Seat Rings: Seat rings are seal welded to eliminate leak path behind rings and for long trouble-free service. The surfaces are precision ground to fit accurately with the disc.

• 阀座环:阀座环境过密封焊接,可消除环后的泄漏通道,延长无故障工作的寿命。表面经过精密研磨以精确配置阀瓣。