Sundyne Pumps at Maxam-Chirchiq JSS Carbamide Plant

Since 2002 company ENCE GmbH renders engineering services and carries out integration of the pumps to existing lines at Maxam-Chirchiq JSS.

Our company supplied 38 high-speed single-stage centrifugal pumps of LMV series and auxiliaries for Carbamide production plant. Piston pumps, which operated the plant, were morally and physically outdated. Wear of equipment resulted in gas-polluted air, oil leakage and low efficiency of the plant. Our experts made replacing of all piston pumps to Sundyne high-speed pumps. The system of control and regulation had been changed also. Such modernization was carried out at the chemical manufacturing for the first time.

In the carbamide plant were installed and set up pumps of series LMV-341 Z, LMV-322, LMV-806. In particular, we applied a unique consecutive installation of two pumps LMV-341Z for handling of ammonia and carbamate solution with outlet pressure 200 bar and flow rate 40 m³/h.

In 2002, the group of mechanics of the carbamide plant had an internship at a Sundyne factory in Dijon, France.

Maxam-Chirchiq JSS is one of the largest producers of mineral fertilizers in Uzbekistan. It produces ammonia, urea (carbamide), ammonium nitrate, ammonium sulfate, mixed nitrogen-phosphorus fertilizers, urea-ammonia mixture, ammonium carbonates, nitric acid, amino-formaldehyde resin, carbamide resin, ammonia synthesis catalysts, carbon oxide conversion catalysts, nickel and chromia-alumina catalysts.

Total upgrades:

• 1. Despite the fact that the centrifugal pumps have 10-15% lower efficiency than piston pumps, centrifugal pumps have a number of undeniable advantages, as a result of modernization of carbamide plant got a significant reduction in operating costs:
  • Centrifugal pumps have direct drive, therefore they are compact and manufacture and installation costs as well as operating costs are significantly lower than those of piston pumps.
  • Centrifugal pumps are most suitable in cases when you want high capacity with a relatively small head, i. e. for the most chemical productions.
  • Centrifugal pumps are better suited for pumping liquids containing suspended solids, as these pumps are missing cloggy valves.
  • Due to the large gaps in the designs of centrifugal pumps compared to piston pumps, they are subject to less wear from abrasive particles present in pumped fluids. Special design of centrifugal pumps allows passage through the pump of large solid particles that is excluded in piston pumps.
  • The simplicity of the design of centrifugal pumps makes it easier to produce them from chemically resistant hard melting and hard-to-handle materials.
• 2. Sundyne pumps are manufactured in accordance with the list of uniform standards to ensure the required production data, cost effectiveness and simplicity of details. All pumps delivered to the plant meet the uniform standards - mechanic able to exploit small pumps, can manage with the large ones.
• 3. Full refusal from repair crew services.
• 4. Reduction of gas contamination in the rooms. The piston machines due to their design features were permanent ammonia passes.
• 5. Maintaining technology requirements and improving the quality of carbamide.

Today, our Uzbek specialists carry out pump maintenance and personnel training. Expansion of the Sundyne pump and spare parts park is planned.