Pracrice has proved that usaling ring made of polytetrafluoroethylene in combination with sealing ring made of oil-immersed rubber can solve t...

• 实践证明,采用聚四氟乙烯密封圈和耐油橡胶密封圈组合,可以很好地解决阀门阀杆密封的渗漏问题。