ABS Angle Seat Check Valve Type 303 PN10

  Datasheet (PDF)

The Georg Fischer ABS Angle Seat Check Valve Type 303 is an engineered non-return valve developed for dependable backflow prevention in industrial piping networks. Designed for process cooling, water treatment and chilled water systems, this PN10 rated valve covers metric pipeline sizes from d20 to d63 mm (DN15 to DN50). As an authorised Georg Fischer distributor, BigWeld supplies genuine Type 303 valves built for smooth hydrodynamic flow and low pressure loss across demanding utility installations.

Technical specifications

The Type 303 check valve utilises an inclined seat geometry that ensures high flow efficiency and minimal head loss during continuous operation. Its internal closing piston features a high specific gravity of approximately 2 kg/dm³, enabling rapid shutoff response without mechanical jamming or hydraulic shock.

The valve shuts off reliably even under low differential pressure, requiring only a 2-metre water column to achieve complete sealing across the seat.

• Nominal pressure rating: PN10 (10 bar at 20 degrees Celsius)
• Size range: DN15 to DN50 (metric spigot outer diameters d20 to d63 mm)
• Flow capacity: kv flow coefficient reaching up to 1130 l/min at DN50
• Minimum sealing pressure: watertight shutoff from a 2-metre water column
• Sealing material: high-grade EPDM gasket for dependable backflow protection

Materials and standards

The valve body is injection-moulded from impact-resistant acrylonitrile butadiene styrene (ABS) in standard RAL 7001 gravel grey. ABS maintains superior mechanical ductility and notched impact strength at low operating temperatures, making it particularly suitable for secondary cooling and chilled water loops where alternative rigid plastics risk brittle failure.

The completely non-metallic, corrosion-free construction prevents scale buildup, rust formation and internal encrustation over decades of fluid conveyance. Overall face-to-face dimensions strictly adhere to EN 558, guaranteeing straightforward integration, standard interchangeability and dimensional compliance within standardized European industrial installations.

Installation and jointing

The valve is engineered for installation on horizontal piping runs or on vertical riser lines with upward flow direction. The smooth metric spigot ends connect directly into standard solvent cement fittings and sockets using Tangit ABS adhesive following adequate surface cleaning, resulting in permanent, leak-proof solvent-welded joints capable of handling sustained mechanical vibrations and cyclic operating pressures.