Georg Fischer Piping Systems has redesigned its Type 561 and 562 check valves which complement the company’s line of plastic valves. The standard cone check valve type 561 seals with medium pressure while the type 562 is equipped with a spring, closes autonomously and can be installed in any position. The inner workings of the valve were developed and designed by GFPS Research & Development to comply with clear market specifications including operating in any installation position whilst offering greater safety.
The new valves rely on a specially developed double-guided cone, the geometry of which is designed for optimal flow and minimal pressure loss. The sealing lip of the valve is flexible in the sealing zone, allowing the elastomer to ideally encompass the cone. The new 562 check valve closes absolutely leak-tight with the built-in spring – even without a water column. In this way, it can be installed in any position, whether horizontally or vertically. A selection of various materials are available for the spring, either stainless steel (DIN standard material no. 1.4310), plastic (ECTFE) encased Nimonic 90 ® (2.4632) or high quality Nimonic 90 ® (2.4632). The Nimonic spring is recommended for applications with aggressive chemicals.
The dimension range has been extended in all materials to include DN65, DN80 and DN100 and the wide assortment of connecting parts in all the conventional standards and versions means that the valves can be built into plastic piping systems worldwide, whether ISO, ANSI or JIS standard.
The new valves rely on a specially developed double-guided cone, the geometry of which is designed for optimal flow and minimal pressure loss. The sealing lip of the valve is flexible in the sealing zone, allowing the elastomer to ideally encompass the cone. The new 562 check valve closes absolutely leak-tight with the built-in spring – even without a water column. In this way, it can be installed in any position, whether horizontally or vertically. A selection of various materials are available for the spring, either stainless steel (DIN standard material no. 1.4310), plastic (ECTFE) encased Nimonic 90 ® (2.4632) or high quality Nimonic 90 ® (2.4632). The Nimonic spring is recommended for applications with aggressive chemicals.
The dimension range has been extended in all materials to include DN65, DN80 and DN100 and the wide assortment of connecting parts in all the conventional standards and versions means that the valves can be built into plastic piping systems worldwide, whether ISO, ANSI or JIS standard.
