Ammonia-Urea-Melamine Plants (Urea Service)

More than 90% of world industrial production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use.

While over 90% of urea produced is used as a fertilizer, it has other uses, which include the manufacture of the melamine, used in melamine-methanal resins.

Ammonium carbamate (an intermediate in urea synthesis) is a highly corrosive liquid.

PARCOL’s 1-4800 series high pressure, split body, angle control valves have one-piece upper body obtained from forged block of specialty stainless steel. Integrating the bonnet and body, flanged connection and dead zones are avoided, eliminating a cause for corrosion since carbamate strengthens its corrosive action particularly in these zones due to the failure of oxygen protection (passivation).

Materials are adequate for urea and carbamate fluids and comply with the material specifications for this service of main Licensors such as Snamprogetti, Stamicarbon, Urea Casale and others.

PARCOL’s 1-4800 series streamlined flow design, lenticular coupling between body and seat without the use of any gasket, one-piece plug and stem construction, special packing design and the use of particular trim materials, tested on various plants for many years, are the main features which make PARCOL urea control valves the best in quality and performance.