Cold traps
Cold traps / cold fingers made of glass or metal
The task of a standard cold trap / cold finger is for example to catch and hold the condensate of a gas stream in front of a vacuum pump.
Hence different materials may be present in the gas stream (e.g., water / solvent / acid or alkali containing gases), the condensation temperature of the material to be condensed must be considered first. Having a cold trap, the material made off (glass or metal) and the geometry of the cold trap play an important role regarding the performance of the cold trap. In order to increase the performance of cold traps, these are sometimes provided with integrated baffles, so that the gas is more swirled in the condensation space and thus better condensation can take place on the cold inner wall of the cold trap.
In order to obtain a constant performance of a cold trap / cold finger, the coolant level (LN2) inside the Dewar flask also must be kept constantly on a high level. This can be achieved with an automatic LN2 level control. By such an automatic LN2 level controller, the cold trap / cold finger is always supplied with sufficient LN2 coolant, so that an optimal condensation performance of the cold trap / cold finger is guaranteed. For this purpose, complete LN2 level control systems for cold traps are offered.
Cold finger S29 / SL29
Applications
- Gas cleaning by condensation e.g in vacuum systems
Characteristics
- Dewar flasks according to DIN 12492
- For liquid cooling agents, e.g. LN2 (-196°C)
- For solid cooling agents CO2 (-77°C) with solvent (CO2-wire basket necessary)
- Pressure-free coolant sphere inside the Dewar flask
Versions
- K = spherical joint S29
- OK = spherical joint S29 with O-ring sealing
- GL= Glass screwthread with olive GL18
- NW= Vacuum flange
- Special dimensions
- Special connections
- Made of Borosilicatglas 3.3
- Good chemical resistance
- Good thermal resistance
- Simple low cost design
- Suick exchange is possible
Type S 29 GL
Specifications
Cold trap completely KF 29 / KFL 29
Applications
- Gas cleaning by condensation e.g in vacuum systems
Versions
- K = spherical joint S29
- OK = spherical joint S29 with O-ring sealing
- GL= Glass screwthread with olive GL18
- NW= Vacuum flange
- special dimensions
- special connections
Advantages
- Made of Borosilicatglas 3.3
- Good chemical resistance
- Good thermal resistance
- Simple low cost design
- Quick exchange is possible
Type KF 29-GL
Type KF 29-NW16 / NW25
Specifications
Cold trap completely V2A KF54V-K16 / KF54V-K25
Applications
-
gas cleaning by condensation e.g in vacuum systems
Versions
- KF NW16 = Small flange NW16
- KF NW25 = Small flange NW25
- Special dimensions
- Special connections
Advantages
- Made of stainless steel 1.4301
- Good chemical resistance
- Good thermal resistance
- Simple low cost design
- Quick exchange is possible
- Two sections
A special version is the two section cold trap. It has a KF NW 50 flange as the connection part. This type of cold trap enables the condensation area to be separated from the upper section of the cold trap. This ensures that the removal of the condensation and the cleaning of the cold traps can be carried out very easily. This version is also suitable for when a cold trap has to be permanently installed inside an apparatus, so that only the lower section of the cold trap has to be removed in order to empty out the condensation. The KF NW 50 flange connecting piece is secured in place using a spring Aluminium clamp and this is included in our scope of delivery.
Automatic LN2 filling system with a cold trap KF54-V-K16-Z-DSS2000
Automatic level control systems for liquid nitrogen
In many cryogenic applications, such as shrinking of shafts and bushings in LN2, freezing of components or biological samples, using of LN2 as a coolant in cold traps, calibrating of sensors in LN2, etc., it is important to maintain a constant LN2 liquid level. This is achieved with the LN2 level control of KGW-Isotherm. With help of our LN2 level control, it is possible to keep a constant level of LN2 between the minimum and maximum sensor inside the flask. The KGW LN2 level control can be connected to almost every LN2 container.
Automatic LN2 - level control devices for manual shrinking
To make manual or automatic connections safely through shrinking, it is important that a sufficient cooling is ensured at the shrinking components. LN2 is usually used as coolant for shrinking bushes or shafts. With help of an automatic LN2 level control system the necessary cooling can be ensured. The cooling via LN2 can be secured for the shrinking process.
Automatic LN2 - level control for cold trap application
Automatic LN2 - level control with a stainless steal cold trap S 54V-K16-Z, Dewar flask, lid, gas outlet tube and LN2 store vessel with 25 litre. Art.No. 2750-25
Automatic LN2 - level control devices with a corresponding Dewar flask
Chemistry Pump Device With Two Cold Traps CP
Applications
- Flexible applications in laboratory e.g. for
- drying processes
- condensation processes
- vacuum technology
- gas cleaning
- Compact design
- Easy handling
- Suitable for aggressive mediums
- Glass components in Borosilicat 3.3
- O-Ring sealed spherical joints incl. fork clamps
- Frame work on wheels
- Table board made of stainless steel
- Parallel operation with 2 cold traps On failure of one cold trap the other cold trap keeps on working
- Alternate operation with 1 cold trap The cold trap in use are chosen by the valve adjustment
Technical Specifications
- Dewar: Type : 12 C
- Content : 1100ml
- Cold trap: Type : S 29 O
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