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※2Manufacturer’s Serial NumberAll of NACOL’s accumulators are marked with Manufacturer’s Serial Numbers. A Manufacturer’s Serial Number is seven numerical digitsfollowing two alphabetical letters.※1 For accumulators manufactured before September 1982, the number NameplateAn accumulator nameplate contains product information.The information may differ depending on the period of production.of numerical digits differs.Marking Sample Japanese Sample Manufacturer’s Serial NumberAll of NACOL’s SG valves are marked with the Manufacturer’s Serial Numbers.A Manufacturer’s Serial Number is seven numerical digits following two alphabetical letters.Marking sampleManufacturer’s Serial NumberAll of NACOL’s Spring Loaded Type Safety Valve are marked with the Manufacturer’s Serial Numbers.A Manufacturer’s Serial Number consists of seven numerical digits.Marking Sample English Sample115Item Number ※3Bladder Compound The material of the original bladder incorporated in the accumulator upon shipment is indicated.※3 Refer to explanation of an item number p. 27.When making inquiries about NACOL products or ordering replacement parts, please provide the serial number marked on the accumulator shell and the item number indicated on the nameplate.Manufacturer’s Serial Number and Nameplate※2 Marking position for accumulators manufactured before 1999. AccumulatorSG ValveSpring Loaded Type Safety Valve