Parker Balston - 1-800-343-4048

Where are Zero Air Generators typically used?

• Gas Chromatographs with following detectors, FID, FPD, PFPD and NPD
• Vehicle Emissions Analyzers, FID & Chemiluminescent
• Continuous Emissions Analyzers, Dilution and Cal-Gases
• Source Gas to LC/MS Exhaust Pump, Heated Nebulizer and Ion Spray

How to select Zero Air Generators for Gas Chromatography?

• Summate the total zero air need for all detectors that require support air and match to generator capacity. Parker suggests adding 20% to account for any error and to offer padding for future expansion.
• Select model 75-83 for up to 2 FIDs.
• Select explosion-proof model 75-82S for up to 2 FIDs.
• Select model HPZA-3500 for up to 8 FIDs.
• Select model HPZA-7000 for up to 16 FIDs.
• Select model HPZA-1800 for up to 40 FIDs.
• Select model HPZA-30000 for up to 67 FIDs.

Can the Zero Air Generators be installed outdoors?

No, indoor areas only and not subject to freezing temperatures.

Can the Zero Air Generators be installed outside the lab?

• Preference is in the same lab at the instruments.
• Yes, installer will have to account for pressure drop, piping impurities, and piping costs.
• Long runs of piping can take time to fill with generated zero air, expect an initial overflow condition.

What is needed to install Zero Air Generators properly?

• A compressed air supply, relatively free of oil and water.
• Inlet isolation valve to turn compressed air supply on and off.
• Inlet pressure regulator, refer to model 72-130-V883.
• Outlet pressure regulator, refer to Parker 405 series.
• Outlet flow meter, refer to series Parker WFM series.
• Appropriate length of ¼" refrigeration grade copper.
• Bench or Wall Space for Mounting
• Electricity

What are the maintenance requirements for Zero Air Generators?

• Replace inlet & outlet filter cartridges annually, refer to MK maintenance kit.
• Replace the catalyst/heater module every 3-5 years.

How do Zero Air Generators remove all hydrocarbons to <0.05 ppm as methane?

A proprietary blend of catalyst material combined with a balance of platinum is heated to oxidize all hydrocarbons (methane and non-methane) into carbon dioxide and water vapor.

What does it mean when the red "check system" light is blinking?

• It is time to replace the internal heater/catalyst module, call Parker technical services at 800-343-4048
• This is also an ideal time to service filter cartridges.

What to do if Zero Air Generators indicate "overflow" fault?

• Check to make sure that actual flow of zero air needed is within the rated output capacity of generator.
• Snoop all tubing connection points from the outlet of the generator to the inlet of each instrument. A tiny leak is enough to cause overflow fault.
• Install properly sized WFM series flow meter off the outlet of the generator.
• Open right side-panel door and look / listen for air leak.
• Call Parker technical services at 800-343-4048.

What to do if Zero Air Generators will not warm up (LED stays orange on front purity graph).

• Perform same steps as listed for "overflow" fault indication.
• Inspect inlet filters for leaks.

What to do if Zero Air Generators provides no flow or pressure.

• Open compressed air inlet ball valve to supply compressed air to generator.
• Inspect compressed air supply, make sure pressure is above 40 psig.
• Verify generator not installed backward; check port labeling and compressed air supply tubing.
• Remove generator cover, look for green residue on brass fittings, and if present call technical support department.
• Replace all filter cartridges, purchase and install MK style maintenance kit.

What to do if baseline exhibits a spike at exact same time interval on chromatogram.

• Inspect inlet compressed air at generator inlet for pressure fluctuations.
• Verify that a pressure regulator is installed on the inlet and outlet of the generator.
• Install purified 72-007 zero air buffer tank.

What to do if moisture trap or scrubber after zero air generators gets spent in a very short time.

• Remove scrubber from generator output line.
• If unwilling to remove scrubber, install model 64-01 membrane air dryer at the inlet of the zero air generator.