GENTEC R77 series regulators available in chrome plated brass and stainless steel are hand adjustable, spring loaded back pressure regulators for applications of any non-corrosive or corrosive gases. The specially designed stainless steel diaphragm provides excellent accuracy and sensitivity. Performing as a sensitive relief device, the GENTEC R77 series Back Pressure Regulator protects instruments or systems by maintaining precise back pressure. Also, the adjustable pressure range of the R77 series Back Pressure Regulator allows the convenience of frequent changes of the relief setting without exchanging traditional relief valves.