Type A40Y-16C and Type A40Y-16I are used at working temperatures under 420º C and 500º C respectively in equipment and conduit carrying air and petroleum gas. Type 40Y-16P is used at working temperatures less than 200º C in equipment and conduit carrying erosive air or liquid as protective installation for over-pressure. In the event of the pressure inside the equipment and conduit surpassing allowable value, the valve automatically opens, which is followed by full discharge. While the pressure drops to normal parameters, the valve automatically closes to ensure safe operation of equipment and conduit.
This factory was built in August 1983 and is the specialized one of valve producing. The main product is safety valve. They have total 58 sets of machinery processing equipment and equipment-testing instruments. The annual valve output is 1, 800 tons. This factory insists on implementing policy of factory director's responsibility, keeps on the way of "development based on science & technology, credit based on quality", positively exploits and struggles what has made it improved quite rapidly on production and management. The output, volume and profit are increased stable. A set of complete management system of enterprise and quality has been made after implementing the interior reform, basic management and full quality control, this enterprise has successfully got the "certificate of adopting international standard & qualification", valves have been permitted to get national production licens. A21 and A28 type safety valves have got the state patent. To meet the need of implementing quality management and reach quality guarantee, this factory itself has set up the quality system according to the standard of ISO9002-FB/T19002. It has been proved and checked successful in august 1997. With the deepening of quality system, the various management work of the enterprise have been improved and perfected continuously which guarantees the quality of the products out of the factory.
