Huber tango - Information on the thermal fluids

Function description
OPERATION MANUAL Chapter 3
Unistat® V2.0.0en/09.06.16//15.09
38
3.2 Information on the thermal fluids
Non-compliance with the safety data sheet for the thermofluid to be used
INJURIES
 Risk of injury to the eyes, skin, respiratory tract.
 The safety data sheet for the thermofluid to be used must be read prior to use and its contents
respected.
 Observe the local regulations/work instructions.
 Wear your personnel protective equipment (e.g. temperature-resistant safety gloves, safety
goggles, safety footwear).
 Danger of slipping because floor and work area are contaminated. Clean the work station and
follow the instructions for the disposal of thermofluid and material on page 16 in section
»Proper disposal of resources and consumables«.
Non-compliance with the compatibility between the thermofluid and your temperature control
unit
PROPERTY DAMAGE
 Water and water plus an anti-freeze must not be used as a thermofluid (risk of freezing and
potential destruction of the evaporator).
 You can use a water-ethylene glycol mixture as a thermofluid within a temperature range from
-30 °C to +95 °C only for the following temperature control units. Compatible temperature con-
trol units: Unistat tango (w/wl), 405(w), 410(w), 425(w), 430(w), 510(w), 520(w), 525(w),
527(w), 530(w), 610(w), 615(w), 620(w), 625(w), 630(w), 635(w), 640(w).
It is recommended to use a mixture that allows a temperature 10 K lower than the allowable
min. temperature range of the temperature control unit (see data sheet from page 96 in sec-
tion »Annex«). For information about water quality, see www.huber-online.com.
 Observe the rating of your temperature control unit in accordance with DIN 12876.
 Ensure the following materials are resistant with respect to the thermofluid: Stainless steel
1.4301 / 1.4401 (V2A), copper, nickel, viton (FKM) or nitrile rubber (NR) / NBR / HNBR / ceram-
ic, carbon, al-oxide / red brass, brass, nickel-plated brass and silver solder.
 The maximum viscosity of the thermofluid must not exceed 50 mm²/s at the lowest working
temperature!
 The maximum density of the thermofluid may not exceed 1 kg/dm³!
Mixing different thermofluids in a thermal fluid circuit
PROPERTY DAMAGE
 Do not mix different types of thermofluid (such as mineral oil, silicone oil, synthetic oil, water,
etc.) in a thermofluid circuit.
 The thermal fluid circuit must be rinsed when changing from one type of thermal fluid to an-
other. No residues of the previous type of thermal fluid may remain in the thermal fluid circuit.
Inert gas blanket over the >Expansion vessel< [18] over 0.1 bar (g)
MATERIAL DAMAGE CAUSED BY MECHANICAL DAMAGE TO THE >EXPANSION VESSEL< [18]
 When using the optional sealing sets for Unistate in connection with a static inert gas overlay, a
pressure limit of 0.1 bar (g) must be used.
As thermal fluids we recommend the media listed in the Huber catalog. The designation of a ther-
mal fluid is derived from its working temperature range and the viscosity at 25 °C.
We recommend inert gas overlay for your temperature control unit. We therefore offer the sealing
set for Unistate in our accessory range. The temperature control units of the 400 series are already
standardly equipped with the connections for inert gas overlay.
When using Unistats, the thermal fluid is protected from environmental influences. Thus an in-
creased accumulation of moisture or an oxidative degradation of the thermal fluid is prevented.
Using a static overlay with an inert gas, a further significant extension of the useful life of the
thermal fluids can be achieved. This is especially true if you want to work long-term near the oper-
ating temperature limits of the thermal fluids. (hygroscopy, oxidation).