Abstract
Subsea oil production gate valve and its actuator are introduced. Seals for the valve seat and element are studied and the seal principle is given. The seal of valve cover is designed, which is composed of a Parker B3 seal ring, two Parker BD seal rings and a copper retainer ring superposed together. The seal of balance bar is designed, which is similar to the seal of valve cover, but without a retainer ring. The piston seal, consisting of a Parker B7 ring and a FR guide ring end seal, is designed. To validate all the seals designed, the finite element models are set up, the stress, deformation and contacting pressure of the seals are analysed. Results show that the strength of the seal is enough and the seal is reliable.
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