TMC-705 Diffusion Pump Fluid

The TMC-705 Diffusion Pump Fluid from TMC Industries, supplied by Econtrol Devices, is a high-performance silicone diffusion pump fluid developed for professional vacuum pump applications. TMC-705 is a single-component (pentaphenyl trimethyl trisiloxane) clear fluid that is chemically equivalent to Dow Corning® DC-705. This methylphenyl silicone fluid is designed to provide superior resistance to oxidation, heat, and chemicals while enabling prolonged and stable operation in demanding vacuum pump environments.

TMC-705 Diffusion Pump Fluid is specifically formulated for high-vacuum oil diffusion pump applications. Its resistance to oxidation, heat, and chemical exposure helps maintain reliable performance during operation. The fluid does not crack under heat or when exposed to intake gas, unlike petroleum and fatty acid ester pump oils. It also does not emit oxidation gas or produce acid, tar, pitch, or other substances when the vacuum is broken during heating, making it suitable for prolonged and stable vacuum pump operation.

Key Features

The TMC-705 Diffusion Pump Fluid offers the following product features:

• Superior oxidation, heat, and chemical resistance.
• Does not crack under heat or when exposed to intake gas, unlike petroleum and fatty acid ester pump oils.
• Does not emit oxidation gas.
• Does not produce acid, tar, pitch, or other substances when the vacuum is broken during heating.
• Enables prolonged and stable operation of vacuum pumps.

Applications

TMC-705 is intended for:

• High-vacuum oil diffusion pump applications.

It is used in vacuum pump applications where prolonged and stable operation is required.

Material Compatibility

TMC-705 is compatible with most materials. For additional compatibility information, TMC Industries recommends contacting their technical team.

Physical & Environmental Properties

TMC-705 Diffusion Pump Fluid is supplied as a colorless, odorless liquid with the following physical properties:

• Form: Liquid
• Color: Colorless
• Odor: Odorless
• Boiling Point: 243°C
• Viscosity: 160 cSt
• Specific Gravity: 1.097 g/mL
• Molecular Weight: 546 g/mol
• Refractive Index: 1.575
• Surface Tension: 34.3 mN/m
• Volume Resistivity: 0.1 min. TΩ•m

All values are measured at 25°C, unless otherwise specified.

Packaging Options

TMC-705 Diffusion Pump Fluid is available in multiple packaging sizes to suit different operational requirements:

• 1 Gallon Jug – 8.5 lb / 3.8 kg
• 5 Gallon Pail – 44 lb / 20 kg
• 55 Gallon Drum – 440 lb / 200 kg
• Sample – 2.2 lb / 1 kg
• 275 Gallon Tote – Available Upon Request.

Shelf Life & Storage

When stored in its original packaging under normal storage conditions, TMC-705 has a shelf life of five years from the date of manufacture. TMC Industries also re-certifies the material every five years for up to twenty years.

Disposal & Recycling

TMC-705 Diffusion Pump Fluid can be recycled and reused. TMC Industries offers a used fluid reclamation service that restores used fluids to like-new condition while helping reduce replacement costs. Reclaimed fluids are tested to meet new product specifications, supplied clear and odorless, and include a Certificate of Analysis with every order. TMC Industries also offers a 100% satisfaction guarantee on reclaimed fluids, supported by a no-questions-asked refund policy.