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Busch Cooling Liquid

Protect your vacuum pump. Maintain peak efficiency. With genuine cooling liquid from Busch.

cooling_liquid_cla_25

Busch CLA-25 is a specially formulated cooling liquid that keeps your vacuum pump running at optimal temperatures. It dissipates the heat generated by compression, friction, and mechanical movement, preventing overheating and protecting internal components from thermal stress.

Ideal for use in screw and rotary vane vacuum pumps, CLA-25 helps maintain stable operating conditions. The liquid also reduces wear and extends the service life of your equipment.

With freeze protection down to -25 °C and advanced Organic Additive Technology (OAT), CLA-25 provides superior corrosion resistance and thermal stability. OAT uses organic acids such as azelaic acid to protect against corrosion, to improve the longevity of the cooling liquid, and to ensure long-term reliability – keeping your vacuum pump running smoothly.

Why Busch genuine cooling liquid?

Optimized performance

  • Maintains optimal temperature of the vacuum pump, ensuring peak efficiency.
  • Prevents overheating, leading to reduced energy consumption.

Increased longevity

  • Protects critical components from excessive wear, corrosion, and thermal stress.
  • Reduces breakdowns and maintenance costs, resulting in a longer service life for your Busch vacuum pump.

Reduced downtime

  • Minimizes the risk of overheating and component failure, reducing unplanned downtime and costly repairs.
  • Ensures longer uptime and improved productivity.

Maintaining Optimal Performance

The Busch CLA-25 cooling liquid is essential for the reliable operation of your vacuum pumps. Effective cooling is key to maintaining performance, as excessive heat can cause components to expand, increase internal resistance, and damage seals – all of which reduce efficiency.

This is especially important in screw vacuum pumps, where the compression can increase internal temperatures. The cooling liquid keeps these temperatures stable, minimizes thermal expansion, and reduces stress on internal components. Thereby, it helps extend the lifespan of the pump and lowers the risk of unplanned downtime and maintenance.

Technical benefits of Busch cooling liquid

In certain industrial applications, the cooling liquid is needed not just for temperature control, but also to manage specific process requirements. For example, it can help neutralize or carry away contaminants from corrosive or reactive gases that would otherwise damage the vacuum pump.

While water is a readily available and cost-effective coolant, its limited temperature range – freezing below 0 °C and boiling above 100 °C – makes it unsuitable for more demanding environments. In contrast, specialized cooling liquids offer a wider operating range and protect metal components from corrosion, making them ideal for harsh or temperature-sensitive applications like steel degassing.

Busch cooling liquid for your vacuum pumps

Protect your vacuum pumps. Choose the right quantity of CLA-25 cooling liquid for your product.

Busch vacuum pumps
Quantity of CLA-25 (in liters)
COBRA NC 0100 B
4
 
 
COBRA NC 0200 B
4
 
 
COBRA NC 0300 B
4
 
 
COBRA NC 0400 B
7.6
9.2
9.6
COBRA NC 0500 B
7.6
9.2
 
COBRA NC 0600 C
11.6
15
 
COBRA NC 0950 A
18.8
25.6
 
COBRA NC 1000 B
17.6
 
 
COBRA NC 2500 B
18
 
 
COBRA NL 0400 B
9.2
 
 
COBRA NS 0070 C
1.6
 
 
COBRA NS 0160 C
1.6
 
 
COBRA NS 0600 C
12
 
 
COBRA NX 0450 A
12
14.8
37
COBRA NX 0650 A
18.8
25.6
 
COBRA NX 0950 A
18.8
25.6
 
COBRA NT 0100 B
4
 
 
COBRA NT 0300 B
4
 
 
HUCKEPACK HO 0429 F
15
 
 
HUCKEPACK HO 0433 F
16
 
 
HUCKEPACK HO 0437 F
37
 
 
HUCKEPACK HO 0441 F
43
 
 
Technical data
Monoethylene glycol
92 weight percent (wt.%)
 
 
Inhibitors + Water
approx. 8 weight percent (wt.-%)
 
 
Density at 20°C
1.113 g/ml
 
 
pH value
8.6
 
 
Viscosity at 20°C
3.19 mm²/s
 
 
Refractive index (20°C)
1.435
 
 
Freezing point
-25°C
 
 
Boiling point
107°C
 
 
Busch CLA-25 5L
2000241757
 
 
Busch CLA-25 20L
2000241738
 
 

FAQ

What is the role of the cooling liquid in a vacuum pump?

