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VacOil® DP Grade 704 Diffusion Pump Oil - 500 cc/ml

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Product Description

VacOil® DP Grade 704 is is a silicone based diffusion pump fluid that is an excellent substitute for the discontinued Dow Corning DC-704. Its quality formula improves pumping cycles, lowers maintenance costs, cools pumps, and extends fluid life.


  • Vapor Pressure: Max. 6.65 x 10-8 Torr
  • Viscosity @ 25°C: 36 ± 4cs
  • Flash Point: 210°C
  • Condensation Point: ≥-35°C
  • Specific Gravity: 1.050  1.080


  • Performs well in tough, rugged applications
  • Quick pump-down, even after exposure to air at high temperatures
  • Thermally and chemically stable
  • Keeps pump jets free of tars and hard carbon
  • Outlasts and outperforms competitive brands


  • Analytical Instrumentation
  • Leak detection
  • Freeze drying
  • Mass spectrometry
  • Sputtering
  • General laboratory applications

Vacuum Pump Compatibility

  • Diffusion pumps

Brand Equivalents

  • DC-704
  • Invoil 704
  • CMP 704
  • IVP 704
  • KJLC 0704
  • TMC-704

VacOil vacuum fluids are superior quality molecularly distilled vacuum pump oils engineered to perform and provide the ultimate protection from wear that causes pump repairs and pump failures. Lab tests reveal superior performance such as viscosity change and sediment weight when tested against competitive brand oils, outlasting and outperforming other vacuum oils.

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