| Swing Check Valve | Commonly available from low-pressure service up to approximately 16–40 bar, with higher-rated designs available. | High flow capacity and generally low pressure drop when fully open; requires sufficient forward flow to hold the disc open. | Moderate closing speed. Can contribute to water hammer if reverse flow develops before the disc closes. | Usually installed in horizontal pipelines with the hinge above the flow path. Some designs permit vertical upward flow. | Pipelines, water treatment, fire protection, pump discharge, and general liquid service. | Simple construction, large flow area, low maintenance, and good performance in clean liquids. | Poor choice for pulsating flow, low-velocity flow, frequent cycling, or applications requiring very fast shutoff. |
| Lift Check Valve | Often selected for medium- to high-pressure systems, commonly in pressure classes from approximately 150 to 600 and above. | Lower flow capacity and higher pressure drop than a swing valve because the disc moves through a restricted flow passage. | Good resistance to reverse flow, but closing can produce a noticeable pressure surge if the valve is oversized or flow is unstable. | Commonly installed horizontally; some piston designs are suitable for vertical upward flow. | Steam, gas, high-pressure liquid lines, boiler systems, and process piping. | Reliable sealing, suitable for higher pressures, and good resistance to reverse flow when correctly sized. | Higher pressure loss, orientation restrictions, and sensitivity to dirty or abrasive media. |
| Wafer Dual-Plate Check Valve | Commonly supplied for approximately 10–40 bar service, with higher-pressure versions available depending on design and materials. | Good flow capacity with a compact body; pressure drop is typically moderate and lower than many lift-style designs. | Fast spring-assisted closing generally reduces reverse flow and water hammer compared with a conventional swing design. | Installed between flanges. Orientation depends on the specific design; many models allow horizontal or vertical upward flow. | Large-diameter water lines, HVAC, cooling systems, pump discharge, and space-limited installations. | Short face-to-face length, light weight, quick response, and reduced installation space. | Spring and plate components can be sensitive to debris, and maintenance access may be limited between flanges. |
| Spring-Loaded Inline Check Valve | Commonly used from low pressure to approximately 40–100 bar, subject to body material, size, and spring selection. | Compact flow path with moderate pressure drop. Cracking pressure is commonly about 0.03–0.30 bar, but must be confirmed for the selected model. | Very fast closing and generally good control of reverse flow and water hammer. | Can often be installed in any orientation, provided the flow-direction arrow is followed and the spring is correctly selected. | Instrumentation, compressors, pumps, chemical systems, gas lines, and compact piping assemblies. | Compact size, flexible orientation, quick response, and reliable shutoff at low reverse-flow conditions. | Higher pressure drop than a full-port swing valve and possible sensitivity to fouling or spring fatigue. |
| Diaphragm Check Valve | Typically selected for low- to medium-pressure service, often below approximately 10–16 bar depending on the diaphragm and body material. | Moderate flow capacity with pressure drop affected by diaphragm flexibility and the available flow area. | Fast, quiet closure with good isolation from the surrounding mechanism. | Orientation varies by design; the manufacturer's installation position should be followed. | Sanitary, corrosive, contaminated, or slurry-related services where minimizing metal contact is important. | Few moving parts, good contamination resistance, and no exposed sliding metal seat in the flow path. | Diaphragm wear, limited temperature and pressure range, and possible permeability concerns with certain gases or chemicals. |
| Ball Check Valve | Commonly used in low- to medium-pressure systems, often up to approximately 16–40 bar depending on construction. | Moderate to high pressure drop in compact versions; full-port designs provide better flow performance. | Generally quiet and reliable at moderate flow rates; closure speed depends on ball mass, spring action, and flow direction. | Often suitable for horizontal and vertical upward-flow installation. Vertical downward flow is normally unsuitable. | Wastewater, sewage, slurry, dosing systems, pumps, and fluids containing suspended solids. | Handles dirty fluids well, has a simple mechanism, and can provide self-cleaning movement in some designs. | The ball and seat may wear with abrasive media; incorrect sizing can cause chatter and accelerated damage. |
| Foot Valve with Strainer | Usually applied to low- to medium-pressure suction service; pressure capability is limited by the body and strainer construction. | Adds suction-side pressure loss because of the valve and strainer; select a large enough size to protect pump NPSH margin. | Prevents the suction line from draining and helps maintain pump prime; water hammer is usually not the primary design concern. | Installed at the bottom of a suction pipe and submerged in the supply tank, well, or reservoir. | Pump suction lines, wells, irrigation, water transfer, and systems that must retain prime. | Combines backflow prevention with debris screening and reduces pump-start priming problems. | Strainer blockage can starve the pump; unsuitable for applications where additional suction resistance cannot be tolerated. |