Knowledge

Published service figures,
and the conditions they assume.

Every figure in these articles is taken from a manufacturer's own document and attributed. Where no figure is published, the article records that no figure is published.

8 ARTICLESUPDATED 13 JULY 2026 EVERY FIGURE ATTRIBUTED
VACUUM PUMPS

Oil change intervals for oil-lubricated rotary vane pumps in hot, dusty service

Published: 500–2,000 hours under a clean, dry air stream below 100 °C. Continuous duty: approximately 1,000 hours.
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SEALS & ELASTOMERS

Elastomer selection for CIP circuits: the cure system

EPDM names a polymer family, not a compound. Peroxide-cured and sulphur-cured grades diverge above 120 °C.
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FILTRATION

Membrane life and cleaning chemistry in dairy ultrafiltration

Spiral elements run 1–3 years in dairy service. An enzymatic regime is documented to extend that to 4–5.
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LUBRICANTS

NSF H1 food-grade lubrication in dairy vacuum pumps

Whether H1 is required depends on the contact path between the pump and the product, which is a HACCP determination.
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PROCESS PUMPS

Hygienic twin-screw pumps: supersession and spare parts availability

The SLH-5G supersedes both the SLH-4G and the SLH-4U. No end-of-support date has been published.
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VACUUM PUMPS

Identifying vane wear in a rotary vane vacuum pump

Reduced ultimate vacuum, rising noise, oil misting and elevated running temperature, and the failure sequence behind them.
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LUBRICANTS

Lubricant storage temperature in high-ambient plants

Food-grade lubricants are specified for storage at 0–40 °C. A store room in a 40–45 °C plant exceeds it.
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HYGIENE & AUDIT

Colour-coded hygiene equipment and GFSI-benchmarked standards

BRCGS, FSSC 22000, IFS and SQF all expect zoned cleaning equipment. None of them publishes a colour chart.
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Also available — the full failure guide

A bilingual Arabic/English technical reference for your maintenance engineers. Symptom index, published intervals, the elastomer question, and what one pump consumes in a year. Printable. Free. Ask and we will send it.