Advanced By-Pass Pig

The Pigtek Advanced By-Pass Pig is fitted with a number of internal by-pass valves, which are set to open at a pre-specified pressure.

This type of pig is intended for use in un-pigged pipelines or dirty pipelines where large quantities of debris may be present. It has also been used very successfully for removing lost or stuck pigs.

The pig performs like any other pig until such time that an accumulation of debris builds up in front of the pig, or the pig encounters a restriction. This causes the differential pressure across the pig to increases until the by-pass valves open. A 360 degree jet of product then flows through the valves to flush any debris away.

Once the differential pressure is lowered, the by-pass valves close and the pig can continue to traverse the pipeline. If the pig has encountered a restriction that prevents it from travelling any further, product will continue to flow through the pig preventing a complete pipeline blockage.

Pigtek Advanced By-Pass Pigs are available in sizes from 4in. through to 56in.