Valves play key role in cleaning and maintaining aqueduct pipes
Oct 10, 2006
When the Jordan Valley Water Conservancy District in Utah decided to clean its water aqueducts, a new series of large-scale valves were needed to allow the cleaning device to pass through as well as reliably hold back the water during manual inspections. Assisting the water district in this task were 72” knife-gate valves from ITT Engineered Valves Group.
The Uinta Mountains are a particularly valuable natural resource, lying to the east of Salt Lake City. The Central Utah Project was constructed to convey water from these mountains to a growing population along the Wasatch front. The aqueduct is a vital component of this project, helping supply high-quality water to more than 950,000 people who live and work in Salt Lake County.
As the demand for more water continues to increase in the Salt Lake metropolitan area, keeping the aqueducts clean and capable of delivering maximum flows is a prudent investment - which brings us back to the reason for the inspection tour of the aqueduct.
The inspection tour is precursor to an upcoming cleaning of the entire inside of the 17-mile long aqueduct. As the aqueduct delivers raw water from the mountains, grit, sediment and even moss will coat the inside of the pipe, reducing its flow characteristics.
When the aqueduct was originally constructed, 72” butterfly valves were installed throughout its length. Because the pigging device takes up the entire area of the pipe, the pig would not be able to pass by the butterfly valves. In the summer of 2003, all three butterfly valves were replaced by Fabri-Valve bonneted knife-gate valves from ITT EVG. The gate of the valves fully retracts and provides an unrestricted full flow port, which allows the pig to pass through. But, what’s good for the pig also seems to be pretty good for the people who work with the Jordan Valley Water Conservancy District - especially those who take part in those inspection tours inside the pipe.
- 304 stainless steel wetted components and carbon steel exteriors
- bonnets to protect the gate and a dirt shields to protect the actuation;
- dual, replaceable neoprene seats;
- special seat protectors to shield the soft neoprene seats from the abrasive bristles of the pig;
- electric actuators.
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