Front loaded seat seal

A method comprising:

• receiving, by a sealing assembly forming a circumferential seal between a seat and a valve body, a first force from a collar disposed on the seat in response to a first movement of a gate, the collar disposed at least partially within a recess formed in a first surface of the seat and configured to form a lower stop of a guidance area;
• preventing, with the circumferential seal, fluid from entering a gate cavity of the gate;
• moving, in response to receiving the first force, the sealing assembly in a first direction of the first force;
• receiving, by the sealing assembly, a second force from an overhanging edge of the seat, in response to a second movement of the gate;
• and
• moving, in response to receiving the second force, the sealing assembly in a second direction of the second force.

A method comprising:

• moving a gate disposed in a valve body between an open position and a closed position, the open position allowing fluid to flow from a first port to a second port of the valve body;
• maintaining a seal between a seat and the gate while moving the gate, the seat forming a circumferential seal with the valve body and a face seal with the gate, the maintaining the seal comprising transmitting a first force and a second force, the transmitting the second force including engaging a sealing assembly disposed around the seat with an overhanging edge of the seat, the overhanging edge defining a maximum diameter of the seat that is greater than an outer diameter of all other outer surfaces of the seat;
• and
• preventing, with the circumferential seal, fluid from entering a gate cavity of the gate.