Safe Chemical Solutions Since 1942






Rydlyme Container Sizes


RYDLYME is available in various sizes:
Tanker or other bulk sizes available upon request.
  • 1-gallon
  • 4-gallon Case (1 gal. container x 4)
  • 5-gallon Jug
  • 30-gallon Drum
  • 55-gallon Drum
  • 330-gallon Tote

Heat Exchanger Cleaning with RYDLYME Descaler

Cleaning a heat exchanger is essential in keeping the exchanger efficient and running well. If maintenance is neglected, a heat exchanger will develop mineral or calcium deposits along the plate and frame or shell and tube walls. This build up will lead to inefficiency, which increases energy costs and reduces heat/cooling exchange.

Heat exchangers can be found in numerous places and in almost every field including:

  • Petrochemical
  • Pulp & paper
  • Sugar industry
  • Marine industry (Please see
  • Steel industry
  • Power generation
  • And so much more!

If the heat exchanger is not cleaned, build up of minerals will occur. These mineral deposits are formed from:

  • Operating hours
  • Feed water hardness
  • Exchanger treatment methods
  • Water control fluctuations

Heat Exchanger System Volume


Heat Exchanger Cleaning Chemical


The use of RYDLYME does not require special safety equipment or procedures because it is a non-hazardous and non-toxic descaler! There are no toxic fumes and you can even HOLD IT IN YOUR OPEN HAND WITHOUT INJURY! CLICK HERE to see proof! There are NO restrictions, special licenses or permits needed to transport or handle RYDLYME! Review Section 14 Transportation Information of each product's SDS to learn about restrictions.

What does this mean to you?

The safeness of RYDLYME quells any health and safety concerns when it comes to handling and transporting the product. You will have a much easier time introducing RYDLYME into any number of heat exchangers than with hazardous chemical descalers because there is no need for special hazmat equipment (e.g. respirator, suits), elevated temperatures or procedures (e.g. permits, special handling). Review Section 8 Exposure Controls/Personal Protection of each product's SDS to learn about protection.

Unlike other descalers, RYDLYME is 100% biodegradable WITHOUT neutralization! RYDLYME is certified by an EPA-approved testing facility as 100% biodegradable and environmentally non-hazardous at full concentration/as-received form. This means even at full concentration, RYDLYME is not only safe to handle, but also does not have a detrimental effect to the environment.

For example, an accidental spill at a facility with a container of RYDLYME does not necessitate special hazmat containment and disposal procedures, or even pose a safety or health concern to personnel or equipment. It can be safely disposed down a normal plant sewer or drain, followed by a thorough water flush and clean up is done. The same cannot be said about other descalers. Review Sections 12-13 Ecological Information and Disposal Considerations of each product's SDS to learn about biodegradability, environmental concerns and disposal.

Why use RYDLYME when cleaning a heat exchanger?

RYDLYME is the perfect tool for dissolving these deposits that rob efficiency and dramatically increase your fuel consumption. An annual RYDLYME cleaning will dissolve the calcium, magnesium, rust, and other deposits into solution without harming the metallurgy or components within your heat exchanger. RYDLYME is non-hazardous to the personnel who perform the cleaning and disposal is simple upon completion of the cleaning; as RYDLYME is biodegradable.

Heat Exchanger Cleaning Before and After

Heat exchanger cleaning before and after using RYDLYME.

Our biodegradable and innovative descaler, RYDLYME, is the universal product of choice for heat exchanger scale removal. Besides avoiding heat exchanger failures, with RYDLYME you regain original design heat output, efficiency, and reliability! 

Heat Exchanger Cleaning Methods

There are a few ways you can clean a heat exchanger, but using RYDLYME biodegradable descaler is proven to be faster and much more effective on heat exchangers. Brushing and rodding takes more time and manpower when cleaning a heat exchanger, and mineral deposits are often left over from areas that the cleaning crew is unable to reach. As RYDLYME is a liquid, it will be able to reach crevices that traditional brushing and rodding just can’t reach!

Heat Exchanger Cleaning Equipment

When cleaning a heat exchanger, you will need:

  • RYDLYME descaler (quantity will depend on size of heat exchanger)
  • Pump to circulate descaler
  • Various hoses and fittings to complete a circulation

These are the essentials need to complete a cleaning circulation for your heat exchanger. Please call for more detailed information, or see the basic procedure below.

Heat Exchanger Cleaning Procedure:

  1. Isolate and drain the water-side of the exchanger to be cleaned.
  2. Place a 1'' ball valve between the isolation valves and the heat exchanger on both the supply and return.
  3. Attach the RYDLYME pump and hoses so the RYDLYME will be pumped in the bottom or supply, and back out the top or return.
  4. Begin pumping all the required RYDLYME into the exchanger. Once that is accomplished, begin to add water to complete the circulation. Please note: The calcium deposit will take up volume within the heat exchanger, so you will not be able to add the same amount of water in the beginning.
  5. Continue circulating the solution for the recommended amount of time. As the circulation progresses and the product dissolves the deposits inside the unit, the volume will increase. To account for the increase in volume, please add water to the circulation vessel, as needed. If you begin adding a lot of water, please be aware, it is possible there is a leak in the system.
  6. It is a good idea to periodically check the effectiveness of the solution while circulation is in progress. This can be accomplished by utilizing a pH meter and as long as the solution retains a low pH, the product is active. Should the circulatiing solution reach a pH of 5.5 to 7.0 before the recommended time is up, you will need to add more RYDLYME and possibly extend the circulation time..
  7. Upon completion of the recommended circulation time, the solution may be purged to a normal sewer and flushed with water. This process is completed by placing the return hose in the drain and adding water to the circulation container until the discharge line runs clear.
  8. The unit is ready to be returned to service.
  9. The same instructions may be used for plate and frame type heat exchangers. For volumes, please follow the noted formula.

Please note: If your situation dictates that you cannot take your heat exchanger off-line, please contact the manufacturer for on-line cleaning instructions.

For more detailed instructions, call Apex Engineering Products today for a free quote at 630-820-8888 or download our heat exchanger cleaning brochure here!

Shell and tube heat exchanger cleaning


  • Safe for personnel!

  • Safe for the environment!

  • Safe for the equipment!

  • Dissolve the toughest mineral deposits!

  • Fast, convenient, effective!



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Apex Engineering Products Corporation  |  1241 Shoreline Drive  |  Aurora, IL 60504  |  Tel: 800.451-6291 or 1.630.820.8888  |  Fax: 630.820.8886  |  Made in the U.S.A.

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