The 500 LPH EDI Module is a continuous electrodeionization stack that takes reverse osmosis permeate and polishes it to ultrapure water suitable for laboratory instruments, reagent preparation, autoclaves, glassware rinsing and pharmaceutical water loops. It combines ion-exchange resin, ion-selective membranes and a DC electrical field so the resin is regenerated continuously inside the stack. There is no resin change-out, no acid or caustic handling, and no regeneration waste to neutralise before drain.

EDI module Oman - 500 LPH electrodeionization stack for ultrapure laboratory water

This listing is for the EDI module stack only — the module itself, supplied as a component for integration into a new or existing system. Pre-treatment, RO unit, feed pump, DC power supply, instrumentation and skid are not included. If you need a complete turnkey lab ultrapure skid, contact us and we will size and quote the full system.

Why choose an EDI module in Oman

Groundwater and municipal supply across Muscat and the interior typically runs 500–2,000+ ppm TDS. Even after a well-designed RO stage, permeate conductivity is usually too high for Type I / Type II laboratory water. Mixed-bed DM polishing gets you there but brings resin regeneration, chemical storage and downtime. EDI removes that burden: it runs continuously, produces stable resistivity, and its only consumables are electricity and a small concentrate reject stream.

EDI module features & benefits

Continuous electrical regeneration — no acid or caustic on site, no resin replacement, no regeneration downtime.
15–17 MΩ·cm product water — stable resistivity suitable for Type II lab water, and Type I when followed by a final polisher and 0.2 µm filter.
90–95% recovery — low reject volume, which matters where water cost and disposal are a concern.
Thin-cell stack design — resin-filled dilute and concentrate compartments give consistent silica and CO₂ removal at low power draw.
PP / ABS housing with SS316 tie rods — corrosion-free wetted path, no metal leaching into the product stream.
Straightforward integration — standard threaded connections and a DC supply are all that is needed to add it downstream of an existing RO unit.
Silica and boron reduction — removes the weakly ionised species that RO alone passes through.

Applications

Hospital and clinical laboratories — analysers, reagent water, washer-disinfectors
University, school and research laboratories
Pharmaceutical purified water and WFI pre-treatment loops
Electronics, plating and battery manufacturing rinse water
Power plant and boiler feed polishing
Cosmetics, food and beverage process water

EDI module technical specifications

Parameter	Value
Product flow rate	500 LPH (0.5 m³/h, approx. 3,170 GPD)
Product water quality	15–17 MΩ·cm (typical), >95% silica removal
Recovery	90–95%
Feed water source	RO permeate only
Feed conductivity	1–40 µS/cm (equivalent CO₂ included)
Feed hardness	< 1.0 ppm as CaCO₃
Free chlorine / oxidants	< 0.05 ppm
Total organic carbon (TOC)	< 0.5 ppm
Iron / manganese / sulphide	< 0.01 ppm
Silica (reactive)	< 0.5 ppm
Carbon dioxide	< 5 ppm
Feed temperature	5–40 °C
Feed pressure	2.0–4.0 bar (max 6.9 bar)
Power supply	0–300 V DC, adjustable (DC rectifier not included)
Typical power draw	Approx. 0.3–0.6 kW at rated flow
Connections	3/4″ product / feed, 1/2″ concentrate and electrode (threaded)
Materials of construction	PP / ABS cell frames, SS316 tie rods, ion-exchange resin and heterogeneous ion-selective membranes
Mounting	Vertical, floor or frame mounted
Concentrate handling	Recycle loop standard, partial bleed to drain

Specifications are typical for a 500 LPH class module and are confirmed against the supplied datasheet at the time of order.

Scope of supply

1 × 500 LPH EDI stack, assembled and pressure tested
Preservative-filled and sealed for shipping
Manufacturer datasheet, operating limits and start-up instructions

Not included: RO system, pre-treatment, feed and recycle pumps, DC power supply / rectifier, control panel, resistivity monitor, flow meters, valves, piping, frame or skid, installation and commissioning. All of these can be quoted separately.

