User guide

16-9
Filling Valves and Refilling Units
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The refilling combination serves filling and refilling of closed heating systems to DIN EN 12828:2003. It
can be connected in accordance to EN 1717 constantly with the drinking water supply. The refilling
combination combines backflow preventer, pressure reducing valve and two ball valves in one
appliance. All devices for refilling a heating installation according to conforming standards are
contained.
Standard version
Refilling combination, compact construction, NK295C
Materials Dezincification-resistant brass housing; discharge connection,
valve cartridge, valve insert and spring hood in high-grade
synthetic material; high-grade synthetic material check valve;
seals in NBR; spring steel adjustment spring; isolation shell in EPP
Media Water without inhibitors
Max. media temperature 65
o
C
Pressure setpoint range 1,5 ... 6 bar
Product description with 1/2" threaded connections
Additional description • Compact construction
• Constant connection with the drinking water supply in accor-
dance with EN1717 by hose line or piping is possible
• Corrosion resistant by use of brass and stainless steel
• Low pressure loss and high flow rate
• Optimal protection of the drinking water supply system
• Triple security - two check valves and a discharge valve sepa-
rate the backflow preventer into three pressure zones
• Field-tested reliable pressure reducing valve
• Pressure reducing valve with inlet pressure balancing - inlet
pressure fluctuation does not influence the outlet pressure
• Outlet pressure adjustable and directly at the pressure gauge
readable
• DIN/DVGW approved check valve
• Variable connection options to the heating system
• Low maintenance effort
• Meets KTW recommendations for potable water
Type
NK295C-1/2A