Urea

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

Low Pressure Liquid Ammonia
Low Pressure Carbon Dioxide
High Pressure Liquid Ammonia
Carbon Dioxide Compressor
Carbon Dioxide Cooler
Urea Reactor
Separator
Condenser
Liquid Recycle Carbamate
High Pressure Decomposer
Low Pressure Decomposer
Condenser
Evaporator
Crystallizer
Dryer

Heat Exchanger (not shown)
General Ball Valves (not shown)