NingBo ZhengXin(ZX) pressure vessel Co.,Ltd. is a leading manufacturer of high pressure gas cylinders and valves located in No.1 JinHu East Road, HuangJiaBu Town, YuYao City, China,with its sales office in Shanghai, China. Over 20 million reliable cylinders are made by ZX and in service all over the world. We donate ourselves into the research and development of cylinders and valves since 2000, aiming to provide excellent quality products for beverage, scuba, medical, fire safety and special industry.