Fluorescent Orange, Inhibited Ethylene Glycol-based Heat Transfer Fluid for Thermal Transfer Applications from -60°F to 350°F.
DOWTHERM™ 4000 inhibited ethylene glycol (EG) is a high-quality thermal fluid with the highest maximum use temperature of any glycol-based fluid. DOWTHERM™ 4000 is dyed a bright, fluorescent orange color to aid in leak detection in a variety of systems.
DOWTHERM™ 4000 is comprised of 92% EG and 8% corrosion inhibitors and water, allowing a greater thermal stability and higher operating temperature up to 350°F (175°C). DOWTHERM™ 4000 also provides burst and freeze protection down to -100°F (-73°C).
DOWTHERM™ 4000 provides exceptionally long fluid life in thermally demanding applications and reduces the frequency of maintenance intervals.
Composition (% by weight)
Ethylene glycol-based fluid (92%)
Performance Additives (8%)
Color: Fluorescent orange
Specific Gravity (60/60°F): 1.13-1.14
pH of solution (50% glycol): 8.5-9.0
Reserve Alkalinity (min): 25.0 ml
Operating range: -60°F to 350°F for heat transfer
-100°F for burst protection
Broad Operating Temperature Range (-60°F to 350°F) Fluorescent Orange Color for Leak Detection Increased Concentration of Inhibitors Excellent Corrosion Protection Extended Fluid Life Cycle Reduced Maintenance Intervals
Repetitive & Frequent Maintenance Intervals
High Temperature Glycol Instability
Excessive Heat Transfer Fluid Loss through Difficult to Find Leaks
DOWTHERM™ 4000 can be used in a wide range of heat transfer applications with demanding temperature fluctuations — including, but not limited to:
Heating, Ventilation & Air Conditioning (HVAC)
Chill water & hydronic heating loops
Geothermal (ground source heat pumps)
Snow melt & Turf heating systems
Solar hot water heating
Fire water sprinkler systems
Refrigeration
Ice skating rinks
Cold storage, refrigerated warehouses & supermarkets (secondary loop)
Thermal Energy Storage (TES)
Water is a critical aspect for any glycol-based thermal fluid, the inherent properties of water allow for efficient and effective thermal transfer. But how does water quality affect performance and system equipment? Learn how water quality can affect your system and what you can do to prepare for long-term success.
Dow's glycol fluids stand apart in the heat transfer fluid industry due to their dynamic properties and a broad portfolio of specialized grades of DOWFROSTTM and DOWTHERMTM with best in class performance.
When starting up high temperature equipment after prolonged downtime, seal degradation and failure can be a major problem. Learn the insights from Dowtherm™ Dan and prepare you and your team from avoidable maintenance costs.
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