In vacuum applications, a cold trap is a device that condenses all vapors except the permanent gases into a liquid or solid. The most common objective is to prevent vapors being evacuated from an experiment from entering a vacuum pump where they would condense and contaminate it. Particularly large cold traps are necessary when removing large amounts of liquid as in freeze drying.
Pumps that use oil either as their working fluid (diffusion pumps), or as their lubricant (mechanical rotary pumps), are often the sources of contamination in vacuum systems. Placing a cold trap at the mouth of such a pump greatly lowers the risk that oil vapors will back stream into the cavity.
Care should be taken when using a cold trap not to condense liquid oxygen (a light blue liquid) into the cold trap. Liquid oxygen is potentially explosive, and this is especially true if the trap has been used to trap solvent. Liquid oxygen can be condensed into a cold trap if a pump has sucked air through the trap when the trap is very cold.
Ai T40 -40°C/°F cold trap features
- No dry ice or liquid nitrogen needed
- All steel housing for durability
- Small footprint
- Plug and play, no assembly required
| Electrical requirements
|| 110V 60Hz 1-PH 6A or 220V 50/60Hz 1-PH 3A, 660 watts
|Compressor|| Make: Embraco
Power: 1/3 HP (single stage)
110V: 1030 BTU / 260 Kcal/h / 302W
220V: 840 BTU / 212 Kcal/h / 246W
0.9 gallon (3.5 liters)
Top diameter 7 inches
Bottom diameter 6 1/2 inches
Height 8 1/4 inches
|| Range: -40°F (-40°C) to ambient
Exterior: powder coated steel
Interior: polished type 304 stainless steel
|Trap|| Material: high borosilicate glass 3.3
|Vacuum connection||3/8" hose barb|
|Recommended coolant|| For 50°F/10°C or higher: purified water
Between 50°F/10°C and -40°F/°C: 50% Ethylene glycol + 50% purified water
| Unit/shipping weight
|| 68 Lb / 115 Lb
| Unit/shipping dimensions
|| 17.5 x 22 x 28" / 25 x 29 x 38" (WxDxH)
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