Page 1
VWR
Zero Air Generator
Models 26000-020,
26000-022
Bulletin TI-ZAG3500-L1466
Installation,
Operation, and
Maintenance
Manual
Bulletin TI-ZAG3500-L1466
VWR Model 26000
Zero Air Generators
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Installation, Operation, and Maintenance VWR Zero Air Generator
Warranty
United States Only
Thank you for your recent purchase of VWR ChromGas instrumentation. Parker Hannifin
Corporation warrants all new instrumentation of its manufacture to meet Parker Hannifin
Corporation specifications and to be free from defects in workmanship and material
under normal use for twelve (12) months from the date of installation. If installation is
delayed by the customer, then the warranty period shall be thirteen (13) months from the
date of shipment.
During the warranty period, Parker Hannifin Corporation, at its option, shall repair or
replace defective parts at no charge to the customer.
Modification or alteration of the instrument without prior approval of Parker Hannifin
Corporation, or damage from abuse, misuse, or accident will void this and all warranties.
User serviceable components and consumables are not covered by this warranty.
Peripheral devices and software not manufactured by Parker Hannifin Corporation are
subject to the warranty of the original manufacturer. Parts on liquid handling systems
which are in contact with sample liquids, such as tubing, tip syringes and valves, are
excluded from this warranty. Damage to detectors caused by contamination are excluded
from this warranty.
Except as expressly provided above, Parker Hannifin Corporation does not make any
warranty of any kind, either expressed or implied, including, but not limited to the
implied warranties of merchantability and fitness for a particular purpose.
Parker Hannifin Corporation shall not be liable for any direct, indirect, consequential, or
incidental damages including damages from loss of business profits, business
interruption, loss of business information, and the like arising out of the use of or
inability to use the product.
Bulletin TI-ZAG3500-L1466
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VWR Zero Air Generator
Introduction 1
Installation 2
Site Requirements 2
Plumbing Connections 4
Operation 5
Maintenance 6
Filters 6
Catalyst Bed 7
Precautions 8
Figures in this Manual 9
Figure 1. Front and Rear Views of Model 26000-022
Figure 2. Front and Rear Views of Model 26000-020
Explanation of Warning Symbols 10
i
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Installation, Operation, and Maintenance VWR Zero Air Generator
Introduction
VWR Corporation produces a zero air generator designed to remove
hydrocarbons from a supply of compressed air.
The VWR zero air generator is capable of purifying an input source of air to
produce a zero-grade, hydrocarbon free output. The Model 26000-022 generator
can produce 3500 cc/min (0.124 ft
26000-020 can produce 1000 cc/min (0.035 ft
system is capable of producing an output gas that has a total hydrocarbon
content (THC) of less than 0.1 parts per million as methane. With this level of
purity, you can replace the high pressure gas cylinders rated as zero-grade or
ultra-zero-grade air that you may currently be using.
The system consists of three different functional areas to produce the purity level
required. The inlet filter is a 0.01 micron coalescing filter that removes particles,
oil and water that may be present in the inlet compressed air source.
Hydrocarbons are removed when the compressed air is passed through a
converter containing a heated catalyst. After cooling, a 0.01 final filter is used to
remove any residual particulate material.
3
/min) at 690 kPa (100 psig) and the Model
3
/min) at 690 kPa (100 psig). Each
1 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Installation
Installation of the VWR zero air generator is simply a matter of making the appropriate
plumbing connections and supplying power to the system (for indoor use only).
Site Requirements
Your zero air generator should be located near the equipment using the zero-grade air,
with a power source located nearby.
Model Number 26000-020 26000-022
Flow 1000 cc/min (0.035
Ambient
Temperature
Relative
Humidity
Weight 14 lbs. (6.4 kg) 20 lbs. (9.1 kg)
Dimensions 11.5"Hx6.5"Wx10"D
Voltage / Hz 100-125 VAC/60 Hz 100-125 VAC/60 Hz
Amperage
(Amps)
Fuse Type S 0.5 Amp 125 V Type S 1.5 Amp 125 V
Power 30 Watts 100 Watts
3
/min)
ft
40°-100°F (4.4°-38°C) 40°-100°F (4.4°-
Maximum 80% up to 31°C (50% at 40°C)
29x17x25cm
0.3 1.0
3500 cc/min 0.124
ft3/min)
38°C)
12"Hx6.75"Wx15"D
31x17x38cm
Installation
Category
Pollution Degree 2
Protection
Degree
II
IPX0
2 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Source Air Requirements
The source of compressed air should be regulated to be greater than the
requirements of the intended consumption. Pressure should not, however,
exceed 860 kPa (125 psig) and flow should not exceed 1000 cc/min
(0.035 ft
26000-022. Maximum operating efficiency occurs if the quality of the compressed
air source is maintained at less than 100 ppm total hydrocarbon content (THC).
