+44 16973 51027 (UK) |
| |

Low Pressure Treatment Systems

Equipment for the treatment of timber to be use for indoor applications (Use Class 1 & 2)

Low Pressure Treatment Systems - Duration (Up to 2 hours) Charge Duration
Up to 2 hours
Low Pressure Treatment Systems - Productivity (From 6000m³) Throughput per Year
From 6000m³
Low Pressure Treatment Systems - ood Type (Upper floor joists, truss rafters, tile battens and CLS framing) Commodity Examples
Upper floor joists, truss rafters, tile battens and CLS framing
Low Pressure Treatment Systems - Treatment Type (Water or solvent based) Treatment Type
Water or solvent based
Low Pressure Treatment Systems - Class Type (1 & 2) Class Type
1 & 2
Home | Products | Low Pressure Treatment Systems

Low pressure Impregnation

For over 20 years Timber Preservation Technologies have designed built, tested and commissioned many innovative timber treatment plants that utilise cutting edge engineering technologies.

Our experience allows us to supply you with the technology to utilise the latest generation of water-based preservatives for wood preservation. 


When to use Low Pressure treatment?

You should only use low pressure treatment when the timber is going to be used indoors. This relates back to the Use Class system, and you can see the classes below which are relevant to low pressure treatment: –

Use Class 1 – Suitable for internal timbers that will remain dry. E.g. upper floor joists and truss rafters

Use Class 2 – Suitable for internal timbers that are exposed to a slight risk of wetting or damp. E.g. tile battens and CLS framing

Low pressure treatment generally uses only atmospheric pressure and a water based treatment which helps to protect it against fungi and wood destroying insects.


Treatment VesselØ1.2m – Ø3.6m / 1.4m Wide x up to 3.0m High
Treatment Vessel Length6.0m – 30.0m (Single Piece)
PressureFull vacuum to up to 3bar g
LayoutStorage Tank Below
Storage Tank Above
Storage Tank to Side
Multiple Storage Tanks
Storage TanksHorizontal Rectangular
Horizontal Cylindrical
Vertical Cylindrical
Vacuum SystemSingle Pump
Double Pump
Triple Pump
Fluid Transfer SystemVacuum Fill & Gravity Empty
Vacuum Fill & Pump Empty
Vacuum Fill & Air Pressure Empty
Pump Fill & Gravity Empty
Pump Fill & Pump Empty
Pack ClampingHydraulically Operated
BundSteel Bund attached to Storage Tank
Fully independent Steel Bund
Timber Handling SystemSingle Elevated Rail Track
Single in Ground Rail Track
Double Transfer Car Rail Track
Lay by System – Manual, Semi Automated or Fully Automated
Mixing SystemTo suit all preservative suppliers’ requirements
Control SystemOptiTreat
From any preservative supplier as required

  1. Timber charge is sealed in the treatment vessel
  2. Vacuum applied causing timber cells to be evacuated of air
  3. Vessel is flooded while the vacuum is maintained
  4. Preservative is forced into the timber under atmospheric pressure
  5. Vessel is emptied
  6. Vacuum applied to the timber again to evacuate left over preservative
  7. Left over preservative is recovered to the storage tank
  8. Timber charge removed from treatment vessel

All equipment can be supplied either Ex-Works or Fully Installed, whichever works best for you. We have access to a wide network of transport, crane and plant hire providers to allow us to achieve even the most complicated of installations.

We also have our own lifting equipment including the following: –

  • Reachstacker capable of lifting 45T
  • Wheeled Hydraulic Lifting Frame capable of lifting 80T
  • 2no. 10T Fork Lift Trucks

Any of these can be transported to site if the job requires it.


For more information or to get a quote call us on +44 (0)16973 51027 or email info@timbertreatmentsolutions.com


Get in touch for more information or to get a quote


Case Studies – Coming Soon

The importance of effective and environmentally sustainable wood preservation methods cannot be overstated. Our many years in the industry (under the Tweddle Engineering brand) led to the development of a range of wood preservation techniques, and some brand new, award winning timber treatment technologies! The importance of timber treatment is unlikely to wane so learn how our innovative wood treatment technology solutions benefited these companies!

This site uses cookies.
Read our privacy policy

This site uses cookies for marketing, personalisation, and analysis purposes. You can opt out of this at any time or view our full privacy policy for more information.