✔️ Pre-Sales Services:
Delivery Time: 4 working days (subject to coordination with sales experts)
To confirm price and availability, please call +982188822550 ext. 121.
In general, the DamaTajhiz semi-automatic FRP water softener with 400,000 grains capacity is designed to remove suspended minerals and dissolved salts from the water used in building heating and cooling systems.
Unstable calcium and magnesium ions, resulting from calcium and magnesium bicarbonate salts in the water, turn into stable calcium carbonate and magnesium carbonate sediments when heated. These sediments accumulate on heat exchange surfaces in heating and cooling systems. The formation of these deposits on surfaces such as air handling unit coils, fan coils, chiller condensers and evaporators, internal surfaces of cast iron boilers, steel boiler tubes, and heat exchangers significantly reduces heat transfer efficiency. Therefore, to prevent scaling, it is necessary to use appropriate types of resin or ion exchange water softeners to eliminate these harmful minerals and deposits
The semi-automatic resin water softeners manufactured by DamaTajhiz Engineering Company are offered in various capacities with excellent quality, golden warranty, and full after-sales support—providing superior features compared to similar products in the market.

DamaTajhiz: Thousands of Products for Thousands of Projects (Since 2004)
In semi-automatic resin softeners, backwash and regeneration operations are manually performed by the boiler room operator at regular intervals. In contrast, fully automatic softeners carry out these processes automatically based on flow or time settings, without the need for an operator.
Required Water Softener Capacity (in grains) = (Water Hardness in PPM) × (Water Flow Rate in GPM) × 60 × 24 ÷ 17.1
Therefore, when purchasing a semi-automatic resin water softener by DamaTajhiz, after determining the project's water consumption and measuring the water hardness (using test kits or specialized tools), the required capacity can be accurately calculated using the above formula.

![]() |
![]() |

|
Model |
DT.W.S 450 Manual |
DT.W.S 450 P Auto | |
| Maximum capacity (Grain) | 450000 | 450000 | |
| Maximum resin volume Lit | 400 | 400 | |
| Valves and joints size (In) | 1½" | 1½" | |
| Softener maximum flow rate G.P.M | 83 | 83 | |
| Mineral tank Lit | 500 | 500 | |
| Softener dimensions (cm) | Height | 150 | 150 |
| Diameter | 80 | 80 | |
| Price | - | - | |
Head Office: No. 463,Talebian Alley,Taleghani St.Tehran,Iran


DamaTajhiz has provided the opportunity to sell and ship specialized HVAC equipment for applicants in the following countries as the first and the most popular online store for selling HVAC equipment (Heating , Ventilation , Cooling , Air conditioning) in the Middle East : Afghanistan – Tajikistan - Uzbekistan – Turkmenistan – Azerbaijan – Armenia – Georgia – Turkey – Iraq – Syria – Jordan – Kuwait – Emirates – Qatar – Oman.