250-4F Series 1/4 pipe 4-Way Foot Valves feature the classic Humphrey diaphragm poppet principle. The unbalanced, air-spring return design assures bubble-tight sealing at rest and actuated. Rugged 4-way, 5-port valves are furnished normally closed / normally open standard. Excellent choice to operate up to 4 inch bore, double acting pneumatic cylinders. Valve furnished with 12 gage steel guard to protect foot and valve. Remove rubber feet and use mounting holes for locating.