Dwyer SSV-B9N2 Brass Solenoid Valves are designed for 2-way guided flow control in a wide range of compatible gases and liquids. These valves have a temperature range of 32 to 176°F for the process and 32 to 149°F for the ambient temperature. They can be powered by standard 110 VAC or optional 220 VAC or 24 VDC. The valves have a NEMA 13 (IP54) enclosure rating and come with DIN electrical connections. The wetted materials include a brass body, 304 SS spring, and NBR seal. The pressure limit is 174 psi and the process connection is female NPT. These valves can be mounted in any orientation, although best results are achieved when the solenoid is positioned vertically above the valve. The maximum operating pressure varies depending on the line size, ranging from 0 psi to 87 psi for 1/8 to 1/4" sizes, and 7.3 psi to 116 psi for 3/8 to 2" sizes. The valves operate on a normally open (NO) type of operation.