b'SPRING RETURN HANDLE3 . 0 S T O R A G EDeadman dont have a shelf life however, store in a clean, dry area protecting the input and output bores from corrosion and damage by sealing each unit in a plastic bag. If the operators must be store outside, they must be covered in polyethylene with silica gel crystals to absorb moisture. Input shafts should be rotated every three months to mix lubricant.Australian Pipeline Valve - Installation, Operation and Maintenance Manual 9'