Monel Check Valves

Material Of Monel Check Valves

Monel alloy is a Nickel alloy material with the addition of:

• Copper (Cu) 

• Silicon (Si) 

• Manganese

These materials are also known as Monel Alloy 400 and Monel Alloy K500

Material Features: 

Monel alloy has an excellent anti-corrosion performance in the reducing acid medium, especially have excellent corrosion resistance in high-temperature hydrogen fluoride and hydrofluoric acid solution, and resistant to any density of hydrofluoric acid solution corrosion. Mainly applies in high-temperature hydrogen fluoride gas and hydrofluoric acid solution condition, and its corrosion resistance is better than copper-based alloys when used in seawater.

Monel alloy has an excellent anti-corrosion performance in the reducing acid medium, especially have excellent corrosion resistance in high-temperature hydrogen fluoride and hydrofluoric acid solution, and resistant to any density of hydrofluoric acid solution corrosion. Mainly applies in high-temperature hydrogen fluoride gas and hydrofluoric acid solution condition, and its corrosion resistance is better than copper-based alloys when used in seawater.

Cautions Of Monel Check Valves

• Ease of manufacture: trade-off between castability and weldability 

• Pitting can be a problem at low velocities 

• Don’t be used as the trim of austenitic stainless valves

• P/T rating class 300=600 psi CWP 

• Cost effectiveness need consideration

Application Of Monel Check Valves

• Petrochemical plant

• Refinery

• Power plant

• Water treatment plant

• Marine exploitation 

Additional Uses & Comments Of Monel Check Valves

• Variety of wrought/ bar specifications available, good for trim material. Excellent strength from K500 

• Reasonable castability with the suitable design and higher Si content 

• Weldable with lower Si content 

• Excellent for hydrofluoric & other acids (Exclude nitric acids) 

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