Lubrication system for a gate valve

A lubrication system for a gate valve having a moveable gate and a gate sealing element located between first and second housing sections, wherein the gate is moved by energizing an actuator, the lubrication system comprising:

• first and second cartridges each having a lubricant for lubricating the gate sealing element;
• first and second plunger elements for moving the lubricant from the first and second cartridge, respectively, to the gate sealing element;
• first and second lubricant passageways located between the first and second plunger elements, respectively, and the gate sealing element for supplying the lubricant moved by the first and second plunger elements to the gate sealing element,
• first and second plunger contact members attached to the gate by an attachment element;
• and a clevis attached to the gate, wherein the first and second plunger contact members are attached to the clevis,
• wherein the first and second plunger contact members engage the first and second plunger elements, respectively, and
• wherein energizing the actuator causes movement of the gate and corresponding movement of the first and second plunger elements to cause the lubricant to move from the first and second cartridges to the gate sealing element.