Control Devices ST Series Brass ASME Safety Valve 1/4" NPT 120 PSI 47 SCFM Relief pressure preset to 120 psi with flow rate of 47 SCFM 1/4" male NPT threaded inlet connection Brass construction and stainless steel spring for corrosion resistance 250 degrees F maximum temperature for use in high temperature applications ASME safety rated with UV and NB marks