The characteristics of flexible waterproof. Waterproof casing seal cancelled the ordinary spring the influence of the sealing ring of the sealing ring, suitable medium and temperature greatly expanded, usually ordinary mechanical seal ring seal materials in organic compounds, such as teflon rubber these organic compounds in some medium, in conjunction with medium body produces chemical reaction, under the condition of low temperature and high temperature, will change its physical properties, make the seal failure, produce sclerosis and bellows seal is not restricted by the above factors, generally applicable to benzene, ketone, alkenes, alkanes and general many media such as oil, acid, alkali salt, temperature range can also be by - 250-400, of course, it also need a strict selection of waterproof casing repair welding and hot. The company mainly produces waterproof casing series products have, rigid waterproof casing, flexible waterproof casing, flexible waterproof casing, lengthened closed waterproof casing, etc., we can according to customer requirements can be customized a variety of different waterproof casing.