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Explosion Proof Drying of Sample Gas

29 June 2018

The full-range supplier and specialist for gas sampling and conditioning equipment AGT-PSG offers different sample gas compressor coolers for safe and reliable gas analysis in ATEX zone 1 and 2. The brand new coolers series BCR02 Ex and BCR 03 Ex are especially built for operation in ex-zone 2 and coolers series BCR05 Ex are built for operation in ex-zone 1.

BCR05 Ex for ex-zone 1 with 1 – 4 gas paths
BCR05 Ex for ex-zone 1 with 1 – 4 gas paths

All coolers are designed and manufactured according to the latest ATEX-guideline EN2014/34/EU. These high performance and low maintenance coolers are especially used for continuous extractive gas analysis. They serve primarily for exact constant lowering of the sample gas dew point and thus for drying of the humid sample gas flow. In this way water vapour cross sensitivities and volumetric errors are reliably minimized and damages of the sensible analyser are avoided.

The precise proportional temperature control in combination with the long-lasting hot-gas bypass system and the high performance heat exchangers achieves low extremely constant outlet dew points of 3°C. Also load fluctuations and high thermal stress are compensated reliably. The “mono” or “dual” heat exchangers with one or two gas paths each are built in a solid aluminium cylinder which guarantees an optimal energy exchange between sample gas and cooling medium. 

In addition, the aluminum cylinder is an effective cold storage that supports the compensation of unfavorable operating conditions. The coolers are equipped with exchangeable heat exchangers which allows an easy replacement without dismantling the device. For drying of explosive sample gas AGT-PSG offers heat exchangers made of stainless steel for integration within tubed systems. Alternatively heat-exchanger materials PVDF or glass are also available.

For condensate removal zone 2 coolers BCR02 Ex and BCR03 Ex are equipped with integrated condensate pumps. For excess pressure applications maintenance free working automatic liquid drainers made of stainless steel can be connected directly at the condensate outlet of all coolers thus forming a complete functional unit for simple integration in gas analysis systems.

The cooling system is filled with CFC-free refrigerant R134a. The sample gas coolers are all equipped with an indication for temperature monitoring (unique on the market for zone 1 cooler BCR05 Ex) and a potential-free alarm contact. The latest data sheets are all available on the brand new website.

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