Shanghai Sawye Electronic & Machinery Co., Ltd. is specializes in the design, sale, proxy and marketing of high quality products for the petrochemical, the offshore oil, the natural gas applications. The company considerable experience and the good faith management brings high grade for the customer, is safer, the low cost, high-quality service. Shanghai Sawye was established in 2006, HongKong Sawye International Limited was established in 2008. We are the authorized distributor for Oliver Valves products in Oil, Gas and Petrochemical industries since February 2008. We supply all types of instrumentation valves, needle valve, ball valve, check valve, relief valve, double block & bleed valve, valve manifold, tube fittings. These have been applied to petrochemical industry, electric power plants, light industry, papermaking, and offshore oil.