Pivoting Disc Check Valve - 586 | Cla-Val

Cla-Val 586 Pivoting Disc Check Valve

The Cla-Val Series 586 is a flanged, pivoting disc check valve designed for pump discharge lines where reverse flow and disc closure dynamics influence system hydraulics. Available with ANSI flanges in pressure classes 125, 150, 250, and 300 lbs.

Construction

• Two-piece body: ductile iron ASTM A536 65-45-12
• Seat and disc rings: bronze ASTM B16 C36000
• Pivot pins: stainless steel ASTM A582 T303
• Disc: bronze alloy C90700 for 3"–10", ductile iron for 12"–14"
• Seat sealing: metal-to-metal
• Internal/external coating: two-part epoxy, FDA-approved for potable water contact

Operation

The disc rotates off the seat under normal flow and returns when upstream flow ceases. Body geometry increases flow area at the seat zone, reducing head loss compared to conventional hinged disc check valves.

Closure Control Variants

586CB – Bottom Mounted Buffer
Free opening, with controlled final closure over the last ~10% of stroke. Used where rapid flow reversal and risk of slam or hydraulic shock are present.

586CT – Top Mounted Oil Dashpot
Hydraulic oil mechanism provides controlled opening and closing. Selected for applications requiring slower flow initiation and field-adjustable closure timing.

Typical Applications

• Vertical turbine pump discharge
• Booster pump stations in high-rise buildings
• House pump systems
• Discharge lines requiring water hammer mitigation

Installation and Maintenance

Install horizontally or vertically with upward flow, aligning the body arrow with flow direction. Prior to commissioning, piping must be cleaned of debris and flange alignment checked, as pipe stresses can cause seat leakage.