Tehran Zist & Hamkaran is a

- Member of Iranian HVAC Society
- Member of water and wastewater treatment syndicate
- Member of Iranian syndicate of mechanical electrical & industrial contractors (ISMEIC)

 Our fields of activities are:

Feasibility and treatability studies

Design and preparation of technical and drawing documents

Manufacturing and fabrication of the following units:
- Neutralization and PH adjustment
- Aeration
- Coagulation and flocculation
- Clarification
- Filtration
- Adsorption
- Disinfections
- Biological treatment systems
- Oil separation
- Membrane technology

Manufacturing :
- Heat Exchangers
- Pressure Vessels
- Tank Heaters
- Domestic and Industrial Deaerator