EP Series - Electro De-Ionisation

The EP ultrapure water EDI plants are used to produce diluate with a typical conductivity < 0.2 μS/cm by treating reverse osmosis permeate via electrodeionisation (EDI). They are equipped with high quality EDI modules and a Siemens LOGO! controller.

Benefits

• Diluate with typical conductivity < 0.2 μS/cm
• Prepared for direct connection to an RO unit
• Piping in PP

Applications

• For further demineralisation of RO permeate
• For pharmaceutical or laboratory applications, power plants and microelectronics

Specifications

Controller:	PLC Siemens Logo
Resistance diluate without CO2 binding:	5 MΩ x cm
Resistance diluate with CO2 binding:	10 MΩ x cm
Recovery:	90 – 95 %
Diluate backpressure max.:	1.0 bar
Ambient temperature:	5 - 40 °C
Conditions of use:	The unit is designed for a permeate conductivity of 4-20 µS/cm, a CO2 concentration of 10 mg/l and free diluate discharge. The feed water must be softened (< 0.05 °dH) and treated via a reverse osmosis unit without a permeate buffer. The diluate quality depends on the permeate quality.  In addition, the following parameters must be maintained in the feed water:
Free chlorine:	not detectable
Silica	0.5 mg/l
Silt density index (SDI):	< 0.25
Feed water temperature:	5 – 35 °C
Feed water pressure:	2 – 4 bar
Pressure fluctuation:	± 0.5 bar
pH value feed water:	5.0 - 9.5