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TN Nexa Series

TN Nexa Series

TN Nexa Series

Product catalog summary
Overview: The document provides technical specifications for the SEKO S.p.A. TN0 316L Dosing Pump, part of the nexa series, which includes hydraulic double diaphragm dosing pumps. These pumps are designed in compliance with API 675 standards, ensuring a heavy-duty design, high safety, and rigorous performance controls. They are suitable for use in classified areas due to ATEX compliance.
General Specifications:
  • Low noise integral gearbox with worm type, oil bath lubrication.
  • Energy-efficient design with low friction rolling bearings.
  • Flexible mechanism allowing different piston speeds on the same group.
  • Micrometric stroke length adjustment, both manual and automatic.
  • Automatic stroke length variation via electrical servomotor, pneumatic actuator, or frequency converter.
  • Linearity and repeatability in compliance with API 675 standards.
  • Easy installation of electrical servomotor on manual stroke adjustment mechanism.
Diaphragm Pumphead Features:
  • High capacity flexibility with easy volume changes by replacing the piston cartridge.
  • Simple spare parts replacement with a 'one cartridge' solution.
  • Maximum compatibility with PTFE diaphragm.
  • Visual or remote diaphragm failure detection.
Technical Characteristics:
  • Flow rates range from 0.22 to 19.0 lph at 50Hz.
  • Maximum pressure of 120 bar.
  • Operating ambient temperature between -10°C and +40°C.
  • Maximum altitude of 1000 meters above sea level.
  • Fluid operating temperature from -10°C to +70°C.
  • Viscosity up to 1000 cP, with higher on request.
  • Stroke adjustment during operation from 0 to 100%.
  • Accuracy of ±1% on the turndown ratio of 10:1.
  • Built-in overpressure valve and high suction capability with a minimum NPSHr of 3 mwc.
  • Double diaphragm with rupture diagnostics and a diaphragm lifespan of up to 20,000 hours.
  • Multihead solutions available, up to six heads.
  • Compliance with API 675, CE marking, and ATEX II 2 G c IIB T4 standards.
  • Protection rating of IP 55 and epoxy painting at 125 microns.
Hydraulic Characteristics: The document includes detailed performance data for various pump models, specifying flow rates, pressures, and motor specifications at different frequencies (50Hz and 60Hz).
Physical Dimensions and Weights: The document provides dimensions and estimated weights for different pump models, along with allowable loads on pump nozzles and electric motor specifications.
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Catalog excerpts

TN Nexa Series-1

| SEKO S.p.A. TN0 316L DOSING PUMP nexa SERIES-Hydraulic Double Diaphragm Technical data can be changed without notice. TD_TN0_SS_rev.2.2 1 of 4 nexa series includes plunger and hydraulic diaphragm dosing pumps designed in compliance with API 675 Standards; the conformity to the API Standards implies a “heavy duty” design, high safety and severe controls of the performances during the tests. The broad variety of heads execution offers a wide selection of dosing pumps to cover practically any application needs. In addition the full compliance with the ATEX European Directive gives the possibility to install these pumps in classified areas too. Mechanism Available in different sizes, they are mechanical return type, giving the maximum reliability in all working conditions. General Specifications: „h Low noise integral gearbox, worm type, oil bath lubricated „h Reduced energy consumption based on low friction rolling bearings design „h High flexibility multiple mechanism solution to permit different piston speeds (SPM) on the same group „h Micrometric stroke lenght adjustment both manually and/or automatically actuated. „h Automatic stroke length variation by electrical servomotor, pneumatic actuator or frequency converter „h Linearity and repeatability in compliance with API 675 Standards. „h Easy “on field” installation of electrical servomotor on manual stroke adjustment mechanism. Diaphragm Pumphead „h High capacity flexibility„³ On site easy volume changing by changing the piston cartridge „h Easy to change spares parts (all “one cartridge” solution). „h Maximum compatibility PTFE diaphragm „h Visual or remote diaphragm failure detection Technical characteristics „h Flow rates: from 0,22 to 19,0 lph @ 50Hz „h Max Pressure: 120 bar „h Ambient temperature: -10 °C + 40 °C „h Max altitude: 1000 m (A.S.L.) „h Fluid operating temperature: -10 °C + 70 °C „h Viscosity up to 1000 cP (Higher on request) „h Stroke adjustment during operation from 0 to 100% „h Accuracy ± 1 % on the turndown ratio 10:1 „h Built-in overpressure valve „h Min NPSHr: 3 mwc „³ High suction capability „h Double diaphragm and diagnostic of the rupture „h Diaphragm duration up to 20.000 hours, depending of the application „h Multiheads (up to six) solutions „h API 675 compliance „h CE marking „h ATEX II 2 G c IIB T4 compliance „h Protection: IP 55 „h Epoxy painting at 125 micron

 Open the catalog to page 1
TN Nexa Series-2

| SEKO S.p.A. TN0 316L DOSING PUMP nexa SERIES-Hydraulic Double Diaphragm Technical data can be changed without notice. TD_TN0_SS_rev.2.2 2 of 4 PUMP KEY CODE

 Open the catalog to page 2
TN Nexa Series-4

| SEKO S.p.A. TN0 316L DOSING PUMP nexa SERIES-Hydraulic Double Diaphragm Technical data can be changed without notice. TD_TN0_SS_rev.2.2 4 of 4 Allowable loads referred to pump nozzles Fx 0.10 KN Mx 0.04 KNm Fy 0.12 KN My 0.04 KNm Fz 0.10 KN Mz 0.04 KNm DIMENSIONS [mm] EXTIMATED WEIGHT PUMP MODEL A B C D Kg (without motor) 1T06N02FC.. BSPP 1/4"F 144 144 282 30 1T08N02FC.. BSPP 1/4"F 144 144 282 30 1T10N02FC.. BSPP 1/4"F 144 144 282 30 1T12N02FC.. BSPP 1/4"F 149 149 279 30,5 1T15N02FB.. BSPP 1/4"F 126 126 279 30,5 1T20N02FB.. BSPP 1/4"F 149 149 279 30,5 Electric motor size 2 Poles Kw 4 Poles...

 Open the catalog to page 4

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