Resilient Seated Gate Valves TYCO Resilient Seated Gate Valves with vertical and diagonal indicators are used in fire protection systems for on/off operation. Ending connection icons including Flange by Flange, Flange by Groove and Groove by Groove are available. Ductile iron bodies weigh approximately 50% less than conventional cast iron valves, allowing easier on-site handling and reduced transportation costs. Fully encapsulated EPDM ductile iron ensures tight sealing. Valve components are either corrosion resistant or protected with a bonding epoxy resin coating for long, reliable service life and enhanced UV protection in exposed settings.