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FAQ#021 - Is the repressurizing hand pump for NATM pressure cells filled by de-aired oil, ready to use? Which kind of oil is used for this purpose?

Yes it is. The pump is filled at factory under vacuum with de-aired oil. For normal use within concrete the oil inside the pump is enough to repressurize 50 pcs. of NATM pressure cells. The oil we use is Edwards Ultra-grade 19 type for vacuum-pump use.