Hader-Seitz Rotary Valves fulfill the need for changing a flow path of liquid within a circuit. Our spool-in-housing rotary swivel valves have multiple ports and multiple passages. Pressures range from 1, 000 to 5, 000 psi with a 2-to-1 safety factor. Hader-Seitz Rotary valves are designed to the most rigorous specifications to meet your needs and also provide a long useable life. Rotary Valves allow for the change in path of liquid as it flows through the unit. The valve itself has multiple ports where liquid either enters or exits. A cylindrical block located in the center of the device has pathways milled into it. As the central block is rotated, those pathways realign with different ports, thus changing the exit path of the liquid.