PSI Engineering Systems provides chemical injection skids for water treatment applications. Their core business involves packaged skid-mounted systems for cooling water, boiler feed water, and reverse osmosis chemical treatment. They offer a wide range of manually operated and fully automatic skids with dosing pumps, controls, and instrumentation to dose chemicals for processes like cooling towers, boilers, and water purification. PSI Engineering Systems designs, engineers, and manufactures customized chemical injection skids for various industries.

1. Chemical
Injection Skids
Engineering
SystemPSIEngineering Excellence

2. What We Do
We focus on packaged skid-mounted chemical
injection systems for cooling water & boiler feed
water treatment, for chemical dosing for pre-
treatment, post-treatment, and regeneration for
reverse osmosis, as well as dosing for water
purification & pollution control. This is our core
business
Our chemical dosing systems offer a wide range of
capacities to meet various chemical treatment
applications. Our Chemical dosing range includes
thefollowing:
Circulating cooling tower water treatment
dosingsystem(biocide,corrosioninhibitor,etc.)
Boiler feed water treatment dosing systems
(alkali,ammonia,hydrazine,defoamer,etc.)
Water purification, waste water treatment, and
pollutioncontrol.
Chemical dosing for pre-treatment, post
treatmentandregenerationforreverseosmosis
Processchemical/reagentdosingsystems
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Wehavebeeninthisbusinessforover30years
Our systems have been inspected and
accepted by almost all leading inspection
agenciesandOEM’s.
We also manufacture lube oil circulation system, lubricators for mechanical
seals, fuel oil handling systems, oxygen dosing systems, and a host of allied
systemsforthepower&boilersector,andtheoil&gasindustry.
A Wide Range of Systems
Our skid-mounted systems are available as manually operated, as well as fully
automatic systems, which include all instrumentation and controls for
sensing&correctingpH,conductivity,&otherparameters.
We offer a wide variety of systems in different sizes and configurations, as
well as a huge variety of dosing pumps & control/sensing equipment. We
have tied up with leading international suppliers of dosing pumps and
ancillarydosingequipment,foroursystems.
Rangeofpressures:
HPDosing:upto400bar
LPDosing:from1barOnward
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Rangeofflowrates:
From0.10lit/hr Onward
Upto1500lit/hr andmore
Upto 10,000 lit/hr (polymer
dosing)
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Awiderangeofconfigurations:
Singletanksystems
Withsinglepump
Withtwinpumps
With4pumps(2streams)
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Twintanksystems
Withsinglepump
Withtwinpumps
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Weofferahugerangeofsystems,foreveryapplication:
Engineering
SystemsPSI

3. Lowcostcompactsystems
AutomaticDosingSystems
PolymerDosingSystems
Motor Driven Pumps
PackedPlungerpumps
MechanicalDiaphragmPumps
HydraulicDiaphragmpumps
ElectronicDosingPumps
SingleScrewPumps(PolymerDosing)
A Range of PumpTypes:
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Arangeofcontrolmechanisms&instrumentation:
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Withmanualstrokecontrol
Withauto-strokecontrol
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WithVFDspeedcontrol
W i t h p l a n t a u t o m a t i o n
interface
Awiderangeoffabrication&pipingmaterials:
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CarbonSteel
CarbonSteel+RubberLining
Arangeofrubberqualities
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Stainless Steel AISI-304, AISI-
316,etc.
Plastics:PVC,PP,FRP,etc.
We design our systems to suit the user’s application. Special systems
canbedesigned&fabricatedforspecificapplications
Control & Instrumentation
Our systems are complete with all required instrumentation and control
systems. Our system control panels are available in both PLC-based as well as
relay based types, complete with plant automation interfaces, where
required.
We are a “one-stop shop”, providing end-to-end system solutions, for both
mechanicalsystemsaswellascontrol/instrumentationsystems.
Quality Systems
Our Dosing Systems conform to most
accepted international standards like
ASTM, ASME, DIN, etc., and are
manufactured according to approved
quality plans. Components are
sourced from the best international
suppliers. Quality Control checks are
carried out at every stage. Our
products have been accepted by all
leading inspection agencies and major
users/OEM’s.
Engineering
SystemsPSI

