Since 1975 OBL achieved a major breakthrough: a non-loss motion mechanism (our L and X9 series).
This means that adjustment is step less, smooth,
precise and without backslash.

The OBL mechanical diaphragm has plunger like
performance with extreme durability.

UXL-UXLB-UXLC are the only hydraulic
diaphragm pumps, having a mechanically actuated
replenishing system (all our competitors have
replenishing via pressure differential).

UXR are the only loss motion hydraulic diaphragm-metering pumps with mechanically actuated replenishing.

X9 has a seal less ceramic plunger. With an
extremely low volume hydraulic oil replenishing
system, and ceramic valve seat and ruby valves.

The X9 is the most accurate and reliable double hydraulic diaphragm process pump on the market