CLA-VAL 581 Installation Operation & Maintenance

580 & 581 SERIES INSTALLATION / OPERATION / MAINTENANCE Note 1: flanged gasket must bridge this joint for pressure seal Installed with name plate here 6 2 3 4 5 1 OPERATION: Cla-Val Silent Check Valves operate automatically, to open... when pump flow starts and close silently ...when pump flow stops. INSTALLATION: Silent Che ...

to completely isolate check valve. A skilled pipe fitter should be used for this work. 2. Lay valve to rest on its downstream side and remove cap screws as shown in Fig. 3. Note that 2" and 2-1/2" valves threaded seats in lieu of cap screws. 3. Grip seat spokes by hand to pull ou ...