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Product Description

Mechanical disconnectors of this type are suitable for the protection of drinking water systems as required by EN 1717 "The technical regulation of drinking water systems". Their purpose is to protect systems against back pressure, back flow and back syphonage of non-potable water into the public water supply network. Mechanical disconnectors can be used to provide protection up to and including liquid category 3 (slightly toxic substances). Mechanical disconnectors therefore offer better protection than check valves.

Technical Properties


Cold drinking water

Liquid category (EN1717) class 3
DN size 50 mm
Port connection internal threads
Port diameter Rp 2 inch
Mounting position horizontal
Minimum inlet pressure 2,5 bar
Nominal pressure PN10
Max. media temperature 40 oC
Flow capacity Kvs 27
Body material red bronze RG5
Spring bonnet material synthetic material
Additional Descriptions
  • Low pressure drop and high flow rate
  • Optimal protection of the drinking water supply system
  • Enhanced protection against back pressure, back flow and back syphonage into the water supply network
  • Shut-off position visually indicated on the spring bonnet
  • Compact construction
  • Standardised discharge connection
  • All materials are KTW approved 
Set pressure 1,5 bar
Maximum inlet pressure 10 bar