Automation Parts

Scottish Water has replaced the ageing DC pump drive motors of three large sludge pumps at one of its wastewater facilities with matched W21 high-efficiency AC motors and CFW-09 drives from WEG. The DC motors were employed on Whitehead and Poole piston ram pumps that are used to transfer sludge from the Laighpark wastewater treatment site, which serves around 150,000 people in the Paisley area of Glasgow, to Shieldhall wastewater treatment plant. They had been installed for some years, providing the high torque at start-up necessary for the pumping operation, and the facility for variable speed control of the pumps via a simple potentiometer. Because the capacity for storing sludge at Laighpark is limited, transfers to Shieldhall are made daily. This places a premium on the reliability of the two front-line motors - the third is a duty stand-by - which are generally called upon to operate for six hours a day. This was not a problem until recently, when the age of the motors starting...

Diffusion Pump Offers Long-Term Performance BOC Edwards has released the HT20B diffusion pump, for light and heavy-duty industrial applications. The robust HT20B diffusion pump provides consistent, long-term performance and users will benefit from the highest throughput of any comparably sized pump. The new pump gives a high pumping speed of up to 8000 litres a second and is ideal for processes involving large quantities of gases, such as furnaces and coaters. The HT20B diffusion pump has a machined, cast aluminium interior for exceptional pumping stability and a stainless steel body to prevent corrosion and ensure process cleanliness. It is simple to operate and requires minimum maintenance. The heaters and oil can be changed easily. The design of the interior and boiler assembly enables the pump's performance and ultimate vacuum to be maintained between oil changes. It features a large sight glass to allow operators to easily check the oil level without disturbing the inte...