The life expectancy of one oil filling in a hydraulic or lubricating unit has decreased significantly over the last several years as machines run harder and longer production cycles. The life expectancy of an oiling filling depends on maintenance programs in order to avoid degradation or “varnish.” Varnish will build up at an exponential rate, resulting in hot spots and prematurely plugged components, rendering them inefficient.
HYDAC’s new Varnish Elimination Unit, VEU, removes oil-aging products from mineral oil to extend oil and component lifetime. The VEU contains an OLF45 of OLF60, which filters the oil down to 2 microns. The VEU has an option for an air-cooled unit or water-cooled unit, as the cooled oil makes the soluble varnish a solid contaminate that can be filtered out. The VEU runs offline on the hydraulic reservoir, constantly running and removing varnish. This also allows for filter element maintenance without disrupting production. This bypass method is more efficient than utilizing ion exchangers, which require complex oil analysis.
Varnish Elimination Unit Features
- Removes soil and gel-like oil aging products
- Fewer deposits in hydraulic valves result in increased operating reliability
- Improved oil service life
- Available for new and existing systems
Varnish Elimination Unit Technical Specifications
| Series | VEU-A-… | VEU-W-… |
|---|---|---|
| Flow rate | VEU-x-10-… = 10gpm VEU-x-15-… = 15gpm | |
| Permissible fluid viscosity range | 75 to 2000 SUS | |
| Permitted operating fluids | Mineral-based | |
| Fluid Service Temperature | 32 to 140°F | 32 to 176°F |
| Maximum pump operating pressure | 87 psi | |
| Maximum ΔP across filter elements | 72.5 psi | |
| Permissible inlet pressure range | -5.8 to 7 psi | |
| INLET port connection | VEU-x-10-… = 1-5/8 x 12UN – Male VEU-x-15-… = 1-7/8-12UN – Male | |
| OUTLET port connection | 1-5/16 x 12UN – Male | |
| Water INLET port connection (VEUW-…only) | 1-1/2 x NPT – Male | |
| Water OUTLET port connection (VEUW-…only) | 1-1/2 x NPT – Male | |
| Supply voltage | 460V AC / 60Hz / 3 Ph. 575V AC / 60Hz / 3 Ph. | |
| Seal material | FKM (Viton®) | |
| Permissible ambient temperature range | 32 to 104°F | |
| Permissible storage temperature range | 0 to 140°F | |
| Permissible relative humidity | 0 to 80%, non-condensing | |
| Approximate weight (empty) | 1,100 lbs. | 1,150 lbs. |