General features:

• Diaphragm, low cost, robust, compact metering pump.
• The mechanical diaphragm works both giving the swept volume, acting basically as plunger, and as separator between casing and the pumped fluid.
• Easy and minimum maintenance required, thanks to the reduced number of components.
• The OBL’s unique (patented) mechanical diaphragm design ensures linearity between flow rate and percentage of stroke. The flow rate is virtually uneffected by
the working pressure variations.
• Leak-free pump, due to OBL’s stress-proof diaphragm.
• High working safety:
  - No external moving parts.
  - Leak-free operations.
• Max suction lift 1,5 m.w.c. 
• Double and single valve ball.
• Suction and discharge connections both threaded and flanged (on demand).
• Max. suction lift 1,5 m.w.c. (see operating manual).
• Max. temperature of dosed chemical: 45 °C.
• ± 2% accuracy within 10 to 100% of the nominal flow rate