CAMCO 4628 SERIES Ammonia Refrigeration Oils With Patented Seal Conditioners

Product Description

CAMCO® 4628-68 SC, CAMCO® 4628-100 SC, CAMCO® 4628-150 SC

A 100% synthetic hydrocarbon based lubricant including specially designed additives to: protect against corrosion, oxidation, and thermal breakdown; provide seal swell (patented); improve coalescing; and prevent foaming. Used for applications where the lubricant is subjected to certain harsh chemical environments. Major benefits in ammonia applications: pumps, compressor, and refrigeration. This product series has excellent stability with hydrogen, carbon monoxide, and carbon dioxide. This product is 100% synthetic based and unlike competitive products that do not contain any mineral oils such as Group II, Group III, or GTL that may result in waxy build up. The result is also improved lubricant film thickness.


  • Very low pour point and excellent low temperature fluidity
  • Low volatility—base fluids selected for very low volatility combined with a proprietary anti-misting additive; shown to improve system efficiency through improved oil separation resulting is less fouling of evaporators
  • Low ammonia solubility—carefully formulated to improve system efficiency and reduce wear and limit oil consumption
  • Excellent thermal, oxidation and hydrolytic stability provides cleaner operation, protects equipment, and provides longer service life with improved system efficiency
  • Excellent natural viscosity—temperature characteristics for improved system efficiency and lubrication
  • Superior lubricant film strength reduces energy requirements, maintenance costs and extends equipment life
  • Shear stable—designed to provide extended life with consistent viscosity performance


  • Lubricant & coolant for ammonia refrigeration compressor applications
  • Especially effective in promoting long life in ammonia compressors and combating corrosion
  • Used in selected hydrogen, CO, and CO2 compressor applications and with certain light hydrocarbon gasses
  • Lubricant & coolant for selected process and gas compressors; typical applications include light hydrocarbons and natural gas compressors

Typical Properties

  4628-68 SC 4628-100 SC 4628-150 SC
Viscosity @ 40°C cSt ASTM D44560.097.0148.1
Viscosity @ 100 0C, cSt9.8813.718.97
Viscosity @ 1000 F, SUS304.9536.2768.7
Viscosity @ 2100 F, SUS56.776.896.3
Viscosity Index, ASTM D2270151143145
Density, lb. Gal, OO F, ASTM D40526.967.017.01
Pour Point O F CC), ASTM D97-65 (-54)-54 (-48)-49 (-45)
Flash Point, C.O.C., O F CC), ASTM D92486 (252)500 (260)510 (266)
Fire Point, C.O.C., O F CC), ASTM D92540 (282)585 (307)540 (282)
Specific Gravity, ASTM D40520.8310.8380.841

**These values are not intended for use in preparing specifications.**