SN Series EDI Module – Two-In-Two-Out Structural Design

The SN series EDI module is specifically designed for industrial applications, capable of reliably producing high-purity water with stable quality, without interruption due to regeneration, and is widely used in the power, electronics, food and beverage industries, as well as in laboratories.

The SN series EDI modules have significantly reduced requirements for feed water quality, are resistant to acids and bases, and can undergo unlimited chemical cleaning. The product water quality reaches above 16 MΩ and can remain stable above 16 MΩ for an extended period.

Specification
Working Principle
Features
Videos

Specification

SNEDI Module

Table 1: SNEDI Module Specifications (Continuous operation up to 45 °C)
Module Number	Nominal Flow (m³/h)	Flow Range (m³/h)	DC Voltage (V)	DC Current (A)	Transport Weight (kg)
SNEDI-05	0.44	0.22–0.67	0–55	0–5	55
SNEDI-10	1.0	0.55–1.65	0–135	0–5	71
SNEDI-20	2.0	1.0–3.1	0–240	0–5	94
SNEDI-30	3.3	1.7–5.1	0–320	0–5	124
SNEDI-50	5.0	2.55–7.7	0–400	0–5	170

SNEDI-H Module

Table 2: SNEDI-H Module Specifications (Continuous operation up to 60 °C)
Module Number	Nominal Flow (m³/h)	Flow Range (m³/h)	DC Voltage (V)	DC Current (A)	Transport Weight (kg)
SNEDI-04H	0.44	0.22–0.67	0–55	0–6	55
SNEDI-10H	1.1	0.55–1.65	0–135	0–6	71
SNEDI-18H	2.0	1.0–3.1	0–240	0–6	94
SNEDI-24H	2.8	1.4–4.2	0–300	0–6	118
SNEDI-30H	3.3	1.65–5.1	0–320	0–6	124
SNEDI-45H	5.0	2.55–7.7	0–400	0–6	170

Working Principle

A direct current (DC) electric field applied across the anode (+) and cathode (-) at both ends of the EDI module drives the rapid migration of ions on the surface of the ion exchange resin, allowing cations and anions to selectively permeate through the cation/anion exchange membranes into the concentrate chamber. In specific areas of the freshwater chamber, the splitting of water can generate a large amount of H+ and OH-, and under the influence of the direct current electric field, H+ and OH- displace the inorganic salt ions bound to the exhausted resin, completing regeneration and achieving continuous, efficient operation.

Features

SNEDI Module

Adopting double O-ring seals to ensure leak free operation
The water quality of the produced water is better than that of the mixed bed effluent and does not require the use of chemical agents for regeneration continuous water production and stable water quality
No need to use acid-base neutralization system and resin tank
Excellent electrical insulation property
Continuous operation at 7 bar (100 psi) and 45 °C (113 °F)

SNEDI-H Module