Originally, many hydraulic elevators were installed with single flat bottom in-ground jack units, many without any corrosion protection at all. Failures on these older designs may result inelectrolytic attack on the unprotected cylinder material, resulting in rupture of the cylinder and uncontrolled descent of the elevator.
Today's ASME National Elevator Safety Code requires single-bottom jacks (cylinders) to be replaced with double-bottom cylinders, which include a Safety Bulkhead, with a protective coating and a means for checking for ongoing compliance, or be equipped with code compliant safety devices, which can be far more costly than a cylinder replacement.
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Your local codes may require cylinder or jack replacement and/or a means of inspecting for ongoing compliances.
EECO is the LARGEST independent jack manufacturer in the United States and has been manufacturing hydraulic elevator equipment since 1946.
EECO offers FAST and cost-effective cylinder and jack unit replacements with manufacturing locations to serve your needs coast-to-coast.
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