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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 of this type can be used to provide protection up to and including liquid category 4 (toxic, very toxic, carcinogenic and radioactive substances). The changeover from shutoff to flow positions can be by means of an hydraulic or electrical/electronic actuator. 

Technical Properties


Cold drinking water  

Liquid category (EN1717) class 4
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
Power supply 230V 50Hz
Additional Descriptions
  • 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 condition visually indicated on the spring bonnet
  • Compact construction
  • Standardised discharge connection
  • All materials are KTW approved 
  • Low pressure loss
Set pressure 1,5 bar
Maximum inlet pressure 10 bar