Patent ID: 8720267

Claim:
A partial stroke testing system coupled with fuel control valve, comprising: a combustion gas delivery line; a selectively operable gas shutoff valve disposed along the combustion gas delivery line; a selectively operable combination gas control and shutoff valve disposed along the combustion gas delivery line, the combination gas control and shutoff valve being disposed in series with the gas shutoff valve; a gas vent line extending from the gas delivery line and between the gas shutoff valve and the combination gas control and shutoff valve, the gas vent line having a distal end; a gas combustion port disposed at the distal end of the gas vent line; a gas vent valve disposed along the gas vent line for venting residual gas to the atmosphere via the gas combustion port; a control system for selectively automatically or manually substantially completely closing and reopening the gas shutoff valve; a control system for selectively automatically or manually partially closing and opening the gas shutoff valve; a control system for selectively automatically or manually substantially completely closing and reopening the combination gas control and shutoff valve; a combustion gas bypass line disposed in parallel about the combination gas control and shutoff valve; at least one selectively openable and closable bypass line shutoff valve disposed along the combustion gas bypass line; a gas shutoff valve actuator communicating pneumatically with the gas shutoff valve; a pneumatic pressure line communicating pneumatically with the gas shutoff valve actuator; a main solenoid valve disposed in the pneumatic pressure line, the main solenoid valve selectively controlling pneumatic pressure to the gas shutoff valve actuator; a pneumatic vent line communicating pneumatically with the pneumatic pressure line; a second solenoid valve disposed in the pneumatic vent line, the second solenoid valve selectively controlling pneumatic pressure in the pneumatic vent line; a combination gas control and shutoff valve actuator communicating with the combination gas control and shutoff valve; a current to pressure converter communicating pneumatically with the combination gas control and shutoff valve actuator; wherein the current to pressure converter includes regulating the fuel of a process control; and a third solenoid valve communicating pneumatically with the combination gas control and shutoff valve actuator; wherein closure of any one of the main solenoid valve, second solenoid valve, and third solenoid valve results in closure of one of the gas shutoff valve and combination gas control and shutoff valve.