Sampling Check Valves
These are the valves used to take samples of aggressive toxic fluids from the line or reactor safely and without affecting the environment. This type of valve, which makes it possible to take samples easily under pressure without stopping the process, has different models and is indispensable especially for the chemical, petrochemical and pharmaceutical industries.
| Type | Description | Pros | Cons |
| In-line Sample Valve | Fitted directly on the process line or on a bypass. A constant flow through the valve guarantees a directly representative sample. | • Directly representative sample | • Liquid/gas flow required (re-circulation loop, process line) |
| Lateral Sample Valve | The valve is fitted on the side or bottom of a reactor or on the side of a larger pipeline. | • Bypass not required for large pipes • Reactor sampling without re-circulation loop | • Dead space needs to be purged or flushed to guarantee a representative sample. |
| Top of Reactor Sample System | Acts as a re-circulation loop. | • Works under pressure as well as under vacuum • Directly representative sample | • Max viscosity = 2,000 Cp |