What is dowtherm Vapour?
Description DOWTHERMTM A heat transfer fluid is a eutectic mixture of two very stable compounds, These compounds have practically the same vapor pressures, so the mixture can be handled as if it were a single compound. DOWTHERM A fluid may be used in systems employing either liquid phase or vapor phase heating.
What does dowtherm mean?
heat transfer fluid
Physical properties of Dowtherm A DOWTHERM™ A from The Dow Chemical Company is a heat transfer fluid suitable for non-pressurized liquid phase systems with a maximum temperature of 550°F (288°C).
What is the boiling point of dowtherm?
about 258° C.
This compound can be used for heating purposes in a similar manner to steam but with the additional advantage of higher temperatures for the same pressure. The boiling point at atmospheric pressure is about 258° C. and at 135 Ib. per square inch gauge pressure it gives a temperature of 400° C.
Which Following is the properties of DOWTHERM A?
DOWTHERM A heat transfer fluid is a combustible material but has a relatively high flash point of 236°F (113°C) (SETA), a fire point of 245°F (118°C) (C.O.C.), and an autoignition temperature of 1110°F (599°C) (ASTM, E659-78). The lower flammable limit is 0.6% (volume) at 175°C , while the upper limit is 6.8% at 190°C.
Where are dowtherm vapors used?
DOWTHERM™ A is a synthetic organic thermal fluid based on a eutectic mixture of two highly stable compounds (biphenyl (C12H10) and diphenyl oxide (C12H10O)). DOWTHERM™ A can be used in both liquid and vapor phase systems and is suitable for indirect heat transfer applications.
Is dowtherm flammable?
Instead of steam, Dowtherm is used as a heating medium. Unlike steam, this liquid is heated to approximately 600 Degrees F. and operated at a low pressure of 30 psig. At ambient pressure and temperature, Dowtherm is not flammable because it has a flashpoint of approximately 400 Degrees F.
How do you heat up dowtherm?
Units are heated by burning gas, oil, and coal, as well as by electricity. Also, in certain operations, DOWTHERM fluids can be heated by high pressure steam. This latter technique is used on jacketed vessels where pressure limitations require the low pressure of DOWTHERM fluids.
Is dowtherm a flammable?
What is dowtherm made of?
DOWTHERM™ A is a synthetic organic thermal fluid based on a eutectic mixture of two highly stable compounds (biphenyl (C12H10) and diphenyl oxide (C12H10O)).
Is dowtherm hazardous?
May be harmful if swallowed and enters airways. At room temperature, exposure to vapor is minimal due to low volatility; single exposure is not likely to be hazardous. May cause headache and nausea due to odor.
What is operating temp for thermic fluid application?
Eastman Therminol® 55 heat transfer fluid is a unique, synthetic fluid designed to provide reliable, consistent heat transfer performance over a long life at maximum bulk temperatures up to 290°C (550°F).
Why is dowtherm a safety hazard?
Combustion products may include and are not limited to: Carbon monoxide. Carbon dioxide. Unusual Fire and Explosion Hazards: Violent steam generation or eruption may occur upon application of direct water stream to hot liquids. Liquid mist of this product can burn.
What is the maximum temperature of Dowtherm A?
DOWTHERM™ A from The Dow Chemical Company is a heat transfer fluid suitable for non-pressurized liquid phase systems with a maximum temperature of 550°F (288°C). with practically the same vapor pressures – suitable as a indirect heat transfer fluid for
Which is a stable compound in Dowtherm A?
DOWTHERM™ A is a eutectic mixture of two very stable compounds biphenyl – C12H10 diphenyl oxide – C12H10O with practically the same vapor pressures – suitable as a indirect heat transfer fluid for
What makes a heat transfer fluid a Dowtherm?
HEATTRANSFERFLUID DOWTHERM* A heat transfer fluid is a eutectic mixture of two very stable organic compounds, biphenyl (C 12 H 10 ) and diphenyl oxide (C 12 H 10 O). These compounds have practically the same vapor pressures, so the mixture can be handled as if it were a single compound.
Which is less viscous propylene or DOWTHERM SR-1?
DOWTHERMSR-1 fluid is considered the standard ethylene glycol-based fluid for most applications, fluids are less viscous than propylene DOWTHERM4000 fluid is specified