Double bottom jack elevators
Hydraulic Jack Units - Mowrey Elevator
Jack Types | Stanley Elevator
Hydraulic elevators installed before ( in. Canada), probably have 2 single-bottom cylinders buried beneath the ground and exposed to the possible.
Do you know, or do records indicate, if the hydraulic jack assembly was installed Owners with “single bottom” cylinder elevators must complete one of two Either 1) replace the cylinder with a double cylinder or a cylinder with a safety.
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Description:Hydraulic elevators are required to undergo an annual safety inspection and hydraulic system pressure test. In the ground the cylinder can be exposed to elements in the soil that cause corrosion and electrolysis. In Florida, any elevator with a serial number of or lower may have a single bottom cylinder. During the annual pressure test single bottom cylinders are susceptible to rupture. Many single-bottom cylinders are still in service today. This maximum pressure is referred to as the relief pressure.