Abstract: A float actuated drain system for reservoirs containing pressurized air and/or liquids such as drain valves for traps used in the accumulation of condensate materials from pneumatic systems opens and closes a drain valve depending upon the water level in the reservoir. The drain valve uses internal pressure released from within the reservoir through a normally closed orifice and passing through a tube to operate a drain valve actuator. A lever pivotally mounted inside the reservoir has a float on one end and a stopper on the opposite end which closes the orifice when the liquid level in the reservoir is low and which moves away from the orifice when the fluid reaches a high level in the reservoir to release pressure through the orifice to operate the valve actuator and open the drain valve. After the liquid drains from the reservoir, the float moves to a lower position and the stopper closes the orifice.

Abstract: An automatic float-activated drain valve for a liquid reservoir used in the accumulation of condensable materials and other contaminants from pneumatic systems and the like. The float is connected by a flexible tether to a lever arm which opens a pilot valve when the reservoir fills with water and the float moves to the top of the reservoir. The pilot valve permits air pressure to flow to an actuator which opens the drain valve. The pilot valve is in communication with a check valve which releases air pressure into the interior of the reservoir to rapidly expel water through the drain valve when the pilot valve is opened.

Abstract: An automatic float-activated drain valve for a liquid reservoir used in the accumulation of condensable materials and other contaminants from pneumatic systems and the like. The float is connected by a flexible tether to a lever arm which opens a pilot valve when the reservoir fills with water and the float moves to the top of the reservoir. The pilot valve permits air pressure to flow to an actuator which opens the drain valve.