VALVE PIGNONE SUD TYPE 1500/B ANSI 900 CONNECTION BW

industrial control valve:
Type: Pneumatically actuated valve (uses compressed air to open/close).

ANSI 900: Pressure class rating → designed for high-pressure service.
DN 4" x 6": Nominal sizes, typically refers to inlet/outlet dimensions.
BW (Butt Weld) connection: Indicates it is welded directly to the piping system (common in high-pressure, high-temperature service to avoid leaks).

Typical Uses:

Power plants 
Oil & gas facilities (refineries, pipelines, petrochemical plants).
High-pressure steam, water, or gas service.
Industrial process plants where automated flow control is needed.

Since it’s pneumatically actuated and rated for ANSI 900 pressure, it’s meant for critical, high-pressure applications where reliable remote/automatic operation is required.