13 VARIOUS TYPES OF HYDRAULIC AND PNEUMATIC VALVES, SUCH AS CHECK VALVES, RELIEF VALVES, SHUTTLE VALVES, REGULATING VALVES, UNLOADING VALVES, DRAIN VALVES, BLEED VALVES, INLINE FILTER CHECK VALVE COMBINATIONS, PRESSURE REGULATORS, FLOW NOZZLES, SPECIAL VALVE HOUSINGS, AND SPECIAL SYSTEM CONNECTORS SUCH AS ELBOWS, T'S, UNIONS, PLUGS, AND MANIFOLDS