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Urea

Greater valve wall thickness and proprietary coating on ball and seats combat corrosion in urea production.

MOGAS CA-1AS valves reliably and safely operate to produce urea from ammonia and carbon dioxide.

Also known as carbamide, urea is a colorless, odorless, non-toxic solid organic compound that is highly soluble in water.

Essentually, it is the waste produced when the body metabolizes protein. In the manufacturing process, urea is produced from ammonia and carbon dioxide, and used for fertilizer-related products, usually in the form of granules, prills or crystals. Since it contains nitrogen, it is an effective feed additive that can aid animal growth. 

In manufacturing, as urea is formed it coats metallic parts and needs to scraped or the valve's sealing effectiveness is compromised. Ammonia carbamate is also highly corrosive, and as temperature is increased for higher urea yields, there is potentially a higher risk of corrosion and leakage. Ammonia or ammonium carbamate leakage to atmosphere would cause serious environmental and safety problems.

MOGAS valve designs offer:

  • forged body and end connections with greater wall thickness in critical areas
  • sharper leaning edge on seat to scrape ball surface for repeatable tight isolation
  • metal seats that wipe sealing surface of ball clean during operation
  • greater sealing contact area
  • dual-guided stem design and live-loaded packing to prevent stem packing leaks and risk of fugitive emissions
  • application-specific coatings that provide enhanced erosion and corrosion resistance
Typical Operating Conditions:
  • Temperature: 50 – 400° F (10 – 200° C)
  • Pressure: 50 – 3000 psig (3.4 – 206.8 bar g)
  • Sticky, hard urea product coating
  • Extreme corrosion
  • High-pressure steam

Urea Process Flow Diagram
  1. Low Pressure Liquid Ammonia
  2. Low Pressure Carbon Dioxide
  3. High Pressure Liquid Ammonia
  4. Carbon Dioxide Compressor
  5. Carbon Dioxide Cooler
  6. Urea Reactor
  7. Separator
  8. Condenser
  9. Liquid Recycle Carbamate
  10. High Pressure Decomposer
  11. Low Pressure Decomposer
  12. Condenser
  13. Evaporator
  14. Crystallizer
  15. Dryer
 
  • Heat Exchanger (not shown)
  • General Ball Valves (not shown)