Klüber Klüberfluid NH1 4-005

Klüber Klüberfluid NH1 4-005 Is a synthetic barrier fluid for mechanical seals

Your benefits at a glance

– No build-up of deposits if the product is used according to the intended purpose in mechanical seals due to the advanced synthetic oil formulation
– ISO 21469 certified – supports the compliance with the hygienic requirements in your production plant.

Your requirements – our solution

Klüberfluid NH1 4-005 is based on a synthetic hydrocarbon oil and was developed for the lubrication of mechanical seals operating under various conditions in the chemical and pharmaceutical industries.

Klüberfluid NH1 4-005 is NSF H1 registered and therefore in compliance with FDA 21 CFR § 178.3570. The lubricant was developed for incidental contact with products and packaging materials in the food-processing, cosmetics, pharmaceutical or animal feed industries. The use of Klüberfluid NH1 4-005 can contribute to increase reliability of your production processes. Nevertheless it is recommended to conduct an additional risk analysis, e.g. HACCP.


Klüberfluid NH1 4-005 can be used as a barrier fluid in mechanical seals operating under inert gas conditions. Mechanical seals have been used in mixers, driers, mills, kneaders, reactors and pumps in the chemical and the pharmaceutical industry for many years.

Klüber Lubrication offers a range of oils that were especially developed for use as a barrier medium in mechanical seals. The more the seal is stressed in terms of pressure, speed and heat, the lower should the oil’s viscosity be. For naturally circulating barrier fluids, the selected oil viscosity is normally approx. 5 mm²/s, as is the case with Klüberfluid NH1 4-005.

Which type of barrier fluid should be chosen depends on the type of seal elastomer as well as on the application’s process conditions.

For forced circulation, the oil should have a viscosity of 12 – 90 mm²/s. Klüber Lubrication offers solutions also for these cases.

Our experts will be pleased to provide advice.

Application notes

The recommendations of the mechanical seal manufacturer should be observed.

The stated service temperature range is based on an application under inert gas, as is normally the case with mechanical seals .


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