With independent bases mounted at each of the lift stations, the cranes can be moved between each of the gates as needed.Click here to enlarge imageWhen the Washington-East Washington Joint Authority (WEWJA) in Washington, PA, needed a crane to lift the gates on its newly constructed aeration tanks, the Authority chose to purchase one Thern 5122 Series Portable Davit Crane, because the cranes can be moved from job to job.
The WEWJA processes 8.5 million gallons of wastewater every day using fixed film biotowers, anaerobic processes and aeration tanks. A newly constructed expansion to the plant created four aeration tanks, each needing a crane to lift the gates.
With independent bases mounted at each of the lift stations, Matthew Marasco, the Authority's water quality supervisor, and his team were able to move one Thern crane between each of the gates as needed.
Although WEWJA plans to purchase additional cranes in the future, the portability of the 5122 series allowed the authority to save money early-on in the expansion of the plant, while retaining the flexibility to add more cranes to the system gradually.
In addition to their portability, Thern's 5122 Series Portable Davit Cranes also feature a quick disconnect anchor for attaching or removing the wire rope from the winch drum. This system allows operators to leave the hook attached to the load, disconnect the wire rope from the crane, and move the crane to the next lift station.
Marasco plans to purchase an additional crane for WEWJA to mount on a rail system and use to lift a submerged pump.
The Thern 5122 cranes rotate 360 degrees on a pin and sleeve bearing in the base. The company uses corrosion resistant finishes with an electrostatic powder coating on their cranes. A galvanized finish and stainless steel models are also available.
