Zhejiang Hongda Special Rubber Products CO.,LTD.
Zhejiang Hongda Special Rubber Products Co., Ltd. is a factory specializing in the production of safety valves, rubber caps, explosion-proof discs, rubber seals and polymer microporous products used in lead-acid batteries, lithium batteries and supercapacitors. We master the core technologies in the industry and always maintain innovation. As a director unit of the battery industry, Hongda participated in the formulation of the industry standard “Valve-regulated lead-acid battery safety valve”; took the lead in drafting and formulating the industry standard “Lead-acid battery exhaust and air filter device technical specifications”, the Zhejiang manufacturing group standard “Valve-regulated lead-acid battery overall safety valve”, and the national standard “Rubber seals used in power lithium battery”.
