ABS Check Valve Type 561 Solvent Cement Sockets d16-d110

  Datasheet (PDF)

The Georg Fischer ABS Check Valve Type 561 is an engineered non-return valve developed for dependable backflow prevention across demanding process networks. Designed with metric solvent cement sockets from d16 to d110, this valve provides reliable directional flow control in industrial cooling loops, chilled water circuits, water treatment facilities and utility installations. As an authorised Georg Fischer distributor, BigWeld supplies the complete Type 561 portfolio across Europe for installers requiring high mechanical resilience and clean fluid handling.

Technical specifications

The Type 561 check valve utilises a gravity-assisted mechanism with a double-guided return cone to achieve leak-tight shut-off without metal springs. This springless architecture prevents metallic corrosion and guarantees consistent flow stability under continuous service conditions.

The hydrodynamic profile inside the valve body significantly minimises localized turbulence and reduces pressure loss across the entire bore. Its dual-guidance design stabilises the cone against vibration, ensuring smooth travel and preventing mechanical jamming during fluctuating system flow rates. Leak tightness is fully established under a counter-pressure of only 2 metres of water column, making the valve exceptionally responsive in low-head piping circuits.

• Nominal pressure: Rated at PN10 (10 bar) at 20 degrees Celsius across the entire metric diameter range.
• Sealing profile: Premium EPDM seals delivering dependable tightness for aqueous media and treated process water.
• Sealing response: Reliable closure achieved with a minimum hydrostatic head of 2 metres water column.
• Component material: Impact-resistant acrylonitrile butadiene styrene (ABS) in RAL 7001 gravel grey.
• Dimensional envelope: Face-to-face dimensions identical to Georg Fischer Type 546 ball valves for uniform planning.

Applications

ABS check valves Type 561 are engineered for secondary cooling, chilled water distribution, water treatment plants, marine engineering and industrial water supply lines. Their robust thermoplastic build ensures chemical inertness and high impact performance even at low operating temperatures.

Because the fluid path is completely non-metallic, this check valve prevents contamination in sensitive process water networks, closed-loop glycol chillers and clean water infrastructure. The material offers exceptional resistance to atmospheric weathering, eliminating external corrosion risks common in plant rooms, coastal facilities and utility tunnels.

Installation and jointing

Jointing is performed through cold solvent welding using certified Tangit ABS solvent cement and dedicated cleaner. The valve features a true-union body that facilitates rapid radial installation and straightforward dismantling during system servicing.

For correct gravity seating, the springless Type 561 must be installed strictly in vertical piping runs with the medium flowing upward. The union end connectors allow installers to service or inspect internal valve components without disturbing surrounding pipework or pipe clips. Matching the overall installation length of Type 546 ball valves simplifies layout standardisation, bracket spacing and future valve retrofits throughout industrial installations.