This quality is achieved in most normal plant air systems equipped with an after
cooler. Centrally located compressed air system filtration is normally sufficient for
the zero air generator, but most compressed air piping systems contain some
rust and condensed liquids. VWR International recommends a coalescing filter
installed directly upstream from the inlet to the zero air generator to ensure the
removal of condensed liquids and rust from the plant air system.
If there is a risk that bulk contaminants may reach the generator inlet, use a
secondary depth type filter (such as Parker’s optional DXE filter
P/N 2002N-1B1-DX) in the source air line. This will extend the life of the primary
inlet filter.
3
/min) for Model 26000-020, and 3500 cc/min (0.124 ft3/min) for Model
If your plant air system does not sufficiently dry the air, install P/N 72-100
(Parker’s Inlet Compressed Air Conditioner) directly upstream from the inlet of
the zero air generator.
The catalyst can become contaminated if compounds that contain lead,
phosphorous, sulfur, silicates or halocarbons are present in the source air.
If in doubt, use an activated charcoal trap (such as Parker Hannifin’s
optional Halogenated Hydrocarbon Scrubber P/N 76080 in the source air
line to remove these chemical compounds).
3 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Plumbing Connections
Connect
the inlet filter. As you face the generator from the rear, the inlet filter is located on
the left (see Figure 1).
Note: Make gas connections using PTFE tape on all threaded
When making connections from the zero air generator to your piece of
equipment, be sure to use clean stainless steel or refrigeration grade copper
tubing. Do not use plastic tubing for the outlet line. Connect your
to the
the outlet filter is located on the right for Model 26000-022 (see Figure 1 located
at the back of this bulletin). For Model 26000-020, the filter is on the left side
panel when facing the front of the generator (see Figure 2, located at the back of
this bulletin).
To ensure flow rates within the capacity of the generator, a flow meter should be
installed in the outlet line between the generator and the instrument using the
purified air.
1/
” tubing from your source of compressed air to the 1/4” NPT fitting on
4
fittings. Do not use other compounds to seal the threads,
as this can contaminate the purified air.
1
/4” NPT fitting on the outlet filter. As you face the generator from the rear,
1
/8” outlet tubing
4 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Operation
After the zero air generator is installed, operation is very simple. The operating
procedure consists of turning on the generator, letting the catalyst heat up to
operating temperature, and starting the compressed air flow.
The following instructions take you step by step through the startup procedure:
For Model 26000-020
1. Start the flow of compressed air through the system and allow it to stabilize.
2. Supply power to the generator and turn on the power switch. A power light
should illuminate indicating that power is supplied to the generator.
3. Wait for the catalyst to heat up to its operating temperature (approximately 45
minutes).
4. Begin using your instrument.
For Model 26000-022
1. Supply power to the generator, and turn on the power switch. A power light
should come on indicating that power is supplied to the generator. No air is
needed at this time if you want a faster startup time.
2. Wait for the catalyst to heat up to its operating temperature. This should take
approximately 30 minutes. If you supplied compressed air to the unit, it will
take approximately 45 minutes to reach operating temperature.
3. For the fast start up, start the flow of compressed air through the system and
allow it to stabilize.
4. Begin using your instrument.
Caution: Do not overflow the unit. Maintain a flow rate at or below the maximum
flow rating, 3500 cc/min (0.124 ft
(0.035 ft
3
/min) for Model 26000-020.
3
/min) for Model 26000-022, and 1000 cc/min
5 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Maintenance
Routine maintenance procedures are described below to ensure an efficient flow
of high quality, hydrocarbon free air.
Filters
At least twice a year, the inlet and outlet filters should be checked. If either filter
is visibly dirty, it should be replaced. In any event, both filters should be replaced
each year. To remove the filters for maintenance, use the procedures detailed in
this section. Replacement filters may be ordered from Parker Hannifin using the
following part numbers:
Standard Filters
Primary Inlet Filter Assembly (0.01
micron)
Replaceable Filter Element (pkg of 5) 5/050-05-BXE
Outlet Filter Assembly (0.01 micron)
Replaceable Filter Element (pkg of 3) GS 3/050-05-95
Parker Part Number
A914D-BX
A914A-95
Optional Filters
Secondary Inlet Filter Assembly (0.1
micron)
Replaceable Filter Element (pkg of 3) 5/100-12-DXE
Halogenated Hydrocarbon Scrubber
Compressed Air Conditioner
Parker Part Number
2002N-1B-DX
76080
72-100
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Installation, Operation, and Maintenance VWR Zero Air Generator
Inlet Filter
1. Turn off the air flow and the power to the generator.
2. As you face the generator from the rear, the inlet filter (P/N A914D-BX) is
located on the left side of the back of the cabinet for Model 26000-022 (see
Fig. 1), and on the right side panel for Model 26000-020 (see Fig. 2).
