Since 1774 Darwins Castings has been manufacturing high integrity sand castings of outstanding quality. Our foundry is based in Sheffield in the UK, a city with a worldwide reputation in the steel industry. We are a leading European manufacturer of bespoke components for pump, valve and process equipment in the oil and gas, power generation, water, petro-chemical and chemical industries. Using high-end processing facilities, we offer a complete service for all stages of production, from initial concepts, drawings and design through to manufacturing, testing and certification.