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 صمامات عدم الرجوع و double check valve assemblies for applications requiring an additional layer of backflow protection.
مجالات الاستخدام:
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.
