In demanding marine environments, pressure and vacuum relief valves are essential for safeguarding vessels from excessive pressures or vacuums that can damage critical systems. The 82.5mm Flanged Hyper Maxi Pressure/Vacuum Relief Valve, designated as REL178, is specifically designed to meet these challenges. This robust valve features a flange drilled with four slots at a minimum PCD of 145.0mm and a maximum PCD of 152.4mm, making it compatible with various flange standards including DIN65 PN10, DIN80 PN6, and ASA 150. The REL178 is capable of handling set pressures ranging from 2 to 75 PSI (0.14 to 5.17 Bar) and vacuum settings from 0.5"Hg to 26"Hg (0.02 to 0.88 Bar). Constructed with 316 stainless steel contact parts and fitted with Fortyt seals, it ensures reliable performance in corrosive marine conditions. Options for this valve include a pressure-only version, a high-pressure extended body variant, and alternative seal materials to suit different temperature ranges. The REL178 has been approved by Lloyds Register of Shipping for set pressures of 25 PSI (1.7 Bar) and above. Weighing approximately 5.9 Kg, it is designed to withstand a maximum allowable working pressure (MAWP) of 5.2 Bar (75 PSIG) and can be tested at 10.1 Bar (147 PSIG). For detailed valve flow data, contact Fort Vale's sales team for the specific datasheet. Regular visual inspections and servicing every six months are recommended to maintain optimal performance.