Perma Pure ZERO-AIR GENERATOR - Manual (Page 3)

2 Form #240
Zero-Air Generator Manual Rev 11/98
Introduction
The Zero-Air Generator (ZAG) is a simple, light-weight, self-contained system capable of producing
high purity, particle free, dry air at up to 18 liters per minute. It is designed to replace gas cylinders as a
source of calibration standard. The ZAG can be used with stationary analyzers, but its portability
makes it especially well suited for use with remote monitoring sites and mobile testing facilities.
Operation is very simple. Ambient air is brought into the Zero-Air Generator where it is compressed
and then purified using a combination of membranes, adsorbents, and filters. The only outside item
that needs to be supplied is AC power.
Maintenance requirements are minimal and easy to perform. There are two desiccant canisters, one of
which needs to be replenished periodically; under normal use, it will last up to six months. The other
desiccant canister contains a catalyst that is not consumable. The only other regular maintenance is to
replace the particulate filter periodically. All other components in the system are designed to provide
years of trouble-free service.
The Perma Pure ZAG is ideal for use with the following monitors:
! Carbon monoxide ! Ozone
! Nitrogen oxides (NO
x
) ! Sulfur oxides (SO
x
)
! VOC’s (except methane)
Consult Perma Pure for other monitoring applications.
The rugged design of the ZAG makes it ideal for field use. The components are protected inside a
hard plastic enclosure, which is roughly the size and weight of a fishing tackle box. The ZAG takes up
a minimal amount of space and is very easy to start up.
In addition to its convenience, the ZAG is also a safe and cost-effective source of high purity air. Gas
cylinders are heavy, bulky, and under high pressure. Extreme caution must be exercised when
working with them. In addition, these cylinders are very expensive and can cause storage problems.
The only operating costs associated with the ZAG are electricity (about $75/year if run continuously)
and replacement desiccant. Depending on zero air consumption, it will normally pay for itself within 12
months.
Figure 1 – ZAG Flow Schematic
1