Leser LLC”sAPI 526 Series is a spring-loaded, pressure-relief valve, speciallydesigned and manufactured to meet API 526 and approved in accordancewith ASME Sec. VIII. The valve features a simplified design with aminimum of components and spare parts, which lowers maintenance costs.Sizes range from one inch to eight inches, orifice D through T. Optionsinclude balanced bellows and a soft seat for super tightness.