DEMINERALISATION equipment servicing

Service - Maintenance Packages
Planned Service and Maintenance visits per year2 or 42 or 42, 4 or 62, 4 or 6
Electronic reports emailed direct to 2 addresses
Breakdown response time (Hours)482424 or 1224, 12 or 6
Breakdown callout charge coveredNoNoNo
Breakdown callouts discountedNoNo
Annual consumables pack includedNo
Spare parts used and annual consumables includedNoNoNo
Discounted consumablesNo
24 Hour tech support telephone number
Site specific reports and equipment history records issuedNo
Service Package Optional Extras
Optional ExtrasBronzeSilverGoldPlatinum
Annual Resin Analysis
Spares Holding Facility
Media Replacement
Resin Analysis
RO Membrane Cleaning
Disinfection and Sanitisation


Demineralisation Typical Service Schedule

(Please note that this is a typical specification and Industrial Water Equipment Ltd provide site specific service schedules for your sites specific requirements)

Routine Service On each Routine Service the following actions will be carried out;

1. Site Compliance

Contact responsible person. Advise purpose of visit.
Obtain any necessary permits for access to site and/or work area.
Agree protocol for interrupting electrical and water supply to Demineraliser.
Wear safety clothing in accordance with site and IWE standards.
Display any necessary notices advising of work being carried out.
Restore electrical and water supplies upon completion of work.
Remove any signs and leave work area in a satisfactorily clean and tidy condition.
Obtain responsible person’s signature on IWE documentation.
Return permits and leave site.

2. Records

Examine site records to establish performance of plant since last service visit.
Record any variation in raw and treated water quality and establish reason for any variance from last visit.
Confirm treated water volumetric and quality requirements.

3. Water Quality

Analyse total dissolved solids content of the demin inlet water and record.
Analyse total dissolved solids content of the demin outlet water and record.
Analyse total dissolved solids of any stored treated water quality and record.
Take dipslide of;

Raw inlet water to Demineraliser.
Outlet water from Demineraliser vessels.
Any stored treated water.
NOTE: Dipslides take a number of days to incubate and produce a result. Any results subsequently found to be unsatisfactory will be communicated as soon as possible along with written recommendations for remedial action.

4. Mechanical Checks

Inspect general condition of demineraliser and associated ancillaries and check for any leaks.
Examine electrical connections for any incorrect wiring, for evidence of overloading etc.
Initiate operation of any level controls and check satisfactory flow results (safe access permitting).
For conductivity controlled models check and record set point and check controller calibration. Compare to previous visit.
For Water Meter controlled models check and record water meter setting. Compare to previous visit.
If a totalising water meter is installed check water flow and volume used. Compare to previous visit.
If pressure gauges are fitted at suitable points, check static and dynamic pressure before and after Demineraliser. Record pressure drop and comment. Advise if inlet pressure is within limits for satisfactory and safe Demineraliser performance.
If pressure gauges are not fitted, but suitable points exist, install temporary pressure gauge(s) and complete as much of 1.4.7. as is practical.

5. Regeneration

Check condition of regenerants tanks and any associated equipment.
Check acid level in day tank prior to regeneration.
Initiate test regeneration.
Check acid draw to Demineraliser in terms of time and volume.
Check caustic draw to Demineraliser in terms of time and volume.
Where applicable check regenerants tanks refill.
If applicable check acid/caustic dilution post regeneration.
Check for resin loss during regeneration.
Analyse chemical quality of outlet water from Demineraliser plant immediately after regeneration and record.

6. Annual Service

On each Annual Service the following actions will be carried out in addition to those for a Routine Service.

Diaphragm Valve(s) (Where Fitted) Examine and clean thoroughly. Fit new diaphragm if necessary. (For non IWE Demineralisers, replacement components will be charged in addition to the contract price).

NOTE: Control valves not connected solely with Demineraliser operation, e.g. a control valve controlling flow into a treated water storage tank, are not covered by the Standard Demineraliser Service Contract but can be, at additional cost, if required.

7. Demineraliser Control Valves.

The Demineraliser Control Valves will be inspected in-situ and examined for wear.

When deemed necessary and included in the agreement, the Demineraliser valve will be removed from the resin vessel and the bed depth in the vessels will be checked for resin loss. (Subject to site survey on non IWE Demineralisers).

The Demineraliser Control Valves including the injector, will be thoroughly cleaned, moving parts greased and re-assembled with the new components supplied in the 12 months Spares Pack. (For non IWE Demineralisers, replacement components will be charged in addition to the contract price).

NOTE: Where the Demineraliser Control Valve(s) incorporate the use of automatic diaphragm valves these will be dismantled, cleaned thoroughly, greased and re-assembled. Should the valve show signs of wear, a recommendation will be made for overhaul at the next service visit. (Subject to site survey on non IWE Demineralisers).

8. Return To Service

When the Service Visit, either Routine or Annual, has been completed the Demineraliser will be checked to ensure all components are fully operational.

The Demineraliser(s) will be left in an operating condition with inlet and outlet valves open, by-pass valve closed and blending valves adjusted as appropriate.

All actions, results, recommendations and comments will be recorded on the Engineered Product Service Call Sheet which will be signed by the Service Engineer and the Customer. A copy will be left on site with the customer on completion of the visit.


We Guarantee to beat any like for like quote for Water Treatment and Parts by 10% and any like for like Service Contract by 20%

Need Help?

Need advice on which service package best suits your requirements?
Contact our experts on
01629 363311

we are more than happy to help.