Samson Controls has helped to achieve energy savings at Excel, a London, UK exhibition centre. The centre has 90,000m2 of events, conference and meeting space, as well as cafes and restaurants. A typical exhibition hall would cover about 6400m2 and as a result of the flexible layout of the halls, adjacent halls can be easily joined together, with single halls of up to 3200m2 possible. To help achieve the objectives, variable speed pumps for water circulation in the extensive heating and ventilation systems were utilised. To ensure that the water distribution worked as the designers intended it was important that Differential Pressure Regulators were installed as the primary balancing device. Samson Controls were approached and provided over 225 valves ranging in size from ½” series 45 valves, up to size 400mm series 2333 valves. The 400mm valves are some of the largest globe valves manufactured and were installed to handle flow rates as high as 375ltr/sec. The Samson valves enabled speedy commissioning of the water distribution network because each sub-circuit could be set independently of each other circuit, without the need to go back and adjust previously set circuits.