Lanzhou High Pressure Valve Co., Ltd (formerly Lanzhou High Pressure Valve Factory, short for LZHPV) affiliated to Langao Group, was a state-owned enterprises founded in 1938, it reformed as non-public enterprises in 2003 with the strong support of provinces, municipalities and districts department at all levels, LZHPV was only one high-tech enterprises in northwest of China combines ’high temperature, high pressure, high alloy, low temperature, large diameter’ valves (referred to as "three high and one low one large") research and development, design,manufacturing and sales. LZHPV registered capital of 100 million RMB, covers an area of 260,000 square meters, and 560 emplyees, including 90 engineering and technical personnel, 26 senior engineers, 8 professors engineers and more than 40 engineers, 3 experts enenjoy state special allowance. and set up research and development system with Tsinghua University and Lanzhou Science and Engineering University. Now LZHPV has 58 new products obtained national patents (including 8 invention patents), supply a number of valves for major national projects, fill the domestic valve industry ‘domestic instead of import’ technology blank, LZHPV valves has been highly recognized by new and old customers. It is widely used in various harsh conditions such as petroleum, chemical industry, coal chemical industry, natural gas, metallurgy, coking, aerospace and military industry. The sales network covers the whole country and is exported to Russia, Germany , Kazakhstan, the Middle East and other countries and regions.