Forged ASTM B564 UNS N04400 Monel Check Valve

Falcon Forged Monel 400 (UNS N04400) Check Valves are the definitive "backflow prevention" solution for high-salinity and acidic environments. In these critical services, a check valve must be reliable; if it fails to close, the resulting backflow can destroy expensive pumps or cause hazardous chemical leaks.

Falcon manufactures Monel check valves in several configurations to handle different flow velocities, pipeline orientations, and media viscosities.

The most common choice for small-bore high-pressure piping.

• Mechanism: Uses a forged Monel piston that is lifted by the fluid pressure.

• Best For: High-pressure gas or liquid service.

• Falcon Specialization: Typically spring-loaded to ensure fast closure in vertical or horizontal lines and to prevent "water hammer."

Designed for systems where "Full Flow" and minimal pressure drop are the priority.

• Mechanism: A hinged Monel disc swings open with forward flow and is forced shut by gravity and back-pressure.

• Best For: High-volume liquid systems with low-to-medium pressure.

• Falcon Specialization: Features an internal hinge pin design to eliminate external leak paths, a critical safety feature for HF acid service.

The ultimate design for viscous fluids or "dirty" service.

• Mechanism: A free-rotating Monel ball acts as the sealing element.

• Best For: Applications with particulates or high viscosity where a piston might get "stuck."

• Falcon Specialization: The ball rotates during operation, ensuring even wear and a constantly refreshed sealing surface for longer life.

A specialized "hybrid" valve used in power and steam systems.

• Mechanism: Functions as a check valve automatically, but can be manually closed using a handwheel (like a globe valve) to isolate the line entirely.

• Best For: Boiler feedwater systems and high-pressure steam.

Falcon’s expertise in Monel forging allows us to offer these valves with specialized construction methods:

• Bolted Cover (BC): The standard design for easy internal maintenance and cleaning.

• Welded Cover (WC): A "leak-proof" design where the cover is seal-welded to the body—preferred for lethal gas or HF Alkylation service.

• Pressure Seal Cover: Used for Class 1500 and 2500 high-pressure applications where the internal pressure helps tighten the seal.

In industries like desalination or HF Alkylation, the check valve's internal trim is under constant attack. Falcon uses Monel K-500 for the springs and seat overlays to provide the extra hardness required to resist erosion and fatigue, ensuring that the "heart" of your piping system remains secure.

Every Falcon valve must pass a multi-stage testing sequence before it is certified for shipment.