Skip Ribbon Commands
Skip to main content

Refilling combination, NK300S

Refilling combination, NK300S

The refilling combination serves filling and refilling of closed heating systems according to DIN EN 12828:2014-07. It can be connected in accordance with EN 1717:2000...

Product Description

The refilling combination serves filling and refilling of closed heating systems according to DIN EN 12828:2014-07. It can be connected in accordance with EN 1717:2000 permanently with the drinking water supply. The refilling combination combines a BA type backflow preventer, pressure reducing valve and two ball valves in one appliance. The unit consists of all needed devices for refilling a heating installation according to conforming standards are contained.

Technical Properties

Approvals DVGW
Media

Drinking water

Port connection external threads
Mounting position horizontal
Outlet pressure 1.5 ... 4 bar
Max. media temperature 65 oC
Materials

Dezincification resistant brass housing, complete backflow preventer with discharge connection, valve cartridge and valve insert in high-grade synthetic material, fibre-reinforced EPDM diaphragm, NBR and EPDM seals, spring steel adjustment spring, stainless steel fine filter mesh.

Liquid category (EN1717) class 4
Inlet pressure range 2 ... 10 bar
Preset Outlet Pressure 1.5 bar
Additional description
  • Permanent connection with the drinking water supply in accordance with EN 1717 by hose line or piping is possible
  • Optimal protection of the drinking water supply system
  • Pressure reducing valve with inlet pressure balancing - inlet pressure fluctuation does not influence the outlet pressure
  • Outlet pressure adjustable and directly visible on the pressure gauge
  • Low maintenance effort - cartridge insert and valve insert are completely replaceable
  • Meets KTW/ W270 regulations for drinking water

Certifications and Awards

Related Material

Products

Product Type Filter mesh
Standard version with 1/2" threaded connections

NK300S-1/2A
200 micron

NK300S-1/2AZ
25 micron

Accessories and replacement parts

Accessories

Image Description Product Type Downloads
Test kit. Analogue pressure measuring device with differential pressure display. With case and accessories, ideal for inspection and maintenance of backflow preventer type BA. TKA295  
Maintenance set for refilling combinations for use with TK295 resp. TKA295. WS300NK  
Replacement kit NK300 AK-NK300  

Spare Parts

Image Description Product Type Downloads
Pressure gauge with housing diameter 50 mm, connection thread G 1/4, 0 - 10 bar M38K-A10  
Union seal washer (10 pcs.) for size 1/2" 0901443  
Cartridge insert complete for size 1/2" 0903733  
Valve insert complete for size 1/2" D04FMA-1/2  
Blanking Plug set with 0-ring (5 pieces) for sizes 1/2" - 2" S06K-1/4  
Check valve for size 1/2" 0904138