SKC 232, 236, 252, 262 User Manual

Operating Instructions

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863 Valley View Road, Eighty Four, PA 15330 USA

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 both a syringe port with PTFE-lined septum and a hose connection and
acts as a shut-off valve for 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 page 3 for details.

FlexFoil Bag Note: Due to the physical properties of foil bag material, minor crimps
and creases may appear on the bags during SKC manufacturing and quality testing
as well as user handling. These marks only affect the aesthetics of the bag and not
its performance. Foil bags exhibiting minor crimps and creases are not subject to
replacement or refund as functionality is not affected.

Cautions

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.

Failure to follow warnings and cautions voids any warranty.

Sample bags are designed for single use only.

Operation

¨

000277

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 (stem protruding from the side of
the fi  ing).

3. To open the shut-off valve, hold the side
stem and turn the entire upper portion of
the fi  ing (including the brown syringe port
and the white section to which it is a ached)
counterclockwise one revolution. Turn on the
pump and sample (see Proper Bag Infl ation).



CAUTION: 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 shut-off valve, hold the side stem
and turn the entire upper portion of the fi  ing
(including brown syringe port and the white
section to which it is a ached) clockwise until it
is snug.

5. To withdraw samples using a needle and syringe,
carefully insert the needle into the septum port in
the center of the brown cap and pierce the septum.

Do not allow the needle to puncture the bag
material when piercing the septum.

2

Valves

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.
It is considered to be misuse and will void the SKC warranty.

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 on page 4 for tubing.

SKC sample bags are available in Tedlar®, FluoroFilm FEP, SamplePro
FlexFilm, 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
[e-mail].

For sample bag stability reports,

visit www.skcinc.com/bags.asp.

3

Accessories

PTFE Tubing, fi ts over bag fi tting and Grab Air 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 inlet and 222 pump exhaust,

1/4-inch ID, 5/16-inch OD .......................................................... 10 feet ..... Cat. No. 231-937

50 feet .....Cat. No. 231-924

Twin Port Pocket Pump Tubing Adapter Kit includes two
lengths of silicone tubing: 1/8-inch ID, 1/4-inch OD for bag
fi tting and 3/16-inch ID, 3/8-inch OD for pump fi tting; use with

Cat. No. 231-9-23 PTFE tubing (above) .................................................... Cat. No. 231-926

For more product information or assistance with applications, contact

SKC Technical Service at [e-mail].

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.asp.

www.skcinc.com

Form 3781 Rev 1402