Diffusion Pump Oil BL‑274 | High Vacuum Pump Fluid
BL‑274 Diffusion Pump Oil is a colorless, transparent, high‑performance oily liquid engineered for ultra‑high vacuum systems. It delivers superior oxidation resistance, ultra‑low saturated vapor pressure, excellent high‑vacuum performance, stable long‑term performance, and extended service life under continuous high‑temperature and high‑vacuum operating conditions.
Equivalent Brand
Direct replacement & fully compatible with:
DC 704, MT‑704, HIVAC‑F4 Diffusion Pump Oil
Technical Index
| Item | Standard |
|---|---|
| Viscosity, cSt (25℃) | 38±3 |
| Refractive index (25℃) | 1.5500 ~ 1.5600 |
| Flash Point, ℃ | ＞210 |
| Minimal Vacuum Level, Pa | ＜1.33×10⁻⁵ |
| Saturated Vapor Pressure, Pa | ＜6.65×10⁻⁶ |
Applications & Real‑World Usage Scenarios
🔌 Electrical & Electronics Industry
- TV tubes, fluorescent tubes, cathode ray tubes (CRT) – high‑vacuum exhaust & manufacturing
- Ordinary bulbs & lighting tubes – vacuum sealing & filling production line
- Capacitors – vacuum drying, impregnation & encapsulation
- Rectifier metallised film vacuum system – vacuum coating & film forming
- Electronic component manufacturing – high vacuum degassing, purification & assembly
🔬 Optical Industry
- Optical glass surface improvement & precision treatment
- Anti‑reflective (AR) coatings – vacuum deposition for lenses & displays
- Optical filters & precision mirrors – optical coating production line
- Camera lenses, optical instruments – high vacuum coating & assembly
🏭 Metallurgy Industry
- High‑vacuum furnaces – continuous operation under extreme vacuum
- Refractory metals – vacuum melting, degassing & sintering
- Thick‑film deposition, metal coating & vacuum heat treatment
- Special alloy & powder metallurgy – high purity vacuum processing
🧪 Plastics Industry
- Plastic surface improvement & hardness enhancement
- Mirror coatings on plastic substrates – decorative & functional vacuum plating
- Protective coatings, wear‑resistant films
- Packaging film & functional film coating – roll‑to‑roll vacuum coating lines
🧪 Other Industries & Advanced Scenarios
- Metal processing & fuel purification – high vacuum distillation & refining
- Particle accelerators & physics equipment – ultra‑high vacuum support
- Molecular plants & molecular distillation systems
- R&D laboratories, university research, pilot plants
- Mass spectrometry & precision analytical instruments
- Vacuum drying, vacuum degassing & low‑pressure reaction systems
🛢 General Uses
Used as high‑temperature heat transfer fluid and stable transmission fluid in high‑temperature carriers and various precision vacuum instruments.
Packaging
5kg plastic drums, 25kg plastic drums, 25kg iron drums, 200kg iron drums
Suitable for industrial use, storage & global shipping.
