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Boiler Feed Water Systems

Protect boilers with precisely treated feed water. Hydroxy designs Boiler Feed Water Systems to control hardness, dissolved minerals, silica and other water-quality parameters—helping reduce scale, corrosion and deposits while supporting reliable boiler and steam-system performance.

Boiler Feed Water Systems

Boilers require carefully conditioned water to operate reliably. Untreated or inadequately treated feed water can introduce hardness, dissolved salts, silica, suspended matter and dissolved gases into the boiler system. Under high temperature and pressure, these contaminants can contribute to:

  • Scale Formation
  • Boiler Deposits
  • Corrosion
  • Reduced Heat-Transfer Efficiency
  • Increased Blowdown
  • Higher Energy Consumption
  • Steam-Quality Problems
  • Equipment Damage & Unplanned Shutdowns

Hydroxy Water Technologies designs Boiler Feed Water Systems according to source-water chemistry, boiler pressure, steam demand, condensate-return percentage and required feed-water quality.

The objective is to provide a stable supply of correctly treated water that supports efficient steam generation and long-term boiler protection.

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Boiler Feed Water Treatment Principle

Remove What Can Damage the Boiler Boiler feed-water treatment works by progressively removing or controlling contaminants before the water enters the boiler.

A typical treatment sequence may include: Raw Water → Pre-Filtration → Hardness / Mineral Reduction → High-Purity Treatment → Deaeration / Conditioning → Boiler Feed Water

Pre-Filtration

Suspended solids and turbidity are reduced to protect downstream treatment equipment.

Hardness Control

Calcium and magnesium are reduced to minimise scale-forming potential.

Dissolved-Solids Reduction

Where required, membrane or ion-exchange treatment reduces dissolved salts and minerals.

Silica Control

For applications requiring tighter water quality, silica is controlled to help reduce deposit and steam-purity problems.

Dissolved Gas Control

Oxygen and other dissolved gases are reduced or chemically controlled where required to minimise corrosion.

Final Conditioning

Chemical dosing may be incorporated according to boiler operating requirements. The principle is simple: remove or control harmful impurities before they reach the boiler.

Engineered Around Your Boiler Operating Conditions - Feed-Water Quality Depends on the Boiler

A Boiler Feed Water System should not be selected only by litres per hour. As boiler pressure and operating demands increase, the required feed-water quality generally becomes more stringent. Hydroxy evaluates important parameters such as:

  • Boiler Operating Pressure
  • Steam Generation Capacity
  • Raw-Water Quality
  • Total Hardness
  • TDS / Conductivity
  • pH, Alkalinity
  • Silica, Iron
  • Dissolved Oxygen
  • Condensate Return
  • Make-Up Water Requirement
  • Blowdown Requirement
  • Required Feed-Water Quality

These parameters determine the appropriate treatment sequence, system capacity and level of purification required.

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Treatment Configuration

Depending on feed-water quality and boiler requirements, a Hydroxy Boiler Feed Water System may incorporate:

  • Pressure Sand / Multimedia Filtration
  • Activated Carbon Filtration
  • Water Softening
  • Cartridge Filtration
  • Reverse Osmosis
  • Demineralisation
  • Mixed Bed Polishing
  • Deaeration
  • pH Conditioning
  • Oxygen-Scavenger Dosing
  • Feed-Water Storage
  • Conductivity Monitoring
  • Automated Controls

The final treatment configuration is selected according to the actual boiler-feed specification, not a standard equipment package.

How It Works - From Raw Water to Boiler-Ready Feed Water
Water & Boiler Assessment

Hydroxy evaluates source-water quality, boiler pressure, steam demand and condensate-return conditions.

Pre-Treatment

Suspended matter, chlorine, hardness and other contaminants are reduced as required.

High-Purity Treatment

Where necessary, RO, DM or polishing treatment is applied to reduce dissolved minerals and conductivity.

Deaeration & Conditioning

Dissolved gases and remaining chemical-treatment requirements are controlled before the water enters the boiler.

Feed-Water Storage & Supply

Treated water is stored and supplied to the boiler feed system according to operating demand.

Monitoring & Optimisation

Conductivity, hardness and other relevant parameters are monitored to maintain feed-water quality.

Why Feed-Water Quality Matters - "Better Water Protects the Boiler"
Scale Control

Hardness and mineral reduction help minimise deposits on boiler and heat-transfer surfaces.

Corrosion Control

Reducing dissolved oxygen and maintaining appropriate water chemistry helps protect internal boiler surfaces and piping.

Improved Heat Transfer

Cleaner heat-transfer surfaces support more efficient transfer of energy into the water.

Reduced Blowdown

Better-quality feed water can reduce the rate at which dissolved contaminants accumulate inside the boiler, supporting more efficient water management.

Improved Equipment Life

Controlling scale, deposits and corrosion helps protect boilers, valves, pumps and steam-system components.

Condensate Return & Make-Up Water - Treat the Complete Boiler Water Balance

Boiler systems often combine returned condensate with newly treated make-up water. The amount and quality of condensate returned directly influence:

Hydroxy considers the complete water balance when sizing and configuring the feed-water treatment system. The objective is not simply to treat incoming water—it is to optimise the water feeding the complete steam system.

Typical Applications

Mixed Bed Deionizers are suitable where very low ionic contamination and high-purity water are required, including:

Mixed-bed ion exchange is used across industrial demineralization, polishing and ultrapure-water applications.

Monitoring & Automation - Protect Final Water Quality

Depending on the application, Hydroxy can integrate:

Automation helps maintain more consistent feed-water quality and provides operators with clearer visibility into system performance.

Why Hydroxy? - Boiler Feed Water Treatment Begins With the Boiler

There is no single treatment configuration suitable for every boiler. A low-pressure boiler and a high-pressure steam system can require very different feed-water quality. Hydroxy therefore designs the treatment system around:

Water Chemistry + Boiler Pressure + Steam Demand + Condensate Return + Required Feed-Water Quality This approach helps avoid both under-treatment, which can damage equipment, and unnecessary over-treatment, which increases capital and operating costs.

Our engineering approach starts with one essential question: "What water quality does your boiler actually require?"

Key Benifits
Scale Prevention

Reduces hardness and mineral contaminants that can form deposits on boiler surfaces.

Corrosion Protection

Appropriate feed-water conditioning helps reduce conditions that contribute to boiler and piping corrosion.

Improved Boiler Efficiency

Cleaner heat-transfer surfaces can support more efficient boiler operation.

Reduced Blowdown & Water Loss

Higher-quality feed water can support better control of dissolved contaminants within the boiler system.

Improved Steam-System Reliability

Consistent feed-water quality helps protect boilers and associated steam-system equipment.

Custom Treatment Configuration

Hydroxy selects the treatment process according to source-water quality, boiler pressure, required capacity and feed-water specification.

Boiler Feed Water Is Application-Specific High-Purity Water

The objective is not simply to produce the lowest possible TDS. The correct treatment level depends on the boiler design and operating conditions. Treat the water to the quality the boiler requires—no less, and no more than necessary.