ProMinent GmbH

- Model API 674 - Process Hydraulic Diaphragm Metering Pump

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Capacity range per pump head: 3 – 7,400 l/h, 400 – 8 bar. The hydraulic diaphragm metering pump Orlita Evolution API 674 is characterised by a PTFE multilayer diaphragm with integral diaphragm rupture warning and by its unique diaphragm position control. For critical and heavy Industrial applications and when meeting exacting safety requirements.

Maximum process reliability in accordance with API 674.
Orlita Evolution hydraulic diaphragm metering pumps ER1a, EF2F, EF3F and EF4F form an integrated product range with stroke lengths of 15 to 40 mm. This covers the capacity range from 3 to 7,400 l/h at 400 – 10 bar. A wide range of drive versions is available, including some for use in Zone 1 or Zone 2 areas at risk from explosion with ATEX certification. The Orlita Evolution product range is designed to comply with API 674.

Maximum process reliability:

  • PTFE multi-layer diaphragm with integral diaphragm rupture warning system
  • Integral hydraulic relief valve
  • The new diaphragm position control protects against impermissible operating statuses (e.g. no damage in the event of a blockage on the suction or discharge side)
  • Metering reproducibility is better than ± 1% under defined conditions and with proper installation
  • Continuous bleeding of the oil chamber ensures reliable operation

Excellent flexibility:

  • The modular and compact construction with single and multiple pump versions permits a wide range of applications. In multiple pump systems up to 5 metering units can be combined, including units with different pump capacities

Field of application

  • Oil and gas industry
  • Metering of reactants and catalysts in the chemical industry
  • Volume-proportional metering of chemicals/additives in the treatment of boiler feed water
  • Level-dependent metering of auxiliary agents in industrial production engineering, for instance hot wax metering in the production of adhesive strips

Technical Details
  • Stroke length: 16 mm (Evo 1, Evo 2), 25 mm (Evo 3), 40 mm (Evo 4)
    Rod force: 2,600 N (Evo 1), 6,200 N (Evo 2), 9,000 N (Evo 3), 18,000 N (Evo 4)
  • Metering reproducibility is better than ± 1% under defined conditions and with proper installation
  • PTFE multi-layer diaphragm with electrical diaphragm rupture warning system via a contact
  • Integrated hydraulic relief and bleed valve
  • Wetted materials:
    Stainless steel 1.4404, special designs available on request
    plastics PVC, PVDF, special designs available on request
  • A wide range of power end versions is available: Three-phase AC standard motors also for use in areas at risk from explosion, different flange designs for use of customer-specific motors
  • Degree of protection: IP 55
  • Design in compliance with API 674 among others



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