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, have a rated flow of, 12 Gal / min (45 L /min), and can be used in a temperature range of -5 ? - 250 ?.