Installation requirements

Upstream RO producing permeate within the feed limits above
Stable feed pressure of 2–4 bar and a drain point for concentrate
Regulated DC power supply sized to the module
Indoor, shaded location, ambient below 40 °C, protected from freezing and direct sunlight
Clearance for vertical removal and servicing

EDI module maintenance

Log product resistivity, feed conductivity, flows, pressures and DC current weekly
Verify RO permeate quality monthly — EDI life depends almost entirely on feed quality
CIP cleaning only when resistivity or current trends indicate fouling or scaling
Typical stack service life of 5–7 years when operated within specification

Warranty

12 months against manufacturing defects from the date of supply, subject to operation within the published feed water and electrical limits. Damage from out-of-spec feed water, chlorine exposure, scaling or incorrect DC polarity is not covered.

Why UV Water Systems

UV Water Systems (Uniqueness View LLC) has been designing and servicing water treatment systems in the Sultanate of Oman for over 14 years, and is ISO 9001:2015 certified. We supply RO plants, DM plants and EDI systems to hospitals, laboratories, oil and gas facilities and government entities across Muscat and the wider Sultanate, and we back every system with local technical support and after-sales service.

Contact us for a free consultation and system sizing: +968 9763 7786 | sales@waterfilteroman.com

EDI module supply and support in Oman

We stock and supply this EDI module in Muscat and deliver across the Sultanate. The EDI module is normally installed downstream of a two-pass RO or an RO plus degasser, and it replaces the mixed-bed polisher in a conventional DM train. If you are comparing options, see our mixed bed ion exchange resin, our fully automated PLC DM plant and our strong base anion exchange resin for regenerable alternatives.

Feed water to the EDI module must meet the stack specification for conductivity, hardness, CO2, TOC, silica and free chlorine. Laboratory water purity classes are defined in ASTM D1193 reagent water standards, and membrane and resin selection follows DuPont Water Solutions design practice. Send us your RO permeate analysis and required flow, and we will confirm whether this EDI module suits your duty or whether a larger stack is needed.

وحدة EDI بسعة 500 لتر/ساعة – لإنتاج المياه فائقة النقاء للمختبرات في سلطنة عُمان

وحدة إزالة الأيونات الكهربائية (EDI) بسعة 500 لتر في الساعة (0.5 م³/ساعة) مصممة لتنقية مياه التناضح العكسي وإنتاج مياه فائقة النقاء بمقاومة تتراوح بين 15 و17 ميجا أوم·سم، دون الحاجة إلى أحماض أو قلويات لإعادة تنشيط الراتنجات.

تعتمد الوحدة على مجال كهربائي مستمر يعيد تنشيط الراتنج داخل الخلية باستمرار، مما يلغي تكاليف المواد الكيميائية وتوقف التشغيل المرتبط بمحطات إزالة العسر التقليدية. معدل الاسترجاع من 90 إلى 95 بالمئة، مع إزالة فعالة للسيليكا وثاني أكسيد الكربون وباقي الأيونات ضعيفة التأين.

الاستخدامات: مختبرات المستشفيات والتحاليل الطبية، مختبرات الجامعات ومراكز الأبحاث، مصانع الأدوية ومستحضرات التجميل، مياه الغسيل في صناعة الإلكترونيات والطلاء، ومياه تغذية الغلايات ومحطات الطاقة.

ملاحظة: هذا المنتج يشمل خلية EDI فقط. لا تشمل نظام التناضح العكسي أو المعالجة الأولية أو المضخات أو مصدر التيار المستمر أو لوحة التحكم أو التركيب.

الضمان: 12 شهراً ضد عيوب التصنيع عند التشغيل ضمن الحدود المحددة لجودة مياه التغذية.

شركة UV Water Systems – يونيكنس فيو ش.م.م، معالجة المياه في مسقط، سلطنة عُمان. حاصلون على شهادة الأيزو 9001:2015 وخبرة تتجاوز 14 عاماً. للاستفسار: +968 9763 7786 أو sales@waterfilteroman.com

DM plant

500 LPH EDI Module – Electrodeionization Stack for Ultrapure Lab Water | Oman