Valve for Dosing System

Quarry Conveying Dilute Polymer Solution on Dosing System

A water treatment specialist working with aggregates at a quarry are using a diluting system to filter out solids on a polymer mixing unit.

The quarry is one of the UK’s leading waste and resource management companies. Every day, they collect and process recycling and waste from households and businesses. It is then recycled or converted into energy to power and heat our homes.

To operate the dosing system, a valve is needed. The valve installed on this old system has been in place for over 15 years, and is still operational. The quarry got in touch with us at AKO UK, to acquire some replacement valves in case of a failure so that they had backup.

How the Dosing System Works

The Pinch Valves are installed in a system which automatically dilutes and doses a polymer solution into quarry slurry in order to remove the solids. The valve opens and closes on command from the control system when polymer dosing is required. Solenoids, pressure gauges and regulators are all utilised in the same system.

Reliable Valve to Fit and Forget

With the temperature of the dilute polymer solution passing through the valve being ambient, the pressure of it flowing through being gravity fed, and the valve being opened/closed between 5-10 times per day, it is no wonder the Pinch Valve has lasted so long. The polymer solution is not abrasive or aggressive, so the lifetime of the sleeve continues to be exceptional, with such little use.

Pinch Valve used within this application: VF040.03X.31.30LA

VF model, air operated, aluminium body, aluminium flanges PN10/16 with mild steel bushings, natural rubber sleeve.

The Pinch Valves recently purchased by the quarry are direct replacements for those already installed on the system as no spares were kept on site.

The quarry now have three new complete valves ready and waiting on the shelf as replacements when needed. It was decided that there is no need to change the current valve since it is still operating with no problems. It is likely that sleeve repairs will be carried out as and when needed.

Since the old valves have lasted 15+ years, the quarry are confident and have peace of mind that the new replacements will give the same performance.