Truegard AW 46 Hydraulic oil Zinc free SYN 55 GALLON DRUM

AW 46 refers to an ISO VG 46 anti-wear hydraulic oil with a mid-range viscosity well-suited for high-pressure industrial hydraulic systems operating under moderate to heavy loads. The "46" designation indicates the oil's kinematic viscosity in centistokes at 40°C, making it a common standard for industrial machinery, presses, and similar equipment where OEM specifications call for an ISO VG 46 fluid.

Conventional hydraulic oils often rely on zinc-based anti-wear additives (ZDDP), which can be harmful in environmentally sensitive areas and may not satisfy the requirements of equipment with certain specialized certifications. This zinc-free ashless formula reduces the risk of metal corrosion and is designed for operations in environmentally sensitive areas or wherever zinc compounds are restricted.

The synthetic base oil delivers superior thermal and oxidative stability, maintaining viscosity and a protective film across a wider temperature range than conventional mineral oils. This means more consistent performance during cold start-ups and in high-heat operating environments, along with potentially extended drain intervals in demanding industrial applications.

Mixing lubricants from different formulations — particularly synthetics with mineral oils, or ashless products with zinc-based ones — can compromise additive performance and fluid integrity. Best practice is to fully flush the system of any existing fluid before switching to this synthetic, zinc-free formula to avoid contamination and ensure optimal performance. Compatibility with a specific fluid already in a system is not confirmed for this product; verify with the manufacturer if needed.

This oil is engineered for advanced industrial hydraulic systems, particularly those operating under high pressure where anti-wear protection is critical. Its zinc-free, ashless chemistry also makes it well-suited for operations in environmentally sensitive areas or facilities where equipment specifications prohibit zinc-containing additives.