49.0xx.x26

Non-return valve - type EA, EC

Pressure fluctuations in a water distribution circuit can cause a reversal of the flow direction. In this case a check valves, installed between the water distribution system and the mains water supply, closes automatically and prevents any back flow, back suction or back pressure. The inspection openings provided before each backflow preventer unit, allow a regular monitoring of the safe functioning of the component.
The series 49.0xx.x26, verifiable check valves, types EA and EC , is according to the performance requirements of DIN EN 13959 and are confirmed by an accredited laboratory. These are suitable, according to DIN EN 1717, for securing devices using category 1 and 2 liquids (according to WRAS the EC type is also applicable to fluid category 3).
Also check valves protect sensitive equipment from contamination from backflow (e.g. behind pumps), dry running through retention of water (e.g. before not self-priming pumps), cross flow in systems with varying line pressure (e.g. in parallel cold and hot water supplies ) and ensure the flow in only one direction in complex fluidic systems.
The verifiability offers the user the possibility of checking the operational reliability and can, optionally, be equipped with a manometer or other sensors.
Various configurations by combining different nominal orifice sizes and fluid connectors are available.

Check Valves 49.0xx 10 bar

Applications

  • Use in devices with direct connection to the drinking water supplies
  • Commercial cooking devices
  • Steam cooker
  • Pressure cooking devices
  • Water cooling equipment (e.g. X-ray equipment)
  • Vending machines
  • potable water dispenser
  • Avoiding of back flowing medium in the drinking water supply where backflow preventers according to DIN EN 1717 Type EA is allowed.

Characteristics

  • Safety device against backflow or back suction of liquids, e.g. in potable water networks
  • Suitable for fluid categories 1 and 2 in accordance to DIN EN 1717
  • Medium temperature 90 °C (194 °F) for 1 h possible
  • Compact design
  • Easy to retrofit
  • Function in accordance to 13959, confirmed by an accredited laboratory
  • Control ports with stainless steel plugs G 1/4 (Tightening torque max 1,5 Nm)
  • Manifold configuration options by combining various nominal widths and fluid connectors
  • Fluid connectors optional as female and male threads available.
  • Materials in fluid contact KTW-BWGL approved

Technical data

  • Type Non-return valve (check valve)
  • Construction Check valve cartridge in housing
  • Function Backflow prevention
  • Fitting position any
  • Media Cold and heated potable water and physically and chemically similar media
  • T-medium 5 - 65 °C
  •   90 °C max. for 1 h
  • T-Ambient 5 - 60 °C
  • Pressure range 0 - 10 bar
  • Control port G 1/4

Materials

  • Housing PA 6/6 glass fibre reinforced
  • Internal none-return cartridge housing POM
  • Internal none-return cartridge seal VMQ
  • Spring Stainless steel
  • Seal EPDM
  • Plug of control port PA 6/6 glass fibre reinforced
Technical inquiry
Technical inquiry

A. u. K. Müller GmbH & Co. KG

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GB - West Sussex BN16 3LP

Tel: +44 1903 788 888
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E-Mail: valves(at)akmuller.co.uk

 

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