CRS ZPure™ HC (Hydrocarbon) gas filters

CRS gas purifiers and filters

Pure gas is a critical requirement in gas chromatography, spectroscopy, optics, lithography, and numerous other applications in manufacturing and analytical laboratories. The ZPure™ line of filters remove a wide range of contaminants to trace levels.

Features and benefits

  • High efficiency in-line traps with outstanding capacity.
  • High quality activated adsorbents for long purifier life and efficient contaminant removal.
  • Various size and fitting configurations to fit existing installations.
  • Filter lifetime is dependent on quality of incoming gas, and the flow rate.
  • Individually leak tested.

Recommended applications

It can be used to remove hydrocarbons heavier than butane from inert gases, He, Ar, N2, H2, and clean dry air (CDA) to low ppb levels. It is recommended for most applications requiring hydrocarbon-free gas.

Product specifications

ZPure HC
Volume Function Capacity (nominal-max) Outlet concentration at nominal flow rate Flow rate (nominal-max) Max pressure Dimensions Fittings
130 cc Removes hydrocarbons (C5 and heavier) 11 - 36 g < 5 ppb 1 - 10 SLPM 68.9 bar / 1000 psi 3.2 cm x 28 cm 1/8" and 1/4" brass and stainless steel compression
475 cc 40 - 131 g 3.7 - 36 SLPM 3.8 cm x 57 cm
500 cc 42 - 137 g 3.8 - 38 SLPM 13.8 bar / 200 psi 5 cm x 35 cm
750 cc 63 - 206 g 5.8 - 57 SLPM 5 cm x 50 cm

1) The nominal hydrocarbon capacity is determined for an inlet impurity level of 500 ppm pentane.
2) The maximum hydrocarbon capacity is determined for an inlet impurity level of 2300 ppm pentane.
3) The nominal flow rate is the recommended flow rate for an estimated gas purifier life of 1 year. This assumes the following inlet impurities: 1 ppm hydrocarbons (C5 and heavier)
4) The maximum recommended flow rate is recommended for intermittent use only.


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