Abstract: A shock absorbing device is shown having a cartridge attached to a valve, and an actuator. The valve houses a stem which is activated by the actuator to move between an open and a closed position. The actuator includes a cam having a cam surface and a roller which rides along at least a portion of the cam surface. A yoke, which is moved by the roller, is interconnected to a plunger which is attached to the stem. The cartridge includes an upper piston, a lower piston, and a plug having a channel therethrough, positioned between the pistons, the upper piston being spring biased towards the plug. The pistons are positioned in relation to the plug and cartridge housing so as to form an upper and lower reservoir, which are substantially filled with fluid, preferably ethylene glycol. The lower piston is capable of being in contact with the actuator yoke.