3. Lift the bowl slightly and rotate the bowl portion of the filter clockwise 1/8 of a
turn to remove it downward from the inlet filter assembly.
4. Unscrew the filter from the filter assembly and replace.
5. Thread the new filter onto the filter assembly and reassemble the bowl
carefully onto the inlet filter. Turn the bowl counter clockwise on the filter
assembly until it stops (
1
/8 turn).
Outlet Filter
1. Turn off the air flow and the power to the generator.
2. As you face the generator from the rear, the outlet filter (P/N A914A-95) is
located on the right side of the back of the cabinet for Model 26000-022 (see
Fig. 1). When facing the generator from the front, the filter is on the left side
panel for the Model 26000-020 (see Fig. 2).
3. Lift the bowl slightly and rotate the bowl portion of the filter clockwise
turn to remove it downward from the inlet filter assembly.
4. Unscrew the filter from the filter assembly and replace.
5. Thread the new filter onto the filter assembly and reassemble the bowl
carefully onto the inlet filter. Turn the bowl counter clockwise on the filter
1
assembly until it stops (
/8 turn).
1
/8 of a
Optional Secondary Inlet Filter
Replacement of the filter element in the optional, secondary inlet filter kit is
accomplished in the same way as described above for the primary inlet filter.
Optional Halogenated Hydrocarbon Scrubber
The optional charcoal filter maintenance involves the complete replacement of
the filter kit as necessary to protect the catalyst from contamination. If you have
high concentrations of lead, phosphorous, sulfur, silicates or halocarbons in your
air source, you should change this filter frequently.
7 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
Catalyst Bed
The catalyst bed should be replaced if contamination occurs due to the presence
of lead, phosphorous, sulfur, silicates or halocarbons in the source air. If your
instrumentation begins to show signs of unpurified air, this may indicate a
contaminated catalyst bed. Replacement should be performed by qualified
service personnel only. Contact Parker Hannifin Corporation technical service to
order a replacement catalyst tower. (For 110V: Model 26000-020 P/N 75394
and Model 26000-022 P/N BO1-0020. For 220V units: Model 26000-020 P/N
75394-220 and Model 26000-022 P/N B01-0020-220).
Precautions
High temperature components are found inside the cabinet, and should not
require any user service. The temperature of the gas at the outlet port may reach
as high as 45°C (113°F).
The tubing and fittings connecting the generator to other sources and
instruments are under pressure. Be sure to relieve any pressure from the system
before loosening or removing any fittings or tubing.
8 Bulletin TI-ZAG3500-L1466
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Installation, Operation, and Maintenance VWR Zero Air Generator
p
p
Inlet Filter
Power Switch
Figure 1. Front and Rear views of Model 26000-022
Inlet Filter
Outlet Filter
Power
tacle
Rece
Outlet Filter
Figure 2. Front and Rear views of Model 26000-020
Inlet Filter
Power Switch
Power
Rece
tacle
9 Bulletin TI-ZAG3500-L1466
Page 13
Bulletin TI-ZAG3500-L1466 VWR Model 26000-020, 25000-022
P
s
b
d
o
a
Zero Air Generators
!
!
Symbol
➤
3
Description
Caution, refer to accompanying
documents for explanation.
Refer to Installation and Operation Manual, warning note #3 for
explanation.
Caution, risk of electric shock.
Surface may be hot and could
cause burns to the skin (found on
inside of some units).
Under certain conditions, metal
cabinet will be warm to touch
(70°C).
VWR International
1310 Goshen Parkway
West Chester, PA 19380
rices, product appearance and specifications are current at the time of printing,
ubject to change without notice. Availability for certain products may be limited
y federal, state, provincial or local licensing requirements. All prices are in U.S.
ollars unless otherwise noted. Offers valid in USA, void where prohibited by law
r company policy, while supplies last. Visit vwr.com to view our privacy policy and
dditional disclaimers.
©2006 VWR International, Inc. All rights reserved. Printed in U.S.A.
1
Bulletin TI-ZAG3500-L1466
VWR Model 26000
Copyright© VWR International, Inc. All Rights Reserved.
Zero Air Generators
Printed in U.S.A. June 2006
Bulletin TI-ZAG3500-L1466
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