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When it comes to achieving and maintaining high vacuum conditions, the choice of diffusion pump oil is a decision that directly impacts the quality of your work. IOTA 704, produced by the IOTA brand, is a specialized high vacuum diffusion pump oil that has been formulated to meet the rigorous demands of modern vacuum applications. With its low saturated vapor pressure, strong thermal stability, and good oxidation resistance, IOTA 704 has become a go-to solution for professionals in multiple industries who need a vacuum oil they can rely on.
For many users, the decision to select a diffusion pump oil comes down to two key numbers: vacuum level and saturated vapor pressure. IOTA 704 delivers on both fronts. The achievable vacuum level is less than 10⁻⁷ to 10⁻⁸ Pa, and the saturated vapor pressure is kept below 2×10⁻⁸ Pa. What this means in real-world terms is that the oil contributes very little to the total pressure inside the vacuum chamber. Over long periods of operation, this translates into a cleaner vacuum environment, fewer contaminants, and more consistent results — whether you are running a delicate electron microscopy session or a high-throughput coating production line.
The oil's oxidation resistance is another factor that sets it apart. Over time, many pump oils degrade when exposed to heat and residual gases, leading to increased vapor pressure and reduced vacuum performance. IOTA 704 is designed to resist this degradation, which means longer intervals between oil changes and lower overall maintenance costs for the user.
The technical profile of IOTA 704 speaks for itself. At 25°C, the viscosity is 38±3 cst — a value that strikes the right balance between flowability and vapor diffusion efficiency. The refractive index at 25°C ranges from 1.5500 to 1.5600, and the relative density is 1.06 to 1.07. These are not arbitrary numbers; they are the result of careful formulation work that ensures batch-to-batch consistency. The open cup flash point of ≥210°C confirms the oil's ability to withstand high temperatures without posing a safety risk. And with a freezing point of -35°C, the oil remains usable even in cold climates, eliminating the need for heating before use.
One of the strengths of IOTA 704 is its versatility. In the high vacuum metallurgy industry, it supports the purification of metals and the smelting of special alloys under controlled vacuum conditions. In electron tube and bulb manufacturing, it helps achieve the hermetic vacuum seals that these products require. For high vacuum coating and thin film applications, it provides the stable, low-contamination environment that is essential for producing high-quality films. In cutting-edge research facilities that operate atomic energy accelerators and electron microscopes, IOTA 704 helps maintain the vacuum conditions that make these instruments function properly. And in the display manufacturing sector, it contributes to the production of screens and panels that meet strict quality standards. Across all these fields, IOTA 704 performs with reliability and consistency.
IOTA 704 is offered in a variety of packaging formats to suit different usage scenarios. The 1 kg plastic bottle is perfect for laboratories and R&D environments where small quantities are needed. The 5 kg, 25 kg, and 50 kg plastic buckets are well-suited for workshop and production-floor use. And for large-scale industrial customers, the 200 kg iron drum provides a practical and economical option. The product is shipped and stored as a non-dangerous good, which means fewer regulatory hurdles and simpler logistics. The recommended storage conditions include keeping the product in a dry, cool place away from direct sunlight, with an acceptable temperature range of -40°C to 50°C.
With a shelf life of 3 years, IOTA 704 gives users plenty of time to plan their usage and avoid waste. This long shelf life, combined with the oil's inherent stability, makes it a practical choice for both occasional and regular users. The IOTA brand has built its reputation on delivering products that meet real-world needs, and IOTA 704 is a clear example of that commitment. Whether you are setting up a new vacuum system or maintaining an existing one, IOTA 704 is a diffusion pump oil that delivers on its promises — quietly, consistently, and effectively.
