AVK Valves Shanghai has been chosen as the preferred supplier for the Haiyan wastewater treatment plant, providing valve solutions designed to withstand the harsh conditions at the facility.
Expanding plant capacity
The first phase of the project covered the expansion and modernisation of the treatment plant as well as the construction of a reclaimed water system and an associated water distribution pipeline. With these upgrades, the plant capacity will increase from 100,000 m3/day to 120,000 m3/day, serving an area of approximately 500 km2.The capacity of the reclaimed water system will be 25,000 m3/day delivered via a new DN1000 pipeline with a length of about 4.2 km. It is an addition to the current sea drainage pumping facility for conveying reclaimed water as production water to the local pulp and paper factory, Shanying Paper.
The second phase covered the implementation of a new combination of treatment processes. For the selection of valves, there were two primary challenges: the need for DN1200 direct-buried gate valves for the pipeline connecting biological treatment processes, and the need for valves to be able to withstand the long-term effects of ozone corrosion as advanced oxidation technology is used in the treatment combination.
Selecting the right valves
Most AVK products are as standard with internal and external epoxy coating in compliance with DIN 3476 part 1, EN 14901, and GSK guidelines. This provides excellent anti-corrosion performance and a long service life and fully meets the requirements for the gate valves to be directly buried in the soil. To meet requirements for anti-ozone corrosion of valves for the advanced treatment process section, the double eccentric butterfly valves delivered to this project were provided with a special anti-ozone coating to ensure a lasting solution and stable operation at the plant.
State-of-the-art manufacturing setup
Our modern manufacturing sites for large diameter valves are set to supply customers worldwide with reliable and resource-efficient solutions complying with the highest European quality standards. And our global presence helps us deliver a broad range of solutions for any application at competitive prices.
Product supplied to the project
4 resilient seated gate valves, series 06, DN1200
12 double eccentric butterfly valves, series 756, DN1000-DN1400
AVK double eccentric butterfly valves
AVK manufactures double eccentric butterfly valves in DN150-2800 designed with durability in focus. The tilted and firmly secured disc, the optimised seal design and the corrosion protected shaft end zones all exceed market standards.
Product info and animation
