The Auto Back Pressure Unit works with Scribner Associates’ 840, 850 and 890 Fuel Cell Test Systems for accurate, independent control and measurement of anode and cathode pressure through the FuelCell® software.

 

 

Featuresauto-back-pressure-unit

  • Automatic control of back pressure from 10 to 300 kPag (1.5 to 44 psig)
  • All stainless steel construction - regulators, condensate collection tanks, tubing and fittings
  • Dual channel with isolated flow paths & fan-cooled heat exchangers
  • High-precision, water-tolerant regulators and large flow paths
  • Accurate pressure control (±3.5 kPa or 0.5 psi) & stability from 0.1 – 10 SLM
  • Precision pressure transducers
  • Operation with gas with dew point up to 120 °C at 10 SLM
  • Flexible pressure control through FuelCell®
  • Independently control or balance anode & cathode pressure
  • Control excess gas flow during pressure increases
  • Maximum back pressure & differential pressure set points and alarm triggers
  • Program pressure profiles using Setup Fuel Experiment or Arbitrary Control Experiment
auto-back-pressure-unit-screenshot-thumb
Specifications
Back Pressure Control                                      10 – 300 kPag (1.5 – 44 psig)
Control Accuracy                                              ±3.5 kPa (±0.5 psi)
Range                                                              0 - 300 kPag (0 – 44 psig)
Measurement Accuracy                                     2.5 kPa (0.35 psi)
Time to achieve normal P-to-P Set-point              < 10 s
(when not flow rate limited)
Overshoot                                                          < 10 kPa (1.5 psi)
Flow Rate                                                          0.1 - 10 SLPM
Inlet Gas Temperature & Dew Point                     Up to 120 °C
Pilot Gas Supply                                                Clean, dry air or N2, 345-480 kPa (50-70 psi),  ≤0.8 SLPM
Dimensions                                                        33 W x 33 D x 64 H (cm), 13 W x 13 D x 25 H (inch)
Operating Temperature                                        5 - 35 °C
Power Requirements                                           100 - 240 V, 50 - 60 Hz, 2 A
auto-back-pressure-unit-graph-1-thumb

Typical system and control back pressure (left), and pressure differential (right) as a function of flow rate

 

auto-back-pressure-unit-graph-2-thumb

Typical pressure overshoot (System – Control) vs. flow rate at low (35 kPa) and high (310 kPa) system back pressure

 

Download the AutoBP Datasheet

See also:

Scribner Associates Inc.

Is a leading developer of high-quality instrumentation and software for the electrochemical research and development (R&D) community. Scribner Associates’ hardware and software products are used by academic, private and government laboratories in the areas of fuel cell development and evaluation, battery and redox flow cell technology, corrosion science and engineering, electrochemical sensors and multi-electrode arrays.

Read more

Contact Us

  150 East Connecticut Avenue
      Southern Pines, North Carolina, USA 28387

  +1-910-695-8884
  +1-910-695-8886
  info@scribner.com