A lift check valve is a type of non - return valve designed to allow fluid flow in one direction while automatically preventing backflow. Its core mechanism features a disc (or "plunger") that lifts vertically off its seat when forward flow pressure overcomes the disc's weight and spring force (if present). When flow stops or reverses, the disc drops back onto the seat to seal tightly, blocking reverse flow. This design is known for its simplicity, reliability, and suitability for clean fluids in pipelines, pumps, and industrial systems.
Performance Considerations
Pressure Rating: Must match pipeline pressure (e.g., PN10,PN16).
Flow Coefficient (Cv): Determines pressure drop across the valve (tested per standards like ASME B16.104).
Noise and Vibration: Mitigated via optimized disc geometry in high - velocity systems.
Advantages
Simple structure for easy maintenance.
Low pressure drop in open position.
Reliable sealing for bidirectional flow prevention (in spring - assisted designs).
Limitations
Unsuitable for dirty or particulate - laden fluids (risk of disc jamming).
Higher inertia in large sizes may cause water hammer during rapid closure.
Applications
Water/wastewater treatment plants
HVAC systems
Petrochemical and oil & gas pipelines
Power generation (steam and condensate lines)
Pump discharge lines (to prevent pump damage from backflow).
Audited Supplier 
){kind=link}