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Installer manual Fleck 2850 NXT/NXT2 - Description
3
Description
3.1
Technical specifications
Design specifications/ratings
Valve body
Rubber components
Weight (valve with controller)
Recommended operating pressure
Maximum inlet pressure
Hydrostatic test pressure
Water temperature std
Water temperature for HW volumetric 1 - 65°C (only with mechanical or electronical stainless
Water temperature for HW time clock 1 - 82°C
Ambient temperature
Regeneration flow
Bypass of raw water during
regeneration:
Standard
NBP version
Flow rates (3.5 bar inlet - valve only - top mount)
Continuous service flow (Δp = 1 bar)
Peak service flow (Δp = 1.8 bar)
Cv*
Kv*
Maximum backwash flow
(Δp = 1.8 bar)
*Cv: Flow rate in gpm across the valve at a pressure drop of 1 psi at 60°F.
3
*Kv: Flow rate in m
/h across the valve at a pressure drop of 1 bar at 15.5°C.
Valve connections
Tank top mounted adapter
Inlet/Outlet
Riser tube
Drain line
Brine line (1600/1650)
Brine line (1700/1710)
14 / 174
Brass
EP or EPDM
10.0 kg (max)
1.8 - 8.6 bar
8.6 bar
20 bar
1 - 43°C
steel meter)
5 -40°C
DF
Yes
No
3
11.6 m
/h
3
15.0 m
/h
13.2 gpm
3
11.4 m
/h
3
11.1 m
/h
4" – 8 UN
1½" BSP female
50 mm [DN40]
1" NPT
⅜"
½"
Ref. MKT-IM-031 / D - 16.01.2023
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