4. Chemical Injection Skids are used by a wide cross section of
Industry:
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Typicalapplicationsinclude:
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OilandNaturalGasExploration&Refining
IronandSteel
Chemicalsprocessingindustries
Pulp&Papermanufacture
ThermalPower
Water&EffluentTreatment
Food&Pharmaceuticalindustries
Personalcareproducts
MachinebuildingIndustry
Semiconductormanufacturing
InhibitorDosing(Coolingwatertreatment)
PhosphateDosing/HydrazineDosing(BoilerFeedWatertreatment)
DyeDosing(PetroleumIndustry)
LubricationofRollingMills(SteelIndustry)
ReagentDosing(Pharmaindustry)
DosingpaperChemicals(PaperIndustry)
Fundamentals of Dosing
Dosingskidstypicallyconsistof:
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Storagetanksorsolutionpreparationtanks,with
Mixers(agitators)
LevelGauges
InterconnectingPiping
PipeFittings
Valves
Instrumentationforflow/pressure
The total assembly is commonly referred to as DOSING SYSTEM or Chemical
InjectionSkid.
AWell-DesignedSystemShouldBe:
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BoilerFeedwaterDosing:
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Very compact, save space, and be convenient for plant installation as
wellasplantoperation
Advanced instrumentation features can be incorporated into the
systems, for compete auto-control & data logging, through plant
interface
Considerable design and detailed engineering efforts are required for
designing individual components of the skid, and in integrating the
componentsintomakingacompactandefficientsystem.
Chemical conditioning of feed water / steam condensate cycle, is essential to
preventcorrosionandscaleformation.Dosingcanbeoftwotypes:
H.P.(HighPressure)
L.P.(LowPressure)
Corrosion: Corrosivecomponents,especiallyO2andCO2havetoberemoved,
usually by use of a deaerator. Remnants can be removed chemically, by use of
oxygenscavenger.
Feedwater has to be alkalized to a pH of 9 or higher, to reduce oxidation and to
support the forming of a stable layer of magnetite on the water-side surface of
the boiler, protecting the material underneath from further corrosion. This is
usually done by dosing alkalies into the feedwater, like sodium hydroxide
(causticsoda)orvolatileammonia.
The boiler feed water treatment is normally done with the following
chemicals:
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Hardnessstabilisers
Deflocculatingagents
Corrosioninhibitors
Oxygen binding agents (e.g.
hydrazine)
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pH value regulation (caustic soda,
ammonia)Hardnessstabilisers
Defoamingagents
H.P.(HighPressure)DOSING
Engineering
SystemsPSI

5. H.P.(HighPressure)DOSING
Corrosion rate of M.S. surface is lowest, when pH is between 9 - 10. Dosing is
therefore done, to maintain pH & reduce scaling. Generally, phospate solution
is dosed into the boiler drum, under full boiler pressure. Hence the term “High
PressureDosing”.
Dissolved oxygen in feed water causes serious corrosion. Hence "oxygen
scavengers" or "de-oxygenators" are dosed into feedwater. Dosing done into
feed water stream, either at BFP suction, or at deareator, at low pressures.
Hencetheterm“LowPressureDosing”.
Manually operated dosing systems, utilizing standard mechanical dosing
pumps, will satisfy the needs of most steady-state operations. Where process
conditions require frequent changes in dosing conditions, auto-controlled
systemsareneeded.
L.P.(LowPressure)DOSING
The dosing system has to ensure proper
integration of the sensors and the control
settingswiththepumpoperation.
These advances result in extremely
compactdosingsystems
These systems have features which are
not possible with manual dosing
systems.
Refurbishment
We offer refurbishment services for used dosing systems (life extension
services). In addition to upgradation/refurbishment of mechanical
equipment, we also undertake upgradation of older system control panels to
bring it in line with modern digital controls and DCS plant interfaces. These
services are offered at our works and the service detalis will vary according to
theconditionoftheoldequipment.
Engineering Services
We have a fully equipped design centre,
where we do detailed design engineering
for all types of fluid handling systems, such
as Dosing Systems, Fuel Oil Systems, Lube
Oil systems, Oxygen Dosing Systems, etc.
Wespecialiseinbasicaswellasdetail
engineering of these systems, and we can generate process flow diagrams, GA
drawings, plant layouts, etc., as well as generate engineering data for the
same. Apart from design validation, we can do 3-D modelling and also carry
outstructuralstressanalysisandrelateddesigndata.
Auto-controlled systems are responsive
to changes in process conditions,
requiring frequent changes in dosing
conditions, done automatically. Auto-
control dosing systems need external
logic controllers, which take signal from
process sensors, and adjust dosing
accordingtopre-determinedvalues
Automatic Dosing Systems are
preferred by most users, to reduce
operatorintervention
The chemicals are fed into the system by automatic feeders on timers, or
actuated by conductivity /pH meters. Automatic chemical feeding tends to
decreasechemicaldosingrequirements.
Auto-dosing is widely used in cooling water applications, in thermal power
stations,andinprocessindustries.
Engineering
SystemsPSI

6. Engineering
SystemsPSI
Contact Us
PSI Engineering Systems FZC
P.O.Box 53776,
Hamriyah Free Zone,
Sharjah, United Arab Emirates
email: mail@psiengg-me.com
www.psiengg.com / www.psiengg-me.com
Sales Office:
Eurobase Trading LLC
Suite # 1302, 13th Floor,
SIT Tower, Dubai Silicon Oasis,
Dubai, United Arab Emirates
P.O. Box: 50503
Tel: +971 4 3423353/ +971 4 3423351
Fax: +971 4 3423341