Metaval Single Flap Check Valves are compact, lightweight, and robustly constructed valves ideal for backflow prevention in low-pressure systems. Using a single disc hinged at the top, the flap opens with forward flow and swings shut to block reverse flow. These valves are simple in design, easy to install, and require minimal maintenance.
1/2” to 48”
Class 150 to 600
PN 10 to PN 40
1/2” to 48”
EN 558, ISO 5752
PN 10 to PN 40
Class 150 to 600
Up to 150°C (depending on seat material)
Wafer, Lugged
Body: Cast Iron, Ductile Iron, WCB, CF8, CF8M
Disc: Ductile Iron (epoxy coated), Stainless Steel (304, 316), Bronze
Seat: EPDM, NBR, PTFE, Viton
Hinge Pin: SS304 / SS316
Gasket: EPDM / NBR / PTFE
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