CDI CONTROL DEVICES ST2512-1A175 Brass Air Safety Valve with Soft Seat Valve Type ; Max. Temp. (f), 250°F ; O-ring, Silicone ; Preset Setting (psi), 175 psi ; Rated... Hydraulcs, Pneumatcs & Plumbng 100 ps Set Pressure Control Devces... Cdi Relief Conrader Brass ASME Approved Safety Valve, 175 Psi Set Pressure, 1/4 Cdi Sb75 ASME safety rated with UV and NB marks This safety valve is American Society of Mechanical Engineers (ASME) safety rated and displays the UV mark for pressure vessel safety valves. It also displays the NB mark for certification in accordance with NB-501, National Board Certification of Pressure Relief Devices. This Control Devices ST2512-1A175 ASME safety valve has a brass body, a 175 psi relief pressure, a 1/8 inch male NPT threaded inlet connection, and a stainless steel pull ring for manual pressure relief. 250 F maximum temperature for use in high temperature applications Three Pack 1/4 Male NPT 150 ps Set Pressure Control Devces ST Seres 1/8 NPT threaded inlet connection with Vibra-Seal threadlock Brass construction and music wire spring for corrosion resistance