Jacobs - Model ASP 520R Series -Hi-Flow Mini-Eductor

• gases in vent headers to be discharged to a flare
• analyzed samples returned to the process
• process fluids (gas or liquid) used as eductor motive source
• high vacuum/high flow to strip volatiles from process streams
• high dilution ratios with high sample flow
• compact design with integral compression fittings assuring no leaks

These are some of the performance requirements that this eductor was specifically designed to deliver.  These and other needs have led to the development of the Hi-Flow mini-eductor in a compact design.

Often times due to environmental regulations, analyzed gas samples must be exhausted to a disposal system which has an elevated or fluctuating backpressure.  Figure 1 illustrates the motive pressure required to deliver a sample flow of 1 LPM, the flow rate commonly used in ¼” sample transport lines, at elevated discharge pressures.  The Hi-Flow mini-eductor will also produce much higher flow rates when needed, e.g. for longer transport lines (see Figure 2).  This becomes important when exhaust from analyzer vent headers (analyzer sheds) must be sent to a return that fluctuates in pressure, e.g. a plant flare.  Vent pressure from the analyzers must be “isolated” from these pressure fluctuations to preserve the integrity of the measurement.  This can be sent directly at a given pressure/flow or integrated into reactive systems that isolate the analyzer from fluctuating outlet pressures.  This is done by controlling the pressure of the vent header and motive gas while pumping the effluent sample gases into the fluctuating return system.  These systems not only deliver higher flow rates but react to the backpressure as well, automatically adjusting the motive air pressure while minimizing air usage.

Included below are performance curves for the “Hi-Flow mini-eductor” for gas and liquid use.