Single Pig System
The Single Pig System
Demonstration and Overview
Here’s an animation of a straightforward single-pig liquid pipeline product recovery (pigging) system.
A single-pig system is the most common type of system. Normally the product source is pumped from the source to the destination. The destination can be either a filling machine or another storage vessel for the product.
Single-pig systems usually include a pig launch station and a pig return station. In this system the normal position for the Pig is in the pig housing at the launch station.
How a Single Pig System Works
In this video, the product being pumped is represented by the red colour, and the propellant represented by the yellow colour.
When the line needs to be pigged, product transfer is stopped and the valves in the launch station are changed to allow the pig to be driven to its destination using a suitable propellant. Once there, propellant is introduced at the receive station to return the valve to the pig housing. The system can be installed to recover product to the filler / destination tank or to send product back to the source tank.
HPS are the world’s leading specialists in hygienic (sanitary) and process pigging, so for further information, or if you have any questions, simply get in touch