Type 119 switching valve is used for on-off or throttling control of noncorrosive or mildly corrosive gases. It is designed to meet low-pressure gas application requirements in many varied industries. The 119EZ and 119EZS are used as fuel gas valves for oil and gas natural-draft burners. They are designed with a built-in speed controller that allows opening speed to be tuned to help ensure proper ignition of the main burner.