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An Overview of Key Check Valve Types for Industrial Applications - sinoseo - 13-10-2023 Axial Flow Check Valves Axial flow check valves direct fluid along the axis of the valve body to produce straight-through, non-turbulent flow. Benefits include: Compact, lightweight, and streamlined design Low pressure loss due to smooth, efficient flow path Can handle high flow velocities and high pressure Straight-through closure minimizes slam and water hammer effect Minimal cavitation and turbulence compared to swing checks Axial checks are ideal for applications requiring minimal flow restriction. China Lift Check Valves Originating in China, lift checks contain a ball or disc attached to a hinge. When open, flow lifts the disc to allow passage through the valve. Benefits: Can be installed horizontally or vertically-effective for low pressure systems with vertical flow Handle water, sewage, oil, and some chemicals Simple construction with only one moving part Low cost compared to other check types Lift checks suit low pressure drainage and pumping applications. Dual Disc Check Valves Dual disc models have two hinged discs that seal against seats in opposite directions. Key features: Tight shutoff with two sealing surfaces Low leakage and slam potential Handles high pressure, high temperature, and abrasive fluids Suitable for large pipe diameters Discs can seal even on very low back pressure Provides redundancy if one disc fails Dual disc checks are ideal for severe service conditions. Evaluating Check Options Consider fluid properties, pressure, flow, line sizes, installation factors, and operating conditions when selecting the optimal check valve. Consult manufacturers to pick the right model for each application need. |