Made from stainless steel 18/8 (AISI – 304/DIN 1.4301) and 18/8/2 (AISI 316/DIN 1.4401), With a black polythene cover, polythene buoys available in stainless steel AISI – 304/AISI – 316 on demand. Swing type valve with silicone shutter, available in Viton, EPDM, Buna, PTFE, etc., on demand. The valve closes progressively. Valve system patented and guarantees a perfect seal withminimum force from the float. Connection with Gas thread cylindrical DIN – ISO 228/1985. Note: For turbulent waters, shaken water deposits found in refrigeration towers, etc. reinforced levers should be used.Nominal pressure PN – 10, maximum variable pressure 10 bar.