SKC 231 Series Manual de usuario

Dual Stainless Steel Fitted Bags

231 and 237 Series Sample Bags

Operating Instructions

863 Valley View Road, Eighty Four, PA 15330 USA

Tel: 724-941-9701 • www.skcinc.com

The 231 and 237 Series sample bags feature dual stainless steel ﬁings – an inlet

valve for ﬂushing and ﬁlling and a septum ﬁing for removing samples.

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, ﬂush the bag thoroughly with puriﬁed air or nitrogen.

4. Analyze the sample within 24 to 48 hours. Long-term storage of air-contaminant

mixtures in bags is not recommended.

5. Do not ship sample bags by air unless the cargo cabin is pressurized.

Notes and Cautions

• Maximum Operating Temperature — Do not exceed these speciﬁcations:

• 231 Series Bags: 225 F (107 C) due to ﬁing O-ring temperature rating

• 237 Series Bags: 140 F (60 C) due to the SamplePro®FlexFilm bag material

temperature rating

• Do not use sample bags to sample compounds with boiling points > 249.8 F (121 C).

• SKCsamplebagsaredesignedforsamplingairatatmosphericpressureonly.Aempting

to pressurize the bag can result in bag rupture and sample loss. Do not ship bag samples

by air freight in a 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.

Operation

1. Flush the bag at least 3 times with puriﬁed

air or nitrogen before use.

2. To ﬁll the bag, connect PTFE tubing from the

exhaust port of an air sample pump to the

hose connection on the bag (stem protruding

from the top of the inlet ﬁing).

3. Ensure that the valve is locked open by tightening the

knurled thumbscrew clockwise until snug. Turn on the

sample pump to ﬁll the bag (see Proper Bag Inﬂation).

Do not sample compounds that exceed the 225 F (107.2 C)

temperature rating of the ﬁing O-rings.

When using 237 Series SamplePro FlexFilm bags, do not

sample compounds that exceed 140 F (60 C) temperature.

Do not use sample bags to sample compounds with

boiling points > 249.8 F (121 C).

4. When sampling is complete, turn oﬀthe pump and

loosen (turn counterclockwise) the knurled thumbscrew a

maximum of 2 revolutions.

5. Close the shut-oﬀvalve by pulling up on the valve stem.

(Note: Ensure the PTFE tubing is not pulled oﬀwhile

pulling up on the valve stem.) Tighten the knurled

thumbscrew until snug to lock the valve closed.

The outside diameter of the syringe needle should not be

larger than 22 gauge (0.028 inch).

Do not allow the syringe needle to puncture the bag

material when piercing the septum.

6. To withdraw samples using a needle and syringe,

carefully insert the needle into the port in the septum

ﬁing and pierce the septum.

Proper Bag Inﬂation

Avoid ﬁlling any bag more than 80% of its maximum volume. At the end of the

sampling period, turn the pump oﬀand close the valve on the bag. Tighten the

knurled thumbscrew to lock the valve closed.

Incorrect

Inﬂation

Correct

Inﬂation

SKC sample bags are available in Tedlar®, FlexFoil®PLUS, and Standard FlexFoil with

ﬁttings 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 [email protected].

For sample bag stability reports, visit

http://www.skcinc.com/catalog/pdf/instructions/1805.pdf.

Form 3714 Rev 1706

Accessories

Replacement Septa, pk/10.......................................................................Cat. No. 231-9-04

PTFE Tubing, ﬁts over bag ﬁtting and pump exhaust,

3/16-inch ID, 1/4-inch OD..........................................................10 feet.....Cat. No. 231-9-23

PTFE Tubing, ﬁts inside bag ﬁtting,

1/16-inch ID, 1/8-inch OD..........................................................10 feet.....Cat. No. 231-9-21

PTFE Tubing, ﬁts 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

www.skcinc.com

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 com-

plete SKC Limited Warranty and Return Policy, go to hp://www.skcinc.com/

warranty.asp.

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