
Valves & Flanges
Flange Connection Standards: ANSI vs DN Designations
ANSI and DN are two distinct flange connection standards. ANSI uses inches for dimensions and defines pressure ratings by class. DN uses metric nominal diameter. Mixing
Compare valve types and flange designs to find the right solutions for flow control, isolation, and system connections.

ANSI and DN are two distinct flange connection standards. ANSI uses inches for dimensions and defines pressure ratings by class. DN uses metric nominal diameter. Mixing

Gate valves suit low flow, high torque, and full isolation in main lines. Ball valves suit quick shutoff, tight clearances, and frequent cycling. The choice depends on