DEMCA has been in business for over 30 years, and are both stockists and suppliers of electric multi-turn actuators (suitable for gate valves, knife gate valves, parallel slide valves, double block and bleed valves, penstocks and sluice gates) and quarter turn actuators (suitable for butterfly valves, ball valves and dampers) to the chemical, refining, pulp and paper, mining and power generation industries.