Patent ID: 7392822
Filing Date: 2008-07-01
Classification: F16K,Y10T

Abstract:
1. A pilot assembly switchable between a throttle mode and a snap mode comprising: a pilot body having a throttle supply gas inlet, a snap supply gas inlet and a single output gas outlet for providing output gas to a process control component; a pilot plug in a pilot body interior, the pilot plug having a first sealing element engageable with a first seat, and a second sealing element engageable with a second seat; a variable force biasing means for applying a force to the pilot plug to urge the first sealing element in a direction toward the first seat; and a switch movable between first and second positions for selectively directing supply gas to throttle supply gas inlet in throttle mode and the snap supply gas inlet in snap mode, respectively, wherein supply gas passing through the selected of the throttle and snap supply gas inlets is communicated through the single output gas outlet to the process control component.