S Series EDI Module – Equipment for Preparing Ultrapure Water

The S series EDI modules utilize ion exchange and electrodialysis technology to effectively remove ions from water, making them ideal equipment for the preparation of ultrapure water. Ultrapure water obtained through EDI technology is widely used in fields with high water quality requirements, such as microelectronics industry, semiconductor industry, power generation industry, pharmaceutical industry, and laboratories.

S-series EDI modules can be flexibly designed according to different requirements. We can provide a two-in-two-out structure with a unified discharge of dilute and concentrated water; we can also offer a two-in-three-out structure with separate discharge of dilute water. Based on the specific requirements of our customers, we will recommend the most suitable EDI membrane stack solution to ensure the efficient operation of the system and the exceptional quality of ultrapure water.

Specification
Working Principle
Features
Videos

Specification

L Series

Perfect replacement for ionpure module
H Series

No separate discharge design for dilute water
G Series

Perfect replacement for E-CELL module
P Series

Replacement for laboratory ion exchange filter cartridges

Specification

Table 1: L Series EDI Module Specification
Model	Design Product Flow Rate (m³/h)	Minimum Product Flow Rate (m³/h)	Maximum Product Flow Rate (m³/h)	Recovery Rate (%)	Product Water Resistivity (MΩ·cm)	Operating Voltage DC V	Design Voltage DC V	Operating Current DC A	Design Current DC A	Freshwater Pressure Drop (Mpa)	Maximum Inlet Pressure (Mpa)
SEDI-05L	0.5	0.22	0.67	90–95	≥ 15	≤ 200	0–200	≤ 6	0–6	0.10–0.30	0.70
SEDI-10L	1.0	0.55	1.35	90–95	≥ 15	≤ 200	0–200	≤ 6	0–6	0.10–0.30	0.70
SEDI-20L	2.0	1.1	2.8	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70
SEDI-25L	2.5	1.4	3.5	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70
SEDI-30L	3.0	1.7	4.2	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70
SEDI-50L	5.0	2.55	6.8	90–95	≥ 15	≤ 500	0–500	≤ 6	0–6	0.22–0.40	0.70
SEDI-70L	7.0	3.8	7.8	90–95	≥ 15	≤ 500	0–500	≤ 6	0–6	0.22–0.40	0.70
SEDI-80L	8.0	6.5	9.5	90–95	≥ 15	≤ 500	0–500	≤ 6	0–6	0.22–0.40	0.70

Specification

Table 2: H Series EDI Module Specification
Model	Design Product Flow (m³/h)	Minimum Product Flow Rate (m³/h)	Maximum Product Flow Rate (m³/h)	Recovery Rate (%)	Product Water Resistivity (MΩ·cm)	Operating Voltage DC V	Design Voltage DC V	Operating Current DC A	Design Current DC A	Freshwater Pressure Drop (Mpa)	Maximum Inlet Pressure (Mpa)
SEDI-05H	0.5	0.3	0.7	90–95	≥ 15	≤ 200	0–200	≤ 6	0–6	0.10–0.30	0.70
SEDI-10H	1.0	0.7	1.5	90–95	≥ 15	≤ 200	0–200	≤ 6	0–6	0.10–0.30	0.70
SEDI-20H	2.0	1.4	2.5	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70
SEDI-30H	3.0	2.4	3.8	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70
SEDI-40H	4.0	3.2	4.8	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.15–0.40	0.70

Specification

Table 3: G Series EDI Module Specification
Model	Design Product Flow Rate (m³/h)	Minimum Product Flow Rate (m³/h)	Maximum Product Flow Rate (m³/h)	Recovery Rate (%)	Product Water Resistivity (MΩ·cm)	Operating Voltage DC V	Design Voltage DC V	Operating Current DC A	Design Current DC A	Freshwater Pressure Drop (Mpa)	Maximum Inlet Pressure (Mpa)
SEDI-30G	3.0	1.5	4.0	90–95	≥ 15	≤ 340	0–350	≤ 6	0–6	0.20–0.40	0.60
SEDI-50G	5.0	2.5	6.0	90–95	≥ 15	≤ 500	0–500	≤ 6	0–6	0.2–0.40	0.60

Specification

Table 4: P Series EDI Module Specification
Model	Design Product Flow Rate (l/h)	Minimum Product Flow Rate (l/h)	Maximum Product Flow Rate (l/h)	Recovery Rate (%)	Product Water Resistivity (MΩ·cm)	Operating Voltage DC V	Design Voltage DC V	Operating Current DC A	Design Current DC A	Freshwater Pressure Drop (Mpa)	Maximum Inlet Pressure (Mpa)
SEDI-50P	50	30	60	90–95	≥ 15	24–40	0–200	0.5–1.0	0–6	0.05–0.30	0.40
SEDI-100P	100	80	120	90–95	≥ 15	24–40	0–200	0.5–1.0	0–6	0.08–0.30	0.40
SEDI-200P	200	160	240	90–95	≥ 15	40–70	0–200	0.5–1.0	0–6	0.10–0.40	0.40
SEDI-250P	250	200	300	90–95	≥ 15	40–70	0–200	0.5–1.0	0–6	0.10–0.40	0.40

Working Principle

The internal structure of the EDI module contains ion exchange resins and alternating anion exchange membranes and cation exchange membranes. After the feed water after secondary reverse osmosis treatment enters the EDI module, the water flows through these membranes. Under the action of the electric field, cations (such as Na+) in the water are adsorbed and migrated by the cation exchange membrane, while anions (such as Cl-) are adsorbed and migrated by the anion exchange membrane. Through this electric field-driven selective migration process, the salt in the water is effectively separated, resulting in high-purity produced water.

In this process, the separated cations and anions are concentrated in the concentrated water compartment of the membrane stack to form a concentrated salt solution (concentrated water). This concentrated water can be recycled or further treated after discharge.

Features

It adopts special resin filling process, minimum working voltage, energy saving (power saving) and environmental protection.
No salt and water circulation systems are required.
It uses homogeneous ion exchange resin with the high exchange capacity and strong selectivity.
Excellent mechanical design, unique sealing technology, never leak.
Modular design makes installation, maintenance and operation simple, and the equipment occupies a small area.
Waterway and power supply are all in the same side, easy to install.
Fresh water and product water are the same water stream.
The water flow distribution is carried out in the module after the electrode water and concentrated water both entering the module.
Concentrated water outlet and electrode water outlet are in the same pipe, facilitating uniform discharge and regulation.
Fresh water flow and concentrated water flow use staggered flow to prevent concentration polarization.