The rugged Powers Type DB (double seat bronze body) valve is primarily used for steam and water modulating applications that have capacity or pressure drop requirements beyond the capabilities of single seat valves. Additionally, the self-balancing characteristic enables double seat valves to use smaller actuators than single seat valves. The DB should not be used on applications where tight close-off is required (such as instantaneous water heaters). Bronze and stainless trim are available, with stainless recommended for applications over 50 PSI. The DB’s control and close off characteristics are particularly well-suited to applications requiring high capacity and tolerating Class II close off.