Flush face couplers are widely used in the public utility market where hydraulic oil spillage can be a serious safety hazard. These couplers are used for the quick change of hydraulic tools in a variety of industries. They have a maximum working pressure of 5,000 PSI, has a rated flow of 5.9 Gal / min (22 liters/min), and can be used in a temperature range of -5F - 250F.