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SCR Power Plant Control Valve

Controlling the pressure of ammonia can be challenging considering its caustic nature. But when it comes to reducing power plant emissions, the challenge must be met. The Burling Valve SCR Power Plant Control Valve provides reliable and repeatable pressure control with 'ammonia compatible' components and easy inline maintenance features. 

What is Ammonia?

Ammonia is a colorless gas that is lighter than air with a pungent, suffocating odor. It is highly caustic and both toxic and flammable. Ammonia is manufactured by synthesis from nitrogen and hydrogen. Common compounds include anhydrous ammonia, liquid ammonia and ammonia hydroxide.

80% of the ammonia produced in the US is for the agriculture industry. This gas is also used in fertilizers, plastics, explosives, pharmaceuticals, metal treating, refrigerants, cleaning agents and more. Ammonia is typically stored at low temperatures (-28F to -37F) or high pressures (200-300 PSIG) in order to keep the chemical in a liquid state, for shipping and storage cost reduction.



SCR Power Plant Control Valves used in Ammonia Service

  • Must be cleaned of greases and oils that may come into contact with the media (Oxygen Cleaned)

  • Typical Body Materials:

    • Carbon Steel and Stainless Steel (Preferred)

  • Recommended Seat/Seat Material: TFM1600, EPDM, PTFE and RTFE

  • Stainless Steel diaphragms are recommended.

Materials NOT Compatible with

SCR Power Plant Control Valves used in Ammonia Service

  • Bronze, Cast Iron, Buna, Viton and Polyurethane

SCR Power Plant Control Valve


The Selective Catalytic Reduction Process

SCR (Selective Catalytic Reduction) is a process used by coal and gas burning power plants to reduce nitrogen oxide (NOx) emissions. Ammonia is injected and used as the reducing agent. SCR is a post-flue treatment that can reduce NOx by up to 95%. Essentially, the ammonia comes into contact with the NOx and turns it into nitrogen and water. 

The Burling Valve SCR Power Plant Control Valve accurately controls the

pressure of the ammonia during the injection process. 

Selective Catalytic Reduction is regulated (and mandated) by the EPA. If the SCR system is not functioning and NOx is not being reduced, the EPA will fine the plant thousands of dollars per hour, until the system is back up and running.

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