DLC DN08 vs OCP UQDB06 — Flow Performance Comparison

DLC DN08 (Flat-face dry-break coupling)

Nominal flow diameter (DN): DN 8.0 mm
Kv (m³/h): 2.54
Cv (US gpm): 2.94
Max allowed flow: 50 L/min
Design / function: Flat-face, spill-minimized, easy manual connection
Flow performance: Higher Kv/Cv and lower pressure drop
Product application: Data center / semiconductor liquid cooling

OCP UQDB06 (OCP blind-mate quick disconnect)

Nominal flow diameter (DN): DN 9.5 mm
Kv (m³/h): 1.57 – 1.75
Cv (US gpm): 1.82 – 2.02
Max allowed flow: —
Design / function: Blind-mate, OCP-compatible, hot-swap oriented
Flow performance: Relatively lower Kv/Cv despite larger DN
Product application: Data center DLC, especially OCP-standardized blind-mate connections

Calculated flow comparison

0.5 bar → DLC DN08: 29.9 L/min / OCP UQDB06: 18.5 – 20.6 L/min
1.0 bar → DLC DN08: 42.3 L/min / OCP UQDB06: 26.2 – 29.2 L/min

Key takeaways

Even though UQDB06 has a larger nominal flow diameter, DLC DN08 shows higher flow efficiency
At the same pressure drop, DLC DN08 provides approximately 45–62% higher flow
UQDB06 values vary depending on flow direction and are optimized for blind-mate OCP applications