Type 02: Metal Seated Gate Valves

Before the introduction of resilient seated gate valves, metal seated gate valves were commonly used, relying on a conical wedge design for sealing. However, this metal-to-metal seal can wear over time, especially when sand or debris enters the valve, compromising the tightness. Resilient seated gate valves, with their flexible sealing surface, have largely replaced this design, offering a better solution for self-cleaning. Nevertheless, metal seated gate valves remain an option for certain applications in water supply and wastewater treatment, providing reliable performance under specific conditions.