Brazed PHE Alfa Laval CB110 16l 20l 24l 30m 38h 46h 46l 54m 76h 90h 110h

Brazed Plate Heat Exchanger Chiller Replacemnet	Nickel Brazed Plate Heat Exchanger
Keyword	Alfa Laval Nickel Brazed Heat Exchanger
Plate Number	10 – 240
Thickness A (mm)	15 + 2.56 x n (e.g., 30 plates: 91.8 mm / 110 plates: 296.6 mm)
Dimension LWH (mm)	(15 + 2.56 x n) x 191 x 616
Center Distance (mm)	Vertical: 519 / Horizontal: 92
Weight (kg)	4.82 + 0.35 x n (e.g., 30 plates: 15.32 kg / 110 plates: 43.32 kg)
Volume (L) Q1Q2 Side / Q3Q4 Side	Channel volume: 0.21 L (Total: approx. 0.21 x n/2 per side)
Designed Pressure	26 – 30 bar (Depending on pressure vessel standards)
Designed Temperature	-196°C ~ +225°C
Plate Materials	Stainless Steel 316L / Copper Brazing
Capacity	50 kW - 900 kW (Max flow rate: 51 m³/h)

Alfa Laval CB110 Maintenance & Service Guide

The Alfa Laval CB110 brazed plate heat exchanger is designed for long-term operation with relatively low maintenance requirements. Since the unit uses a fully brazed construction, there are no gaskets to replace during normal service. In most HVAC, hydronic heating, and industrial cooling systems, maintenance mainly focuses on monitoring operating conditions, controlling water quality, and cleaning the unit when performance begins to decline.

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Routine Operational Checks

Monitor Pressure Drop and Temperature Performance

Regularly check the inlet and outlet temperatures as well as the pressure differential across the CB110. A gradual increase in pressure drop or reduced heat transfer efficiency usually indicates internal fouling, scaling, or partial blockage inside the plate channels.

In practical operation, many technicians prefer to schedule cleaning based on actual performance data rather than fixed maintenance intervals. This helps reduce unnecessary downtime while keeping the system operating efficiently.

Inspect Connections and External Components

During routine inspections, check:

• Pipe connections
• Threaded fittings and flanges
• Valves and support brackets
• External corrosion or rust marks
• Small leaks or seepage around connections

Loose fittings, vibration wear, or minor leakage should be addressed early to avoid damage to nearby pipework or insulation.

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System Level Maintenance

Water Quality Control

For closed-loop heating and cooling systems, stable water quality is one of the most important factors affecting CB110 service life. Poor water conditions can lead to internal scaling, corrosion, and reduced thermal performance over time.

Key parameters to monitor include:

• Water hardness
• pH value
• Chloride content
• Suspended solids

Water treatment filters and bypass filters should also be cleaned or replaced according to the system maintenance schedule.

Open Systems and Cooling Tower Maintenance

For cooling tower or open-loop systems, contamination from the system side is often the main cause of fouling inside the heat exchanger.

Routine maintenance may include:

• Cleaning cooling tower fill media
• Removing sludge and biological buildup
• Controlling algae and bacterial growth

Keeping the circulating water clean is usually far more cost-effective than dealing with severe internal fouling later.

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When to Clean or Service the CB110

Performance-Based Indicators

Chemical cleaning is generally recommended when:

• Pressure drop rises about 20–30% above the original operating value
• Outlet temperature can no longer meet design conditions
• Heat transfer efficiency drops noticeably

In real applications, these operating changes are often more useful than relying only on calendar-based service intervals.

Chemical Cleaning

Chemical circulation cleaning is the standard cleaning method for the CB110. Cleaning agents must be compatible with both 316L stainless steel plates and copper brazing material.

Using overly aggressive chemicals may damage the brazing joints or accelerate internal corrosion, especially in older units.

Physical Blockage

If severe blockage occurs, backflushing may help remove loose debris or sediment. However, the CB110 is a non-dismantlable brazed plate heat exchanger, so internal mechanical disassembly is generally not recommended outside of factory or certified service conditions.

Attempting to force open the brazed structure will permanently damage the unit.

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Long-Term Operating Recommendations

Invest in Water Quality First

In long-term operation, proper water treatment usually extends service life more effectively than frequent cleaning.

Common recommendations include:

• Closed-loop circulation design
• Corrosion inhibitor dosing
• Softened or deionized water where required

These measures help reduce scaling and internal corrosion inside the plate channels.

Install Pressure and Temperature Instrumentation

Installing pressure gauges and temperature sensors at both inlet and outlet connections makes it easier to monitor long-term operating trends.

This allows maintenance teams to:

• Detect fouling early
• Compare operating performance over time
• Schedule cleaning before major efficiency loss occurs
• Reduce unexpected downtime

For most CB110 systems, regular monitoring and stable water quality are the most effective ways to maintain reliable long-term heat exchanger performance.

Direct Contact Channels:

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