DEVEX Gas Sampling Bag

1. DEVEX Gas Sampling Bag

DEVEX film is developed specifically for making high quality gas sampling bags. It is composed of total 11 layer films (PET, PA, Aluminum, PE, etc) with thickness 120-140um.It has superb strength and low permeability; meanwhile it possesses excellent chemical inertness and stability. The overall property of DEVEX film exceeds that of PVDC film such as Saran. During lamination, environmental-friendly adhesive is used to eliminate solvent residue such as benzene, acetone, and esters. DEVEX gas sampling bags have a wide range of applications including hydrocarbons, CO,CO2, nitrogen, hydrogen, oxygen, hydrogen sulfide, nitrogen oxides and halogens. But it is not recommended to use for hydrogen sulfide, nitrogen oxides and halogens at ppb level. Compared to Polyfluoro film bags, DEVEX bags have low price, and can be used in VOCs assessment.

DEVEX gas sampling bags are developed by adopting international advanced film-making technology specifically for making high quality gas.

Features:

*composed of total 11 layer films

*superb strength and low permeability

*excellent chemical inertness and stability *wide range of applications

* low price

Standard Devex Gas Sampling Bag

Sizes:0.5L,1L,2L,3L,4L,5L,8L,10L,15L,20L,30L,and 40L or customized size.

Connectors

Plastic Straight Valve

Plastic valve is made of ABS with 5mm outer diameter shaft as connector. Plastic valve has on/off function. When turn shaft clockwise, it moves down; the valve is closed; when shaft moves up, the valve is open. It can handle gases that are not corrosive to ABS.

Plastic valve with side connector

It is made of ABS with 6mm outer diameter connector. When

turn cap counter-clockwise, the valve is open; when turn cap

clockwise, the valve is closed. Do not overtight the cap to

prevent damage of valve. Just finger tight. The cap comes with septum that can

be used to withdraw with a syringe. It can handle gases that are not corrosive to ABS.

Stopcock straight valve

It’s made of medical grade polycarbonate (PC) with 6mm connector. Valve stem (connector) is

vertical to the surface of film. The valve utilizes patented technology. The valve

body and cock are modeled and polished so that the valve does not need lubricant and sealing

part, the cross-contamination is eliminated.The valve not only has on/off function but also can

control flow rate. When turn handle toward the connector, the valve is open. The valve is closed

when the handle is turned vertically to the connector. The crewed connector has cap with

silicone septum in it, which is convenient for sampling. Since the valve does not introduce any

potential contamination, it can be used for VOC analysis.

Side-opening stopcock valve

It has similar functions to the stopcock valve . The difference is the connector it

horizontal to the surface of bag. The sampling cap is opposite to the connector. This patented

design is convenient for filling and sampling gas.

Metal valve

Metal valve is made of nickel-plated copper alloy with 5mm connector. The connector not

only uses to fill or release gas sample but also is shut-off valve.When turn the connector

counterclockwise, it moves up, the valve is open; the valve is closed when it moves down.

The connector should move up rapidly to prevent leaking since the distance of movement is

very short. The metal valve can be used in collecting or storing non-corrosive inorganic and

organic gases.

Metal Fitting

Metal fitting is made of nickel-coated copper alloy with 7mm outer diameter. The cap comes with

a silicone septum for easy sampling with a needle. Remove the cap when perform filling gas

sample or flushing the bag. The metal can be used in the circumstance that there is no corrosive

inorganic gases or organic gases.

Product brochures

1.Avoid filling pressure higher than 6000Pa. Fill gas until the bag is fully expanded, however, it is not so tense when you press it using your finger.

2.Keep away from flame and high temperature when filling and storage. Avoid contacting sharp stuff.

3.Before use, flush sampling bags three times with the gas you want to fill. When using a needle to draw gas from highly elastic septum, squeeze the septum with fingers in order to restore the sealing property after pulling out the needle. Working temperatures should be -15°C to +60°C .rating