Our company are specialized in vacuum products' development and production. Located in the Jiading District of Shanghai, Shanghai ZHIYUAN vacuum electric devices Co. Ltd has been specialized in manufacturing vacuum electric devices for many years. Our company covers 16000 square meters and is only 12 kilos to the Shanghai International Circuit , Our main products are: High and low pressure vacuum electric appliance switch, high and low pressure vacuum switching valve and other some switches fitting. The product widely uses in the coal mine, Smelting metal, chemical industry, electric power, petroleum, cement. Independent research and development big electric current vacuum contact device CKJ5 - 800 ~ 1250/1140V, JCZ8 - 250 ~ 630/12kV high pressure contact device (throws cuts condenser current is 200A, and already through experiment),The CKJ20 - 63.0/114 million vacuum contact device, is replaces the CJ20 air type contact device the leading product.