The Role of Gate Valve in Piping Systems and Differences in Material Applications

The key difference between cast steel gate valves and cast iron gate valves lies in their material properties and pressure-bearing capacity. Thanks to their high strength and corrosion resistance, cast steel gate valves are the preferred choice for pipelines carrying high-pressure (>1.6 MPa), high-temperature, or corrosive media in industries such as petrochemicals and natural gas. Cast iron gate valves, on the other hand, are widely used in low-pressure (≤1.6 MPa) systems such as water supply and drainage and municipal engineering due to their simple structure and low cost. Valve selection must be based on operating conditions, including pressure, temperature, and medium characteristics, to ensure the safe and stable operation of the pipeline.