DME resistant valve Y-ring

   The cross-section of the Y-shaped sealing ring is Y-shaped and is a typical lip-shaped sealing ring. It is widely used in reciprocating sealing devices, and its service life is longer than that of O-rings. 

     The Y-shaped sealing ring is attached to the coupling surface of the sealing pair by its open lip. When there is no internal pressure, only a small contact pressure is generated due to the deformation of the lip tip. In the case of sealing, there is a normal pressure equal to the medium pressure at each point in contact with the sealing medium, so the bottom of the lip ring will be compressed axially, the lip will be compressed circumferentially, and the contact with the sealing surface will become wider, At the same time, the contact stress increases. When the internal pressure rises again, the distribution form and size of the contact pressure are further changed, and the lip and the sealing surface cooperate more closely, so the sealing performance is better, which is the "self-sealing effect" of the Y-ring.