The cooling liquid helps dissipate the heat generated by compression, friction, and mechanical movement, preventing overheating and keeping the vacuum pump running efficiently. It also supports optimal performance and helps extend maintenance intervals by reducing thermal stress on internal components.

What makes cooling liquid from Busch so effective?

The Busch CLA-25 cooling liquid is a specially formulated cooling liquid based on monoethylene glycol and Organic Additive Technology (OAT). OAT uses organic acids to provide corrosion protection and improved thermal stability. This combination helps prevent freezing as well as overheating, and protects against corrosion and cavitation in the pump. By maintaining stable temperatures, CLA-25 optimizes pump efficiency and extends the lifetime of critical components.

Can I use any kind of cooling liquid for my vacuum pump?

We do not recommend using just any type of cooling liquid in your vacuum pump. Each pump has specific technical requirements, and some cooling liquids may not be compatible with its materials or performance needs. Always use the cooling liquid specified in the instruction manual.

Is it safe to use an equivalent cooling liquid?

Even if an alternative product appears similar, we cannot guarantee its compatibility or performance in our vacuum pumps. The behavior of untested cooling liquids is unpredictable and using them may affect pump performance or damage internal components. We strongly recommend using the genuine Busch cooling liquid listed in the instruction manual.

How often should I change the cooling liquid?

The replacement interval depends on several factors, including the application (e.g. level of process contamination), operating mode, machine condition, and environment. Refer to the instruction manual for general recommendations. If the cooling liquid changes color or the pump temperature rises noticeably, it is time to replace the liquid.

What happens if I do not change the cooling liquid as recommended?

Over time, degraded cooling liquid can reduce the performance of your vacuum pump, resulting in poorer ultimate pressure, longer pump-down times, and increased noise or vibration levels. In addition, wear and abrasion increase while corrosion protection decreases, shortening the service life of your vacuum pump.

How can I identify genuine Busch cooling liquid?

To ensure authenticity, always purchase from a Busch sales company or licensed distributor. Make sure that the tamper-evident closure and seal are intact. In addition, original cooling liquids from Busch have a batch tracking code and number. If you find a batch tracking code and number on your product and you are still not sure, forward the batch number to us for verification.

How do I change the cooling liquid of my vacuum pump?

Please refer to the specific instruction manual for your vacuum pump model. It contains detailed step-by-step instructions. Manuals can be downloaded from the product pages on our website. If needed, our global network of Busch service technicians will be happy to assist you. Just contact your nearest Busch service center LINK. ?incidence=servicerequest

Does cooling liquid have a shelf life?

Yes. When stored in original, sealed containers under proper conditions, Busch genuine cooling liquid has a shelf life of up to four years from the production date. Storage conditions should be:

  • Clean and dry location
  • Temperature between 0 and 40 °C
  • Humidity below 70% (no condensation)
  • Protected from direct sunlight (especially important for plastic containers)
  • Container kept hermetically sealed
  • Avoid introduction of foreign substances

Can I use Busch genuine cooling liquid in third-party vacuum pumps?

In principle, yes – you can benefit from Busch genuine cooling liquid even in third-party pumps. However, it should be selected based on the brand and specific application. Ideally, the pump should no longer be under warranty. Since Busch has no data on material compatibility or performance in third-party systems, we cannot provide a guarantee. Suitability must be verified through field testing.