supervision Regulations", if the safety valve manufacturing unit does not adopt the Chinese national standard or industry standard to manufacture the safety valve, it shall submit the standard state standard text (English or Chinese) to the corresponding acceptance agency together with the application materials, and submit it to the type test institution for review during the type test.

The safety valve is a special component used to protect equipment, pipelines, pressure vessels, etc. from overpressure operation and prevent equipment damage. For example, safety valves used in industrial pipelines, safety valves installed in certain equipment (air compressors, hydraulic systems, pneumatics, etc.).

Usually what we call safety valves generally refer to "industrial valves safety valves", which belong to the valve category.

Safety valve is one of the major categories of valves, and it is also a special valve, which has much higher requirements than general valves.