Swagelok.com the source for tube fittings, valves, and other fluid system components | Swagelok A $1.8 billion, privately-held company, Swagelok Company designs, manufactures, and delivers an expanding range of the highest quality fluid system products and solutions. Our end-to-end quality system—from sourcing, raw materials and tooling to continuous improvement and predictive maintenance—helps ensure the consistent quality that customers expect.