RVT Process Equipment GmbH supplies the following tray types in various plastics:
- Sieve trays
- Dual-flow trays
- Tunnel trays
The sieve trays are a very cost-competitive mass transfer tray but have a smaller operating range than that of valve trays.
The tunnel tray type is mainly used in applications with low liquid loadings and liquid sealings, and is a well proven solution for acid recovery applications and in cases where a stable liquid holdup is required.
Applications and properties of the plastics for trays:
|Designation||Properties||Resistance to||Upper working temperature|
|PVC||hard and stiff thermoplastic, used at moderate temperatures||Alkalis, acids, salt solutions, oils, greases, petrol, aliphatic hydrocarbons||approx. + 60°C|
|PE||tough, firm plastic, also used at minus temperatures, low water absorption||Alkalis, acids, salt solutions, many organic solvents like alcohols, ketones, ester||approx. +60°C|
|PP||hardness and stiffness higher than PE, but inadequate toughness at low temperatures, higher operating temperature than PE||Alkalis, acids, salt solutions we well as many organic solvents like alcohols, ketones, ester||approx. +80°C|
|PVDF||Fluoride-containing thermoplast, good resistance to heat and cold||Alkalis, acids, salt solutions, many organic solvents like alcohols ketones, esters, nitric acid, H2O2||approx. +120°C|
|PTFE||very good ability to withstand temperature, stiffness values reduced, high creep tendency||almost all chemicals||approx. +180°C|
|TFM||very good ability to withstand temperature, stiffness values reduced, high creep tendency, weldable||almost all chemicals||approx. +180°C|