Bronze. NAMUR interface on the piston actuator. 3/2 and 5/2-way valves can be mounted directly. Medium temp. -10 °C to +180 °C. Ambient temp. -20 °C to +70 °C. Differential pressure: 0 to 16 bar. Permissible static pressure: Max. 16 bar Pilot fluid temperature: Max. 60 °C