DFT Inc. offers threaded in-line, insert wafer, and in-line restrictor gas check valves. Model SCV threaded in-line check valves come in sizes ranging from 0.5" to 3", cold working pressures ranging from 0 to 3600 PSIG, Cv ratings ranging from 7 to 180, and cracking pressures ranging from 0.20 to 0.62 PSIG. These valves feature NPT/socket weld end connections, a stainless steel construction, and they have steam, gas, or liquid applications.