Plastics Cask Lifespan and User Guidelines

The plastics casks, as supplied by Emmerald, are designed to be robust and meet the requirements of the brewing industry, eg they can be dropped from as high as two meters without denting or lasting damage. By following these user guidelines for handling, storage and transport of the casks, the damage to the casks will be minimised and the life expectancy will go beyond the minimum industry standard of seven years

  • Avoid using knives or sharp implements on the casks
  • Do not place on broken pallets or anywhere with nail heads exposed
  • Keep away from hot surfaces, naked flames or fires etc
  • Do not use for storing anything other than beers, ciders or other beverages at the pressures specified
  • Stack only on sound level surfaces
  • Although treated to withstand uv degradation for up to ten years, it is better to avoid stacking the casks in direct sunlight for long periods
  • Never put dissimilar casks in the same stack
  • The cask is made from high density, high molecular weight polyethylene which is chemically very unreactive. However, for health and safety considerations, do not use anything other than water based solvents on the casks.
    • Cask cleaning can be undertaken using the water based cleaning agents normally used with steel (acid and caustic) for the same temperature/time regimes. However, it is important that the cleaning chemical manufacturer’s recommendations are followed or revert to Emmerald with specific enquiries
  • Where the casks are unloaded by dropping, the cask should be dropped onto a drop pad to reduce possible damage
  • When moving full casks by hand, it is better not to drag the container across the floor but roll the container on the rolling hoops
  • Do not paint the casks
  • Apart from manual handling and filling, the casks can be used with various mechanised systems but please contact Emmerald Sales for advice.
  • Full casks can be stacked up 9 high(currently undergoing long-term testing)
  • After filling the shives should be tightened to 30N.m using the “driver” provided.
shiv torque correct
Tightening shiv to correct torque
Shiv in position
Shiv in position
Shiv with driver
Shiv with driver
  • Since the shive material can be recycled, please return finished shives to GPS
  • Care should be taken when removing the keystones not to mark the sealing faces of the caskNormally we recommend the use of plastic keystones
  • The maximum working pressure should be 2.5 bar ( normally, real ales do not often develop pressures above 1- 1 ½ bar)
  • Tapping the cask
    • When tapping the cask the tap should be forced in to about 20mm from the widest point on the taper. The keystone is forced against the keystone neck by the taper of the tap and, in turn, is gripped by the neck with considerable force. This force is sufficient to squeeze the keystone out of the neck by a small amount (c. 1mm or even more if over hit) but it is not detrimental to the performance of the cask.

Keg Tap