Ionpure VNX Series CEDI Modules

Ionpure VNX-Max and VNX-Mini are single continuous electrodeionization (CEDI) modules for high-flow deionized water systems. A VNX-Max handles a nominal flow of 15.0 m³/h and up to 22.7 m³/h; the smaller VNX-Mini handles 12.0 m³/h nominal and up to 17.9 m³/h. As Ionpure’s OEM partner in Turkey, Mikron Proses (Üsküdar, Istanbul) supplies replacement VNX-Max, VNX-Mini and VNX55 (EP, EX, Ultra, HH, CDIT) modules and provides application consulting on DC3 power supply integration, chemical cleaning (CIP) and commissioning.

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For an overview of all Ionpure CEDI modules, see EDI / CEDI systems; for smaller flows see the Ionpure LX series and the Ionpure MX series.

Ionpure VNX models compared

Model	Nominal flow (m³/h)	Flow range (m³/h)	Max. feed conductivity equivalent (FCE) and hardness	Silica (SiO₂) removal	DC requirement
VNX-Mini	12.0	6.0 – 17.9	≤ 40 µS/cm, hardness ≤ 1.0 ppm	≥ 95%	Up to 7.0 A DC
VNX-Max	15.0	7.5 – 22.7	≤ 40 µS/cm, hardness ≤ 1.0 ppm	≥ 95%	Up to 600 VDC, up to 7.0 A DC
VNX55-EP (VNX28-EP)	12.5 (6.2)	5.7 – 18.7 (2.8 – 9.4)	≤ 40 µS/cm, hardness ≤ 1.0 ppm	≥ 95% (boron ≥ 95%)	300 VDC max. · 2 – 13.2 A (VNX28-EP: 1 – 6.6 A)
VNX55-Ultra (VNX23-Ultra)	12.5 (5.2)	9.5 – 15.0 (4.1 – 6.4)	≤ 10 µS/cm, hardness ≤ 0.1 ppm	≥ 99.8% (boron ≥ 99.8%)	VNX55: 600 VDC max.; VNX23: 300 VDC max. · 1 – 10 A
VNX55-HH (high hardness)	10.0	4.5 – 12.6 (80–90% recovery)	≤ 40 µS/cm, hardness ≤ 2.0 ppm	≥ 90% (resistivity ≥ 16 MΩ·cm)	600 VDC max. · 2 – 8.0 A
VNX30-CDIT (VNX15-CDIT)	6.8 (3.4)	3.4 – 10.2 (1.7 – 5.1)	≤ 100 µS/cm, hardness ≤ 4.0 ppm	≥ 95% (resistivity ≥ 16 MΩ·cm)	600 VDC max. · 2 – 13.2 A (VNX15-CDIT: 1 – 6.6 A)

Note: VNX55-EX (low-conductivity feed) runs at a nominal 12.5 m³/h (range 7.5 – 16.7 m³/h) with feed conductivity ≤ 10 µS/cm (hardness ≤ 0.1 ppm, silica ≤ 0.5 ppm), silica and boron removal ≥ 99%, 300 VDC max. and 10 – 13.2 A. Values are typical and depend on site conditions; the manufacturer’s IP-PRO projection software can be used to evaluate actual performance. Sources: manual IP-MAN-VNX-0526 (Tables 2-2, 2-4, A.3a, A.3b) and the VNX-Max and VNX-Mini datasheet.

VNX-Max and VNX-Mini: high flow in a single module

VNX-Max and VNX-Mini use the proprietary Flexmount™ connectors to stack modules with simple hydraulic connections, which keeps system design and capital cost low. At nominal flow, product water resistivity is typically above 17 MΩ·cm with RO permeate feed and above 18 MΩ·cm with DI water feed. Silica and boron removal is above 95%, and sodium and chloride removal is above 99.8%, at 90-95% recovery. Feed water hardness is limited to a maximum of 1 ppm (as CaCO3); the manufacturer names critical boiler feed water as a target application. The VNX-Mini delivers its nominal flow in a compact package, which allows smaller-footprint high-flow systems. The housing is made of fiberglass reinforced plastic (FRP) with a standard glossy white finish; an on-board junction box and PVC connection fittings and port plugs come with the module.

DC3 power supply

VNX modules run on a DC supply. The matching unit is the DC3 (IP-DC3PH600V-M1), a three-phase switch-mode rectifier and DC power controller for up to 600 VDC and 15 A that connects directly to a 380-480 VAC line without an isolation transformer. The VNX-Max works with up to 600 VDC and up to 7.0 A DC. The DC3 must be installed in a suitable electrical enclosure; see the product manual for details. Accessories include a 4.3-inch touch panel display (W2T829935) and Ethernet cables of different lengths (W2T394491, W2T394495). The VNX-Max and VNX-Mini are ordered as module only under W3T417958 and W3T417959. For a comparison of the DC3, DCR and G4 power supplies, see Ionpure DC3, DCR and G4 power supplies.

Choosing a VNX model

The choice between VNX-Max, VNX-Mini and the VNX55 variants depends on the required flow, the feed water source (RO permeate or DI water), the feed water hardness and the available electrical supply. Mikron Proses can review these together with you. For the background on the technology, see what is electrodeionization (EDI).