Valves for chemical plants: materials and safety
In a chemical plant the valve’s first job is to keep aggressive or toxic media in. Selection starts with the material, not the price.
TAZ Engineering Team · · 6 min
Materials
Carbon steel suits neutral media; acids and alkalis need stainless steels, special alloys or lined valves. Selection follows corrosion resistance tables for the actual concentration and temperature.
Sealing
The stem packing is the weakest point. Hazardous media call for bellows-sealed valves or upgraded packing with fugitive emission control. Flange gaskets are chosen for the medium.
Safety
Fire-safe designs for flammable media and explosion-proof actuators for hazardous areas. A passport, material certificates and test records are mandatory.
How to order
State the medium and concentration, temperature, pressure, hazard class and emission requirements. TAZ engineers will tell you which items we can build and which need a specialist design.
Checklist
- medium and concentration
- temperature and pressure
- body and trim material
- stem seal type
- fire-safe design
- explosion-proof actuator