• Jiangsu Puyuan Chemical Equipment Co., Ltd. – Specializes in breather valves, flame arresters, and emergency relief valves for storage tanks. Produces Zhq-II series pipeline flame arresters for DN25-500, carbon steel/304/316L construction. Available in IIA/IIB/IIC explosion-proof levels, working pressure up to 42.0Mpa. Compliant with GB13347 and ISO16852 standards. Website: http://www.puyuanchem.com

  • Shanghai Datong Valve – Leading manufacturer of breather valves and tank safety equipment for petrochemical and chemical industries. Products include pressure vacuum relief valves with flame arrester options. Website: [Contact via industry channels]

  • Tanggong Valve Group – Offers breather valves and conservation vents for storage tanks in various materials including carbon steel, stainless steel, and exotic alloys. Pressures up to 42 MPa. Website: https://www.tanggongvalve.com

  • Suzhou Neway Valve Co., Ltd. – Leading Chinese valve manufacturer offering breather valves and tank safety valves for oil & gas and petrochemical applications. API certified. Website: https://www.newayvalve.com

  • Chaoda Valve Group Co., Ltd. – Founded 1984, offers breather valves and specialty valves for storage tank applications. Certified ISO 9001, API 6D, CE/PED. Website: https://www.chaodavalve.com

  • Jiangsu Shentong Valve Co., Ltd. – Publicly listed manufacturer offering breather valves for petrochemical and chemical storage applications. Website: http://www.stvalve.com

  • DERVOS VALVE – Offers breather valves in carbon steel and stainless steel for storage tank applications. CE, ISO9001 certified. Website: https://www.dvsvalve.com

  • Zhongcheng Valve Group – Established 1998, offers breather valves and tank safety equipment for power, petrochemical, and chemical industries. Certified ISO9001, CE, TS. Website: [Contact via industry channels]

  • VALTECCN Valve – Formerly Tianjin TKT Valtec, offers breather valves and tank vents for petrochemical and storage applications. Website: [Contact via industry channels]

  • Anhui Tongdu Fluid Technology – Established 1993, offers breather valves and fluid control systems for industrial applications. Website: [Contact via industry channels]