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Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 • www.skcinc.com
Single Polypropylene Fitted Bags
232, 236, 252, and 262 Series Sample Bags
The 232, 236, 252, and 262 Series sample bags feature a single polypropylene fi ing
that is used for both fi lling the bag and removing the sample for analysis. The fi ing
contains a syringe port with septum and a hose connection and acts as a valve to
open or close the hose connection.
Guidelines for Bag Sampling
1. Ensure that the bag material and fi ings are appropriate for the
compounds to be sampled.
2. Use only PTFE tubing to connect the sample bag to the pump to prevent
sample loss by adsorption on tubing walls.
3. Before using, fl ush the bag thoroughly with purifi ed air or nitrogen.
4. Analyze the sample within 24 to 48 hours. Long-term storage of aircontaminant mixtures in bags is not recommended.
5. Do not ship sample bags by air unless the cargo cabin is pressurized.
6. Infl ate bag properly (see Proper Bag Infl ation for details).
®
7. Due to the physical properties of FlexFoil
creases may appear on the bags during SKC manufacturing, quality testing,
and user handling. These marks only aff ect the aesthetics of the bag and not
its performance. FlexFoil bags exhibiting minor crimps and creases are not
subject to replacement or refund as functionality is not aff ected.
bag material, minor crimps and
Notes and Cautions
• Maximum Operating Temperature — Do not exceed these specifi cations:
• 236 Series Bags: 140 F (60 C) due to the SamplePro
temperature rating
• Do not use sample bags to sample compounds with boiling points > 249.8 F (121 C).
• SKC sample bags are designed for sampling air at atmospheric pressure only. A empting
to pressurize the bag can result in bag rupture and sample loss. Do not ship bag samples
by air freight in non-pressurized cargo cabin. Bags can burst under such conditions.
• All federal and state packaging and transporting regulations apply.
• SKC bag fi ing valves are extremely durable but are not intended for use as handles
or hanging devices. This type of handling may damage the seal, causing leakage. This
is considered to be misuse and will void the SKC warranty.
• Failure to follow warnings and cautions voids any warranty.
• Sample bags are designed for single use only.
®
FlexFilm bag material
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Operation
1. Flush the bag at least 3 times with purifi ed air or nitrogen before use.
2. To fi ll a bag, connect PTFE tubing from the exhaust port of an air sample
pump to the hose connection on the bag (the side stem protruding from the
polypropylene fi ing).
12:42 03/15/2017
ml
min
250
0.0 inH 2o
00:01:42
3. To open the valve, hold the side stem and turn the
entire upper portion of the fi ing (including the
brown or white septum cap and the white septum
body to which it is a ached) counterclockwise
one revolution. Turn on the pump and sample
(see Proper Bag Infl ation).
Do not turn side stem.
Do not use sample bags to sample compounds with
boiling points > 249.8 F (121 C).
4. When sampling is complete, turn off the pump.
To close the valve, hold the side stem and turn
the entire upper portion of the fi ing (including
the brown or white septum cap and the white
septum body to which it is a ached) clockwise
until it is snug.
The outside diameter of the syringe needle should
not be larger than 22 gauge (0.028 inch).
Do not allow the needle to puncture the bag material
when piercing the septum.
5. To withdraw samples using a needle and syringe,
carefully insert the needle into the syringe port
in the center of the brown or white septum cap
and pierce the septum.
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Proper Bag Infl ation
Avoid fi lling any bag more than 80% of its maximum volume. At the end of the
sampling period, turn off the pump and close the valve on the bag.
Incorrect
Infl ation
Correct
Infl ation
Filling Bags Using Negative Pressure
The SKC Vac-U-Chamber is a rigid air sample box that allows the direct fi lling of
an air sample bag using negative pressure provided by most personal air sample
pumps. When using the Vac-U-Chamber, the air sample enters the bag directly,
without passing through the pump. This eliminates the risk of contaminating the
pump or sample. The Vac-U-Chamber has rigid walls that will not collapse under
vacuum conditions, thus eliminating possible errors. All surfaces in contact with
samples are constructed of inert materials.
Small Vac-U-Chamber (supplied without pump) with polypropylene fi ttings;
suitable for use with 1-liter bags .................................................................Cat. No. 231-940
Large Vac-U-Chamber (supplied without pump) with stainless steel fi ttings;
suitable for use with 8-liter bags .................................................................Cat. No. 231-939
Extra-large Vac-U-Chamber (supplied without pump) with stainless steel fi ttings;
suitable for use with 10-liter bags ...............................................................Cat. No. 231-944
Jumbo Vac-U-Chamber (supplied without pump) with stainless steel fi ttings;
suitable for use with 25-liter bags ...............................................................Cat. No. 231-946
See Accessories for tubing.
SKC sample bags are available in Tedlar®, Standard FlexFoil®, and FlexFoil
PLUS with fi ttings made of stainless steel, polypropylene, or PTFE in sizes
ranging from 0.5 to 100 liters. SKC also manufactures custom sample bags.
Contact SKC at 724-941-9701 or skcorder@skcinc.com.
For sample bag stability reports, visit
http://www.skcinc.com/catalog/pdf/instructions/1805.pdf.
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Accessories
PTFE Tubing, fi ts over bag fi tting and pump exhaust,
3/16-inch ID, 1/4-inch OD ......................................................... 10 feet ....Cat. No. 231-9-23
PTFE Tubing, fi ts inside bag fi tting,
1/16-inch ID, 1/8-inch OD ......................................................... 10 feet ....Cat. No. 231-9-21
PTFE Tubing, fi ts Vac-U-Chamber sample inlet port,
1/4-inch ID, 5/16-inch OD .......................................................... 10 feet ..... Cat. No. 231-937
50 feet ..... Cat. No. 231-924
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy, which
provides SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited Warranty and Return Policy, go to h p://www.skcinc.com/
warranty.
www.skcinc.com
Form 3781 Rev 1812
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