Spiral Drum Link and Roller Chain Hoists
COH specializes in the design, fabrication and installation of Spiral Drum Link and Roller Chain Hoists. Spiral Drum Link and Roller Chain Hoists are typically used with Tainter or Radial, Pie shaped gates. Spiral Drum Link and Roller Chain Hoists can be used on spillways as control or emergency gates and are often mobile so that Spiral Drum Link and Roller Chain Hoists can be used for servicing many gates rather than just one.
Reliable and efficient Spiral Drum Link and Roller Chain Hoists
Often Spiral Drum Link and Roller Chain Hoists, whether fixed or mobile, are controlled remotely and used to regulate the desirable pond level. When Spiral Drum Link and Roller Chain Hoists are used on Arch Dams, the mobile hoists are supplied with articulating wheels to allow for travel along the curvature of the rail. The link chain allows for “dogging” of the gate to the deck at different elevations and then disengagement of the hoist so that it is available to raise and lower the remaining gates. When two chains are required to lift the gate, two drums are required and varying load conditions on each chain can occur. Dual Drum Link and Roller Chain Hoists should be designed to equalize the load on the chains and to prevent jamming and twisting of the gate.
COH is specialized in the design, engineering, manufacturing, installation and start-up of lifting equipment for hydroelectric projects such as Spiral Drum Link and Roller Chain Hoists.