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Refilling combination, compact construction, NK295S

Refilling combination, compact construction, NK295S

Product Description

The refilling combination serves automatic filling and refilling from closed heating systems to DIN EN 12828:2014-07. The refilling combination can be connected in accordance to DIN EN 1717:2000 constantly with the drinking water supply. The refilling combination combines a CA type backflow preventer, pressure reducing valve and ball valves in one appliance. The refilling combination contains all devices for refilling a heating installation, according to conforming standards. 

Technical Properties

Product description with 1/2" threaded connections
Approvals
  • DIN/DVGW approved check valve
Media Water without inhibitors
Port connection external threads
Mounting position horizontal
Nominal pressure PN10
Outlet pressure 1.5 ... 6 bar
Max. media temperature 65 oC
Materials

Shut-off valve, up- and downstream in dezincification-resistant brass, high-grade synthetic material discharge connection, valve cartridge, valve insert, springbonnet, check valve and diaphragm in fibre-reinforced NBR, adjustment spring in spring steel, seals in NBR and EPDM, insulation shell in EPP. 

Maximum inlet pressure 10 bar
Minimum inlet pressure 1.5 bar
Liquid category (EN1717) class 3
Additional description
  • Permanent connection with the drinking water supply in accordance with EN 1717 by hose line or piping is possible 
  • Triple security - two check valves and a discharge valve separate the backflow preventer into three pressure zones 
  • Optimal protection of the drinking water supply system
  • Pressure reducing valve with inlet pressure balancing - inlet pressure fluctuation does not influence the outlet pressure
  • Field-tested, reliable pressure reducing valve 
  • Outlet pressure adjustable and directly visible on the pressure gauge
  • DIN/DVGW approved check valve
  • Compact construction
  • Low maintenance effort
  • Corrosion resistant by use of brass and stainless steel
  • Low pressure loss and high flow rate 
  • Variable connection options to the heating system
  • Meets KTW recommendations for drinking water

Products

Product Type
Standard version with threaded connection R1/2"

NK295S-1/2A