A check valve does one thing automatically: it lets flow pass in one direction and closes when flow reverses. On a pump discharge that single function protects the impeller from backspin, keeps the column of water from draining back, and limits the surge that follows a sudden stop.
The Niagara range
The range includes single clapets anti-retour et double check valve assemblies for applications requiring an additional layer of backflow protection.
Applications
Pump discharge lines, booster set manifolds, fire protection systems, potable water backflow prevention, and irrigation headers.
Selecting a check valve
Match size and pressure rating to the line, and consider closing characteristics — a slow-closing valve on a long discharge main will reduce water hammer.
