I am facing issue at choosing the correct flow control valve with better control at lower ranges. The fluid is argon.

Here are the two offers I have :

Need your kind guidance and support to select correct valve which gives me better control at lower ranges.

Thanks

 

Valve 1 (V726 DCVNS) is more suited for better control at lower flow ranges due to its lower kvs value (0.4 m³/h), smaller seat size (4 mm), and modified equal percentage flow characteristic.

 

Valve 1 (V726 DCVNS) is more suited for better control at lower flow ranges due to its lower kvs value (0.4 m³/h), smaller seat size (4 mm), and modified equal percentage flow characteristic.

Thanks for your response. But doesnt seat class 6 has a better control than class 4 ???

 

A Class 6 valve gives better shut-off (no leakage). It is beneficial for applications where isolation is critical.
Class 4 valves, while not as tight during shut-off, are still widely used for standard control applications. Your goal is better control at lower ranges of argon flow. I don't think class 6 is crucial here.

 

Thank you so much for your kind guidance.