Disco non-return valves

GESTRA Disco RK non-return valves are compact axial-model valves where the closing spring lies symmetrically in the centre of the valve. GESTRA applies a so-called lapping technique where the sealing surface of each closing disc is finished separately by grinding that makes the valve so tight that it can also be used as a vacuum relief valve in the piping.

The non-return valves of the Disco model suit in the best way for small pipes, because their flow resistance in relation to other flanged non-return valves will rise as the pipe size increases.

Different materials for different process medias

In addition to the lapping of the seal surface, the material selection is also wide. There are different materials for the body, the flap and the spring. Therefore, it is possible to design tailored solutions, for example, so that the spring of the non-return valve is made of Hastelloy, and the other parts are made of acid-proof steel. The standard opening pressure is 5 mbar, and other spring forces can be selected from a wide selection.

Soft seals EPDM, NBR or PTFE are also available.

MB is a threaded brass non-return valve for water systems. All RK models are designed to be installed between flanges. Depending on the model, the body materials are special brass as well as stainless or acid-proof steel of different grades. 

The product range also includes PN 160 high pressure valves.


  • DN 15-200
  • PN 10-160, ASME 150-900#
  • laippojen vu00e4liin, kiertein
  • GG-25, GS-C 25 N, AISI 316, erikoismessinki, hastelloy

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