Fire Protection Resilient Seat Riser Check Valve 
Single flapper with spring return check valve by Arita Fire Solutions, ensures single directional flow allows horizontal and vertical (upwards only) installation in fire protection system.

Certification: UL/FM
Model: SW56 Series
Design Standard: AWWA C509/C515
Size: 2"-12"
Rating: 350 PSI
Body: Ductile Iron
Bonnet: Ductile Iron
Body/Bonnet Coating: Epoxy Resin Fusion Bonded
Stem: Stainless Steel 304
Wedge: EPDM Coated Ductile Iron
Packing PTFE
Gasket: EPDM Rubber
O-Ring: EPDM Rubber
Stem Nut: Bronze
Bolt, Nut, Plug: Stainless Steel 304
Connection: Flange End

Resources

Technical Drawing Arita SW56-Groove Check Valve