The Non-Slam Disc Check Valve (also known as a Silent Check Valve or Nozzle Check Valve) is the ultimate solution for preventing water hammer and protecting sensitive piping infrastructure. Unlike traditional swing checks that rely on gravity and flow reversal to close, this valve features a spring-assisted disc that closes the instant forward flow velocity decreases to zero—before the flow can reverse.
Engineered for critical applications, the non-slam design ensures a quiet, hammer-free operation, significantly extending the lifespan of pumps, fittings, and instruments.
Key Features & Benefits:-
- Eliminates Water Hammer: The short-stroke, spring-loaded disc responds instantly to flow changes, preventing the destructive pressure surges caused by sudden valve slamming.
- Silent Operation: Specifically designed for "silent" closure, making it ideal for high-rise buildings, hospitals, and residential water systems where noise reduction is a priority.
- Compact Wafer Design: Its slim, lightweight profile fits easily between standard flanges, saving space and reducing installation costs compared to bulky globe-style check valves.
- Superior Sealing: Available with precision-ground metal-to-metal seats for high temperatures or resilient (EPDM/Viton) seats for bubble-tight shut-off in gas and liquid services.
- Low Maintenance: With only one moving part and a protected spring mechanism, these valves offer exceptional reliability and a long service life with minimal intervention.
Technical Specifications:-
| Feature |
Specifications |
| Size Range |
1/2" to 24" (DN15 – DN600) |
| Pressure Ratings |
PN16, PN25, PN40 |
| Body Materials |
WCB (Cast Steel), CF8M (316 SS), Ductile Iron, Bronze |
| Disc & Spring |
Stainless Steel (304/316) for corrosion resistance |
| End Connections |
Wafer, Lug, or Flanged |
| Temperature Range |
-29°C to 425°C (Depending on Material) |
Target Industrial Applications:-
The Non-Slam Disc Check Valve is the preferred choice for high-velocity and high-cycle systems:
- Pumping Stations: Protects centrifugal pumps from backflow-induced damage and vibration.
- HVAC & R: Essential for chilled water, condenser water, and boiler feed systems in commercial buildings.
- Water Treatment: Used in municipal supply lines and desalination plants to ensure smooth, surge-free flow.
- Power & Steam: Handles high-pressure steam and condensate return lines where thermal shock is a concern.
- Chemical & Process Piping: Reliable backflow prevention for aggressive media and volatile gases.
