Journal of Engineering Research

Aiming at the problem of water seepage due to the decline of sealing performance of the explosion-proof changeover switch under the high humidity working environment, the sealing performance of nitrile rubber, the sealing material used in this product, is investigated. In order to strengthen the sealing effect, in addition to the sealing ring, another room temperature curing silicone rubber and liquid sealant are used to seal the sealing surface for auxiliary sealing treatment. At the same time, the sealing performance of nitrile liquid sealant and 708 silicone rubber was tested and judged under high humidity conditions. The results show that: nitrile seals alone under high humidity environment still in the existence of seepage and leakage, but with or alone use of nitrile liquid sealant or 708 silicone rubber, no seepage and leakage.

Nitrile rubber; High humidity; Liquid sealant; Organic silicone rubber