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Wafer check valve made of stainless steel - Wafer check valves Stop Silent AS54

09.04.2026
Wafer check valve made of stainless steel - Wafer check valves Stop Silent AS54
Wafer check valves are one of the most cost-effective solutions for modern piping systems. The Stop Silent AS54 model is the world's most space-saving wafer valve, it is mounted directly between two pipe flanges on the inside and has the largest functional opening on the market.

Main advantages at a glance:
  • Compact and lightweight: The cone disappears almost completely into the pipe, leaving only the flange thickness plus gaskets or the nameplate with earthing opening visible. The Stop Silent AS54 Wafer valve is the most space-saving valve in terms of flange thickness worldwide. -
  • Functional opening: Largest functional opening among wafer valves on the market
  • Versatile installation position: They can be installed in both horizontal and vertical pipes (with upward flow).
  • Reduction of water hammer/pressure surges (water hammer): The conical diaphragm reacts immediately to changes in pressure. It closes gently and opens in a controlled manner - effectively minimizing pressure surges in the pipe.
  • Cost efficiency: Due to the lower amount of material used, our Stop Silent AS54 (wafer) are cheaper than conventional check valves with a flanged body.
  • Reliable sealing and long service life: our conical diaphragm seals reliably and has a service life of up to 60 years.
  • Easy to maintain: they can be easily removed and maintained between the flanges.
  • Wide range of applications: Suitable for water, oily, pasty, sticky, sandy or gaseous media in drinking water, chemical and petrochemical industries, shipbuilding and HVAC systems.
  • Various sizes: 8 sizes available from DN40 to DN200


Why should you choose our Stop Silent AS54 Wafer check valves?

  • Since 1942: Lasso Technik AG stands for quality and experience in the field of check valves
  • Inventor of the cone diaphragm - technological lead from in-house development
  • Proven experts with tried and tested know-how
  • High-quality materials for maximum reliability
  • Service life of up to 60 years
  • Maximum functional opening for optimum flow rate Particularly space-saving design (wafer design)
  • Spare parts available even after decades
  • Technical support from experienced engineers and technicians
  • Standard solutions and customized designs from a single source
Contact us - we will deliver the right solution for your application.
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