Description Bold as brass, United Brass Works manufactures steam valves and components, primarily for steam equipment. The company's main customers are in the dry cleaning and laundry equipment, electrical apparatus, fire protection, and steam boiler markets. United Brass Works' Keystone Foundry manufactures pressure-tight brass sand castings for OEMs across the US, and it offers pattern and tool services for repair, maintenance, and modifications. United Brass Works also provides custom-designed products, as well as in-house engineering, design, and prototyping services.