The Danfoss Pressure Control Heavy-duty PS -4-B 1-4 ATO is a high-quality industrial automation equipment designed for precise pressure control in heavy-duty applications. With the trusted Danfoss brand behind it, this unit guarantees a reliable performance and durability. This product is ideal for use in various industrial settings where precise control over pressure is essential for efficient operation.new old stock box is tatty see photo for condition and specifications. 2 available