Abstract: An actuator stem assembly configured to provide bi-directional movement of a stem in relation to a plug to isolate external forces exerted upon the stem from misaligning the plug. The actuator stem assembly includes a stem, an intermediate slider, and a plug. The stem is configured to slidingly engage the intermediate slider in a manner sufficient to allow translation in a first direction. The intermediate slider is configured to slidingly engage the plug to allow translation of the intermediate slider in a second direction. The first and the second directions are perpendicular to one another, thereby allowing for bi-directional movement of the stem.

Abstract: A bypass valve assembly configured to provide a secondary fluid passage around a valve. The secondary fluid passage includes a regulator device that selectively restricts the fluid flow through the secondary passage. During pressure spikes, the regulator device is configured to open so as to relieve pressure in the system and prevent failure of the valve.