May12026

Sealing Costs in CAPEX/OPEX and their Impact on the Total Cost of Ownership (TCO) in a Brewery

In modern production, precise planning and effective cost management are essential for competitiveness. In this context, considering sealing costs in the categories of CAPEX (Capital Expenditures) and OPEX (Operational Expenditures) is of great importance. In the brewing industry, seals for tanks, pipes, and other equipment are indispensable as they guarantee product quality and safety. This article explains what CAPEX and OPEX mean in the context of seals and introduces the TCO formula. The relevance of these concepts is illustrated using a numerical example from a brewery.

1. Cost Structure: CAPEX and OPEX

CAPEX refers to investments in long-term assets, while OPEX covers ongoing operating costs. In the context of seals, these cost implications are structured as follows:

  • CAPEX:

  • Acquisition costs of seals: These costs are incurred once when the seals are purchased. High-quality seals can result in higher initial costs.

  • Installation costs: These include the costs for installing and integrating the seals into existing systems.

  • OPEX:

  • Maintenance costs: Regular maintenance and inspection of seals are necessary to maximize their lifespan.

  • Spare part costs: If seals are damaged or worn, costs for spare parts and their installation will be incurred.

  • Downtime costs: When seals need to be replaced, downtime can occur, causing additional costs.

2. TCO Formula (Total Cost of Ownership)

The TCO formula for calculating the total costs over the lifespan of a machine or system is:

[ text{TCO} = text{CAPEX} + sum Delta text{OEE} cdot text{Stundenwert} ]

Here, ΔOEE stands for the change in Overall Equipment Effectiveness, which can result from the replacement of seals or maintenance measures. The hourly value is the determined value for the production hours lost due to downtime or inefficient production.

3. Numerical Example from a Brewery

Let’s take an exemplary brewery that produces approximately 50,000 hectoliters of beer annually and has an hourly value of 1,000 Euros per produced production hour.

Assumptions:

  • CAPEX:

  • Acquisition costs of seals: 10,000 Euros

  • Installation costs: 2,000 Euros

  • Total CAPEX: 12,000 Euros

  • OPEX (annually):

  • Maintenance costs: 5,000 Euros

  • Spare part costs for seals: 3,000 Euros

  • Downtime (due to seal replacement): 40 hours, causing a loss of 40,000 Euros (40 hours * 1,000 Euros).

Calculation of TCO:

The annual OPEX is calculated as follows:

[ text{OPEX (jährlich)} = 5.000 text{ Euro (Wartung)} + 3.000 text{ Euro (Ersatzteile)} + 40.000 text{ Euro (Stillstände)} = 48.000 text{ Euro} ]

The TCO for one year would therefore be:

[ text{TCO} = 12.000 text{ Euro (CAPEX)} + 48.000 text{ Euro (OPEX)} = 60.000 text{ Euro} ]

4. Decision Matrix: Costs and Failure Risk

To make an informed decision regarding seals, a decision matrix can be helpful. This matrix considers both the costs and the risk of plant downtime that can be caused by seals.

| Decision | Costs (Euro) | Failure Risk (1-5) | Weighted Costs (Costs * Risk) | |———————-|—————|———————-|————————————-| | Standard Seals | 60.000 | 3 | 180.000 | | High-Quality Seals | 90.000 | 1 | 90.000 | | Modular Seals | 75.000 | 2 | 150.000 |

In this matrix, various option combinations can be evaluated. The weighted costs provide an idea of how profitable an investment is compared to its risk. High-quality seals have higher initial costs but significantly minimize the risk of failure.

Conclusion

The analysis of sealing costs in CAPEX and OPEX is essential for economic planning in a brewery. The TCO formula allows for a comprehensive consideration of costs over the entire lifespan and supports decision-making. The decision matrix can be used to identify the ideal price-performance ratio to make the production process more effective and cost-efficient. Alternative materials or designs can unlock additional savings potential, which can ultimately contribute to increasing the brewery’s profitability.

FAQ

How much more expensive is silicone compound compared to EPDM?

Standard silicone compounds are typically 2 to 3 times the price of EPDM compound. High-temperature, pharmaceutical, or food-grade silicone compounds are 3 to 5 times the price of standard EPDM.

How does lifespan affect TCO?

In continuous operation at +180 °C, silicone lasts approximately 3 times longer than EPDM. At +200 °C, EPDM cannot be used at all. Over the entire lifespan, the hourly cost of silicone often falls below that of EPDM.

Which factors belong in a TCO analysis for seals?

Compound acquisition price, tooling costs, lifespan-related replacement frequency, maintenance effort, downtime costs in case of failure, complaint risk, and compliance costs (BfR XV, FDA, USP Class VI).

When does the higher silicone price pay off?

For applications above +130 °C, in CIP/SIP lines, in food or pharma-regulated environments, and for series with long maintenance intervals, silicone is economically superior despite its higher unit price.