As a result, the water dew point (DP) and hydrocarbon condensation temperature (HCT) can be reproduced at the same time. Depending on what DP / HCT combination is required, the gas is either passed first through the DP generating module and than through the HCT saturating module or vice versa.
Each module consists of one saturator and from one to three separators.
The saturator serves to saturate the gas with water or hydrocarbon vapors. It is immersed in liquid bath where a specific temperature is maintained thermostatically. In the DP generating module the temperature is positive, whereas in the HCT generating module it can be either positive or negative.
The saturator is a tightly sealed metal vessel with the following components: pos. 6: a flow diffuser consisting of a quartz sand layer between layers of metal mesh; pos.5: an aerosol filter consisting of 2 layers of metal mesh with a cotton layer in between; pos.1: deflector.
There are also 3 tubes: pos. 7: gas inlet; pos. 2: gas outlet; pos. 4: distilled water or hydrocarbon inlet.
The gas saturation process is as follows: gas is supplied to the saturator inlet and passes through the flow diffuser, where the gas stream is broken up into small jets that enter the liquid creating small bubbles. These bubbles pass through the water/hydrocarbon layer, where the gas becomes saturated. Next, it passes through the aerosol filter, where any aerosols are removed from the gas flow. Then, the deflector interrupts the direct flow of any aerosols remaining after the filter, and the gas enters the outlet via the hole, pos. 3.
The separator is designed to remove excess moisture or hydrocarbons from the gas. Like the saturator, it is submersed in a liquid where the temperature is maintained by means of a thermostat. The separator has two or three stages. These consist of interconnected serpentine chambers encased in an airtight metal body. The gas is supplied to the inlet, pos.1, and then passes through all of the separator stages. During this process all of the excess liquids in the gas (moisture or hydrocarbons) collect on the inner walls of the chambers. Subsequently, the gas leaves the separator via the outlet, pos. 2. As a result of this process, the gas gains a dew point/hydrocarbon condensation temperature equal to the thermostatically controlled temperature.