Issue link: http://read.dmtmag.com/i/859318
Hydraulic Fluids Product Data castrol.com/GPS 800 255 4417 May 2025 GPS Castrol ® Anvol ® SWX 46 • Outstanding equipment performance – Extended pump and component life and reduction in replacement/maintenance costs. – Longer life. Compatibility with Seal Materials Castrol Anvol SWX fluids are compatible with Acrylonitrile-butadiene rubbers (NBR), hydrogenated NBR and fluoro-carbon rubbers (FKM). e Seal Compatibility Index (IP278) for Castrol Anvol SWX 46 is comparable to mineral oils. System Changeover Mineral Oil or Polyolester-based Fluids Castrol Anvol SWX 46 fluids are miscible and compatible with nearly all mineral oil and polyolester type hydraulic fluids. To convert a system using these types of fluids, simply drain and recharge with Castrol Anvol SWX 46. For proper fire resistance, at least 95% of the mineral oil-based fluid should be removed. See "Topping Up an Existing System" (below) for more detailed changeover information. Water Glycol and Emulsions Castrol Anvol SWX 46 fluids are not miscible or compatible with water-containing fluids and these fluids must be removed from the system. Remove most of the fluid by draining the reservoir and lines. Remove residual fluid by circulating Castrol Anvol SWX 46 and draining. Refill with fresh fluid. Repeat until residual fluid is less than 1% of the system volume. e lower the residual the better, as water can cause hydrolysis and acid increase/breakdown of the ester in Castrol Anvol SWX 46. Phosphate Ester Some but not all phosphate esters are compatible with Castrol Anvol SWX 46. Testing prior to conversion is recommended. Please contact Castrol for testing and conversion recommendations. Topping Up an Existing System If the two products to be mixed have been compatibility checked and are deemed compatible, then simply add fresh Castrol Anvol SWX 46 on top of the existing system. If, however, you are required by Factory Mutual to completely change out the system, we suggest the following: 1. Heat hydraulic system to operating temperature. 2. Drain the warm oil. 3. Change existing filters. 4. Flush with new fluid. Run all cylinders, if possible, to remove old fluid. Check the Castrol Anvol SWX 46 content of the system. If greater than 95%, go no further with flushing. 5. If Castrol Anvol SWX 46 is present at less then 95%, then drain the system again and fill with fresh Castrol Anvol SWX 46. 6. Take a sample aer one hour of running, if necessary, to check for Castrol Anvol SWX 46 levels. A fire point may need to be done to confirm Factory Mutual rating. C31 ecastrof