Flow control is integrated

Flow and process control equipment, from Keystone, have been combined to produce an integrated solution at the Cilfor water treatment works, near Porthmadog, in North Wales. Designed for Dwr Cymru by John Brown Engineering, the Cilfor installation is designed to process up to five megalitres of water per day, using pressure filters, carbon dioxide dosing […]

Flow and process control equipment, from Keystone, have been combined to produce an integrated solution at the Cilfor water treatment works, near Porthmadog, in North Wales.

Designed for Dwr Cymru by John Brown Engineering, the Cilfor installation is designed to process up to five megalitres of water per day, using pressure filters, carbon dioxide dosing for alkalinity control and chlorination treatment.

Water enters the plant’s large filtration vessels at high pressure. Pressures within the vessels of up to 15bar are handled by 29 Keystone K-Lok high performance quarter-turn butterfly valves, in sizes from 3in to 6in.

The K-Lok valves are operated by Keystone equipment – Biffi QTC quarter-turn single phase electric actuators – which are linked to the plant’s master station by Keystone’s ValvBus field bus system.

John Dutton, designer of the Cilfor system, said: `We have created an integrated control system based on Allen-Bradley’s PLCs, with an Allen-Bradley PC-based SCADA package.

The plant’s filtration system works on a batch process, in which three of the four filtration vessels are in operation at any time, while the remaining vessel is having its filters cleaned.

Keystone provided all the valve, actuator and control hardware at the installation, plus the ValvBus Masterstation, which also provides links to the PLCs used on the site.

At Cilfor, the Keystone K-Lok quarter-turn butterfly valves combine high strength, high flow capacity and good flow characteristics with minimum seat wear, enabling virtually maintenance-free operation.

{{Keystone Flow Control,Tel: 0141 810 3121; Fax: 8104724.359 on enquiry card}}