HYDRAULIC OIL (PETROLEUM) Chemical Compatibility

Hydraulic Oil (Petroleum) is a mineral-oil based fluid with anti-wear, anti-foam and oxidation-inhibiting additives. It has a specific gravity of about 0.86 to 0.88 and a high flash point, often above 400°F (204°C). It transmits power in hydraulic presses, injection molding machines, mobile equipment and lifts. Bulk hydraulic oil and used oil tanks need secondary containment and protection from water and dirt. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.

At a glance

Nylon is the most economical tank material for Hydraulic Oil (Petroleum), rated Excellent. PVDF (Kynar®) is also rated Good or better. Avoid polypropylene tanks, polypropylene fittings and EPDM gaskets. Rated Fair (contact us before use): HDPE tanks and HDPE fittings.

  • Excellent No or minor effect. Recommended.
  • Good Slight effect. Generally suitable.
  • Fair Moderate effect. Limited or conditional use — contact us.
  • Not Recommended Severe effect. Do not use.
  • No Data Not tested. Contact us before use.

Tank Resins

How Hydraulic Oil (Petroleum) works with the plastics used to make our storage tanks.

Material Rating
HDPE Fair
Polypropylene Not Recommended
Nylon Excellent
PVDF (Kynar®) Excellent

Fittings

How Hydraulic Oil (Petroleum) works with the plastics used for tank fittings.

Material Rating
HDPE Fair
PVC Excellent
CPVC No Data
Polypropylene Not Recommended
PVDF Excellent

Gaskets & O-Rings

How Hydraulic Oil (Petroleum) works with gasket and O-ring materials.

Material Rating
Buna-N Excellent
EPDM Not Recommended
Viton® Excellent

Metals

How Hydraulic Oil (Petroleum) works with the metals used for fittings and bolts.

Material Rating
316 Stainless Steel Excellent
Hastelloy Excellent
Titanium No Data
Aluminum Excellent

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