We are specialized in the manufacutre of pressure and vacuum relief valves and flame arresters, as well as safety protection devices for liquid petroleum and petroleum products storage tanks, waste gas burning system for sewage treatment, nitrogen blanketing systems for automatic nitrogen sealing devices explosive venting system, and other related products. We have been cerified by the Small Business Administration as a new-technology-development enterprise, as a result of our efforts to supply customers with excellent products. All the staff of our company are making every effort to make quality products to meet the needs of customers, through continuous technical development. We promise to do our best to give our customers satisfaction, from the engineering of the high world standard to perfect after-sales service.