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The first of its kind, the Welker Plug & Purge™ Automatic Purging System meets the latest recommendation of API 8.2 and ASTM D4177. Welker applied 25 years’ experience purging probe samplers to design the Plug & Purge™, which safely and effectively purges trapped liquid product from the sampler to the sample container. Incorporate the Plug & Purge™ into your automatic sampling system and increase your system’s accuracy.
Stop contamination concerns before they start with the Plug & Purge™. When sampling batches of crude oil with different properties or different owners, sample representativeness is critical to custody transfer integrity. The Plug & Purge™ uses inert gas to displace linefill into the sample container so that no samples remain in the system to contaminate the next batch.
The Plug & Purge™ delivers a double shot of a controlled volume of compressed inert gas to fully clear your sampler and system tubing in under a minute. By pushing these trapped samples to the sample container, the Plug & Purge™ ensures your composite sample is representative of the entire batch and that no samples remain to contaminate subsequent batches. Purge your system from the comfort of the control room when you connect the Plug & Purge™ to your sampling system’s Programmable Logic Controller (PLC).
Have confidence in your sampling system during normal operations and during proving. Use the Plug & Purge™ and know there is no water trapped in your sampler to skew the results of water injection tests.
Eliminate the human error and safety concerns of manual purge operations. The Welker Purge Cylinder clears your sampling system with the same necessary volume of compressed inert gas each purge cycle. Your inert gas won’t go to waste, and sample representativeness isn’t compromised by under-purging or over-purging.
Easily upgrade existing equipment or customize a new sampling system. On a standardized 20” x 20” panel with two types of mounting holes, the Plug & Purge™ can be installed where it’s most convenient for you—to a wall in a shelter or to a 2” pipe stand. An independent system, the Plug & Purge™ can be isolated for maintenance so you don’t have to incur the cost of interrupting sampling operations.
| Plug & Purge™ | |
|---|---|
| Materials of Construction | Materials of Construction 316/316L Stainless Steel, PTFE, Viton® |
| Inert Gas Inlet | 1/4" Tubing |
| Purge Outlet | 1/4" Tubing |
| Solenoid Input & Return | 1/4"Tubing |
| Utility Requirements | Inert Gas Supply for Purge Operation |
| Hydraulic or Pneumatic Supply (Optional): 50-116 psig | |
| Electrical Connection | Solenoid: 1/2" FNPT, AC 120 V |
| Pressure Transmitter (Optional): 1/2" FNPT, DC 24 V | |
| Volume | 25 cc Cylinder and 50 cc Purge |
| Dimensions | 20" x 20" x 1/4" (Length x Height x Width) |
| Operating Pressure | Actuation: 116 psig @ -20 °F to 120 °F |
| Downstream of Regulator: 1500 psig @ -20 °F to 120 °F | |
| Pneumatic: 2500 psig @ -15 °F to 120 °F | |
| Electrical Area Classification | NEC Class I, Div. 1, Groups A, B, C, & D, T3 |