Forged Brass body.Teflon seats and diaphragm.Capsulatedcoils DIN43650connection IP65protection. Minimumpressuredifferential:0.07BAR(1PSI) except size 1/4" :0 BAR. Maximum pressure differential: 21 BAR (300 PSI) for direct current: 10 BAR. Maximumworking pressure: 28BAR(406 PSI). Temperature range: -40°C to 110°C (-40°F to 230°F). Flare SAE connection or brazing terminals. The copper tube extensions do not require the valve to be disassembled at the time of brazing.