Plastic Machinery Parts & Acessories


Monday - Friday 9AM - 5PM EST - 631.968.2600



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Air Blow Downs

Our Air blow valve is normally used to vent a pressurized tank. The valve can also be used to recirculate gas from a high pressure to low pressure system. The valve has an orifice on the exit so that the flow is controlled. The valve is fully pneumatic so that no spring is present. The valve is piloted to act and the system operates to return the valve. The normally closed blow down valve is commonly used to blow down the air/oil separator tank of a rotary screw compressor. The valve is attached to the tank so the tank pressure keeps the valve closed. To “blow down” the tank the valve is piloted open. The piston is designed so that the pilot pressure is less than the tank pressure. The Blow Down valve is a piloted normally open or normally closed valve.

Every air blow procedure is specifically engineered for the individual system being cleaned.  This approach provides numerous benefits for our clients, including time effective execution by efficiently sequencing the blows, thorough cleaning guaranteed by achieving an optimal cleaning force, and safe field execution through following the best industry practices.

Air blowing involves pressurizing the system or an additional volume to a predetermined and engineered pressure so that operational forces during the process will be exceeded. Once the predetermined pressure has been reached, the pressurized portion of the system is decompressed into a specialized collection and noise reducing receiver. For continuous air blowing, the system is subjected to a continuous stream of air at a predetermined and engineered flow rate until the client’s desired cleanliness specifications have been met.

Some of the Air Blow downs we have available in stock include Lower Blow Down, Upper Blow Down and many more.

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