Sale Skydrol LD-4

Materials Compatibility

Materials used in the hydraulic system and surrounding it must be compatible with the hydraulic fluid. The fluid must not degrade their performance; neither should the materials degrade the fluid. The materials and components used in and near any aircraft hydraulic system are carefully selected by the airframe manufacturer. The aircraft industry uses many synthetic materials – many are resistant to Skydrol fluids and some are not. Many that are not totally resistant require long exposure before damage results.Deviations from the recommended materials should not be made without prior consultation with the airframe manufacturer and the materials components suppliers. The table below contains the general rating of compatibility of various materials with Skydrol fluids.

General Guidelines for Compatibility of Aviation
Phosphate Ester Hydraulic Fluids with Various Materials*

Ratings of Compatibility
EXCELLENT RESISTANCE – Material may be used in constant contact with the fluid.
GOOD RESISTANCE –Withstands exposure to the fluid with minimum swell (for plastics and rubber) or loss of integrity.
POOR RESISTANCE – Should not be used near the fluid.
NO RESISTANCE – Disintegrates in the fluid.

product
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 Excellent  Good  Poor  No
 Fabrics
 Acrylic (Acrilan,R Creslan,R OrlonR) *
 Cotton, Wool, Rayon *
 Fiberglass, Nylon, Polyester (Dacron,R FortrelR) *
 Carbon (Graphite) *
 Coated Fabrics
 Buna N-coated Cotton or Nylon *
 Butyl-coated Nylon *
 Ethylene Propylene-coated Nylon *
 Chlorosulfonated Polyethylene Nylon *
 Neoprene-coated Nylon, Cotton, Polyester *
 Silicone-coated Fiberglass *
 Silicone-coated Polyester *
 Vinyl-coated Cotton, Nylon, Polyester *
 Vinyl-coated Fiberglass *
 Fluoroelastomer-coated Nylon *
 Metals
 Aluminum *
 Brass *
 Bronze *
 Metals (continued)
 Cadmium *
 Chromium *
 Copper1 *
 Ferrous *
 Lead2 *
 Magnesium1 *
 Noble (Gold, Silver) *
 Stainless Steel *
 Zinc2 *
 Titanium3 *
 Exotic (Hastelloy, etc.) *
 Beryllium Copper *
 Conversion Coatings
 Anodizing (Aluminum) *
 Dow 7 and 17 (Magnesium) *
 Paint Finishes
 Alkyd4 *
 Acrylic *
 Asphaltic *
 Cellulosic Lacquer *
 Epoxy *
 Epoxy-Amide *
 Heat-resistant Aluminized *
 Latex *
 Polyurethane *
 Linseed Oil *
 Shellac *
 Silicone *
 Urethane *
 Varnish *
 Vinyl *
 Thermoplastics
 ABS *
 Acetal *
 Acrylic *
 Cellulosic *
 ETFE Copolymer (TefzelR) *
 FEP (Fluorocarbon) *
 Nylon *
 Polycarbonate (LexanR) *
 Polyetheretherketone (PEEK) *
 Polyetherketone (PEK) *
 Polyethylene *
 Polyphenylene Oxide (PPO) *
 Polyphenylene Sulfide (PPS) *
 Polypropylene *
 Polystyrene *
 Polyvinyl Chloride *
 Polyvinylidene Chloride *
 Thermoplastics (cont.)
 Polyvinyl Fluoride (PVF) (TedlarR) *
 Reinforced TFE *
 TFE (Fluorocarbon) *
 Thermosets
 Melamine *
 Polyester *
 Phenolic *
 Polyamide *
 Polyimide *
 Elastomers
 Butadiene Acrylonitrile (Buna N) *
 Chlorosulfonated Polyethylene (HypalonR) *
 Epichlorohydrin *
 Ethylene Propylene (EPR, EPDM) *
 Fluorinated Hydrocarbon (Viton,R FluorelR) *
 Polyacrylic *
 Polybutadiene *
 Polychloroprene (Neoprene) *
 Polyisoprene (Natural & Synthetic Rubber) *
 Polysulfide *
 Polyurethane *
 Isobutylene Isoprene (Butyl) *
 Silicone *
 Styrene Butadiene (Buna S) *
 PerfluoroHydrocarbon (Kalrez,R ChemrazR) *
 Fluoroethylene (TFE, FEP) *
 Misc. Materials
 Cork *
 Leather *
 Vinyl Floor Tile *

 Download MSDS SkyDrol LD-4
 Product Highlight Skydrol / SkyKleen / MCS 352B
 Technical Bulletin
* Materials Compatibility
* Fluid In-Service Quality Limits
* Shelf Life, Storage and Handling
* Safety and Emergency Procedures
* Fluid Performance
* Permeation Testing
* Factors Affecting Glove Selection Permeation
* Heaiht & Safety

Skydrol® fire resistant hydraulic fluids may cause intense pain on exposure to the eye and its associated membranes. Despite the pain they may cause, toxicological testing and our experience both indicate that Skydrol fluids do not damage the eye.

Skydrol LD-4

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