Valve seal assembly

An arrangement for providing a seal for a valve, the arrangement comprising:

• a seat having an anchor portion, a connection portion extending radially from the anchor portion, and first and second sealing elements extending from opposing sides of the connection portion in a generally axially-aligned orientation;
• first and second energizers respectively arranged on opposing sides of the connection portion, each of the first and second energizers respectively positioned between the first and second sealing elements and the anchor portion of the seat and supported in generally axial alignment relative to each other;
• and
• first and second retainers that are distinct from the seat and in contact with the first and second energizers, respectively,
• the first and second retainers disposed fully within respective first and second cavities defined by the first and second sealing elements, respectively, and the connection portion, and
• wherein the first sealing element defines a first protrusion extending radially a first distance and the second sealing element defines a second protrusion extending radially a second, smaller distance, and further wherein each of the first and second sealing elements defines a lip axially outward of the first and second protrusions that is configured to radially overlap with an edge of a void in a valve body.

A valve comprising:

• a body defining a body cavity;
• an obturator arranged within the body to selectively inhibit flow through the body;
• a seat having an anchor portion, a radially extending connection portion, and first and second sealing elements each extending from the connection portion arranged within the body cavity;
• a first energizer positioned between the first sealing element and the anchor portion of the seat within a first seat cavity of the seat and a second energizer positioned between the second sealing element and the anchor portion of the seat within a second seat activity;
• and
• first and second retainers that are distinct from the seat and positioned between the respective first and second energizers and the anchor portion of the seat within the respective first and second seat cavities, the first retainer and the first sealing element each contacting a surface of the body cavity,
• the first sealing element, the first energizer, the first retainer, and the body defining a gap along the seat cavity.