Tedlar Bag with PP fitting and clip seal

Description

These Tedlar bags are open on one side (not sealed). You can close this open side yourself using a clip-seal rod (also know as a c-clamp). This way you can place objects (or liquids) in the sampling bag and then seal the bag airtight and leak-free.

The bag has a single polypropylene fitting which combines the valve and septum into one. You can connect a hose (tubing) of 3/16″ (internal diameter of the hose) to the fitting.

Close Tedlar bag with c-clamp

The clip-seal is made of polyethylene and available for Tedlar bags from 0.5 liters to 100 liters. The c-clamp consists of 2 parts, a round rod and a rod with a c-shaped opening.

To create an airtight, leak-free seal, wrap the open end of the sampling bag around the round rod once. Then press the rod (with the bag around it) into the “C” shaped opening of the other part. Press the center of the rod into the opening first, then move outward toward each end. The bag is now closed.

The clip-seals are also optionally available separately.

How to Use an Open-Ended Tedlar Bags

An open-ended Tedlar bag lets you place an object or material sample inside before closing the bag with a clip seal. This makes it useful for collecting air from around a sample to investigate the odours or volatile compounds it releases.

How does it work?

Place the object in the bag, taking care not to damage the film. Wrap the open end once around the round sealing rod, then press the rod into the C-shaped clip. Once the bag is closed, air from inside the bag can be collected through the polypropylene fitting for odour or off-gassing analysis.

This approach can be used with materials or products that are difficult to sample through a conventional, fully sealed gas bag.

For meaningful results, use a consistent procedure: keep the sample size, amount of air and time in the bag the same when comparing objects. Collect and analyse the air sample as soon as practical, since some odour compounds may change or be lost during storage.

Background Tedlar gas bags

The Tedlar bags are made of 2 mil Tedlar® film from the DuPont® film company and are strong, durable and chemically inert to a wide range of gases.

The Tedlar gas bags are the standard for sampling volatile organic compounds, abbreviated as VOC or VOC (from the English volatile organic compounds). The gas bags are used for indoor air sampling, hazardous waste locations, leaking underground storage tanks, soil gas sampling, gas mixing, calibration test standards and various other gas sampling needs.

Other fitting/ connections

Do you prefer a PTFE or stainless steel fitting instead of a polypropylene fitting? Please contact us for availability.

Additional information