Conrader has been offering high-quality compressed air controls for more than 90 years. The company's line of products includes throttle controls, as well as check, safety relief, pilot, micro and unloader valves. Conrader unloader valves are designed to drain excess fluid to tank (with little or no pressure) to prevent pumps and system components from surge shock damage. These Conrader valves feature a maximum working pressure of 175 psi, brass body, stainless-steel ball and spring mechanism, maximum operating temperature of 500 degrees Fahrenheit, and max flow rate of 60 cfm. The company's soft seat safety valves protect pneumatic systems from damage due to overpressure. These SRV187 Series Conrader safety valves feature a silicon seal, brass body, stainless-steel spring, and set pressure range of 25 - 250 psig. They can efficiently operate at temperatures ranging from -65 to 400 degrees Fahrenheit, and are available in different connection types. Raptor Supplies.