Diaphragm pressure relief valve MOD. 121 series

flange

These valves are designed to protect the reservoirs against overpressures and when the vapours are to be collected in an exhaust line. As the reservoir pressure exceeds the valve setting, the pallet arises allowing the vapour discharging. Tightness by elastomeric O-Rings (NBR, FPM/FKM, FFKM) to minimize the leakages. These valves are used when the setting values exceed 800 mbar; the pallet is spring loaded. MAIN FEATURES REPLACEABLE SEAT ANTIFREEZING PALLET The drip around the pallet avoids condensate collecting around the seat. PALLET GUIDES LOCATED ABOVE THE SEAT This arrangement assures a no-jamming guide of the pallet not affected by contaminant fluids as a close coupling between pallet and guides is not necessary. SETTING Any setting available, charging the pallet's dead weight load, between + 20 mbar and + 400 mbar (On request higher sets) MATERIALS BODY Cast Aluminium WCB, CF8 (304),CF8M (316). SEATS AND PALLETS AISI 304, AISI 316 BIRD SCREEN AND GUIDES 18/8 Stainless Steel DIAPHRAGMS FEP, P.T.F.E., NBR, FPM/FKM, etc.