Plastic trays
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 |