For 40 years, the Dutch company Wouter Witzel has been a leading international manufacturer and supplier of high quality industrial butterfly valves and actuators. The products are used in pipelines as shut-off valves, control valves, and non-return valves. A full range of manual control devices, actuators, and accessories is available for specific conditions. The Wouter Witzel products meet the most stringent international quality requirements and are highly durable.