Fractional analyzer

DEVICE TYPE: DPA-4.5 in-line fractional analyzer



  • Measured parameters: fractional composition (beginning and end of boiling, percentage / temperature of distillation) to control the production process and control the composition during mixing
  • Sample type: gasoline, diesel fuel, aviation and jet fuel, raw materials for processing for petrochemical processes (naphtha), fuel oils, intermediate oil products, hydrocarbons with a maximum final boiling point not exceeding the limit of thermal decomposition
  • Compliance with standards: fully complies with ASTM D86, EN ISO 3405, GOST 2177
  • Measuring Range: 0-100% / 0-400 ° C
  • Accuracy: according to MVI
  • Measurement cycle time: 35-45 min (full distillation cycle), 10-15 min (accelerated distillation cycle)
  • It is entered in the State registry of SI of the Russian Federation No. 57636-14


  • Explosion protection: 1ExdIICT4 / 1Expx [ia] IICT4 Certificate of Conformity No. TC RU C-DE.GB04.V.00168
  • Sample temperature: 0 ... 40 ° C (viscosity <50 cSt)
  • Pressure and flow rate: 1 ... 3 atm, 10 ... 40 l / h
  • Signal Outputs: 4-20 mA, Modbus, Ethernet
  • Power Supply: ~ 220/240 V, 50 Hz, 600 W
  • Technological support: cooling water 0 ... 20 ° C, 20..60 l / h, 2-3 atm (it is recommended to use a closed circulation system of cooling type FKS); KIP air - 4-6 atm, 1 m3 / h; nitrogen - 4-6 atm, 2 l / h
  • Installation method and conditions: installation on a frame, operation at an ambient temperature of 5 ... 40 ° C, protection class IP 54
  • Management: embedded PC with Windows XP and PACS software or from a remote station
  • Dimensions and weight: 1200х2250х710 mm, 325 kg

100 ml of the sample are distilled off in an open flask in an atmosphere with nitrogen for a pre-programmed heating time. The evaporated sample passes through a water-cooled condenser. The volume of condensate is measured in a graduated receiver by means of a differential pressure measuring system with density compensation at predefined (programmable) points of percent distillation (volume of the distilled product).

For light products, an explosion-proof circulating cooling system is used to maintain the inlet sample temperature and the condenser temperature below the initial boiling points.

For heavy products, the condenser temperature is maintained in proportion to the boiling range in order to avoid clogging of the lines. The sample in the flask is mixed with nitrogen, thus reducing the risk of slowing down the distillation, ensuring fast and homogeneous heating of the sample and reducing coking at the bottom of the flask. There is an option to take measurements at low pressure.

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