Sample coolers for safe chemical sample dispensing
When samples are taken from processes at high temperatures, anything above 140° F could be considered as putting the operator at risk. Our systems allow the sample to cool in situ before being handled.
We would recommend that the sampler is supplied with a cooler to bring any high temperatures to safe levels. We have two designs of heat exchanger we can offer, with both types completely isolating the sample liquid from the cooling liquid.
Coil Heat Exchanger
This heat exchanger utilizes a small bore tube through which the sample flows into the chosen sample dispensing method. This tube is coiled and positioned within a cylindrical water jacket. The cylinder has a water inlet and outlet which should be connected on site to a cold running water source.
As cold running water passes over the coil the heat is drawn away from the sample. This cooling water supply only needs to be flowing when a sample is being taken, which typically amounts to only around 10 seconds. Our standard units can reduce the sample temperature by 212° F depending on sample flow rates. For higher temperature drops larger heat exchangers are recommended.
Volumetric Heat Exchanger
This heat exchanger utilizes a fixed volume sample holding cylinder. The sample is dispensed from the sample valve into the cylinder. The cylinder has an outer cooling jacket which includes water inlet and outlets to connect to a running cold water source. The sample is then released from the cooling cylinder into the sample bottle using a ball valve.
Our heat exchangers can be manufactured from Hastelloy components for corrosive processes. The design also lends itself to remote processes where it is not possible to use cooling water. The sample can still be taken from the process pipeline using normal methods and held in the volumetric cooler. The sample can be left within the cooling chamber to cool naturally. This is often achieved very quickly due to the large metal content of the heat exchanger quickly drawing the high temperature away from the contained sample.