Locking electrical receptacle

摘要

An apparatus includes a control valve (130) for regulating fuel flow. The apparatus includes a burner (190) and a valve assembly (120). The valve assembly (120) includes a housing, which defines a first fuel input for receiving a first fuel from a fust fuel source and a second fuel input for receiving a second fuel from a second fuel source. The housing defines a first fuel output for directing fuel toward the control valve, and a third fuel input for receiving a portion of either the first fuel or the second fuel from the control valve. The housing defines a first egress flow path and a second egress flow path, each for directing fuel to the burner. The apparatus includes a valve body configured to selectively permit fluid communication between the first and second inputs and the output and between the third input and the egress flow paths.