ADDITIVES DEPLETE FIRST
The additive package is what makes the
product an engineered lubricant. It is also the component that depletes first under heat.
Food-grade lubricants are specified for storage at 0–40 °C. A store room in a 40–45 °C plant exceeds it.
Food-grade lubricants are typically specified for storage between 0 and 40 °C. Fuchs Cassida carries that specification.
A store room in a plant with 40–45 °C ambient exceeds that range for much of the year. Oxidation accelerates with temperature and the additive package depletes, so the charge entering the machine has already lost service life.
| Item | Figure |
|---|---|
| Fuchs Cassida, storage temperature | 0–40 °C |
| Plant ambient | 40–45 °C |
| Unventilated store room at that ambient | Higher |
Source: Fuchs Cassida product documentation (storage). Plant ambient: site condition.
The storage specification appears on a data sheet that is rarely issued to the stores function. The condition is common and it is not usually the result of a maintenance decision.
Oxidation is a chemical reaction and accelerates with temperature. The base oil oxidises, the additive package depletes, and in humid conditions water enters the drum through the daily thermal cycle.
An NSF H1 registration attaches to a formulation. A heat-degraded charge of that formulation is no longer performing as the certified product.
An oil analysis on a sample from a drum held six months in the store will establish whether the oil in stock is performing to specification, and whether a short oil interval originates at the pump or at the shelf.
The R5 instruction manual recommends the same discipline for the operating charge: where there is no established experience of oil life under the prevailing conditions, carry out an oil analysis every 500 operating hours and set the change interval from the result.
Source: Busch R5 instruction manual.
The oil looks identical when you pour it. It is not the same oil.
| Figure | Value | Source |
|---|---|---|
| Fuchs Cassida, storage | 0–40 °C | Fuchs Cassida product documentation |
| Plant ambient | 40–45 °C | Site condition |
| Busch remedy where conditions are unknown | Oil analysis every 500 hrs; set interval from the result | Busch R5 instruction manual |
| Service life lost in storage | NOT QUANTIFIABLE from a published table | Established by oil analysis. |
The temperature reached by a specific store room has not been established. It is measured rather than estimated, and the measurement is the first action on the list above.
No published table converts hours above 40 °C into remaining service life. The result depends on the formulation, the packaging, the humidity and the thermal cycle. An oil analysis establishes it directly.
Typically 0 to 40 °C. Fuchs Cassida carries that specification. A store room in a plant with 40–45 °C ambient will exceed it, particularly where the room is unventilated or has a sun-facing wall.
Yes. Oxidation accelerates with temperature, the additive package depletes, and in humid conditions water enters the drum through the daily thermal cycle. The oil appears unchanged when decanted; the reduction is in service life.
By oil analysis. One sample from a drum held six months answers the question. The R5 manual recommends an oil analysis every 500 operating hours where there is no established experience of oil life under the prevailing conditions.
Parts: Lubricants & oils · Vacuum pumps
Bilingual Arabic/English. Symptom index, published intervals, the elastomer question, and what one pump consumes in a year. Printable. Free. Ask and we will send it.