Gas and Liquefied Gas Sampling Systems
A sample is drawn from the process and arrives at process pressure in the sample container. The container consists of a cylinder, at both ends equipped with a needle valve and a quick connect coupling. The cylinder is connected to the sampler.
Once in position, the product can flow through the sample cylinder. When sampling liquefied gases, a fixed amount of liquid is transferred to the expansion chamber to ensure partial filling of the cylinder. The operator closes the needle valves on the sample cylinder and allows the quick connect to be depressurised to a vent connection. The cylinder may be then disconnected from the sampler.