1.
What is the difference between FiderisTM smaller gas units and the larger "pneumatically controlled" gas units?
There are three significant differences between these two classes of systems:
- The larger system uses pneumatically controlled valves rather than direct lift solenoid valves on the reactant gases. This provides a longer life system since these valves are rated at over 5 million cycles!
- The larger systems have their control unit in a separate cabinet which may be installed some distance from the gas handling portion of the hardware. This allows more freedom in the placement of the operators position with respect to the fuel cell, e.g., in a control room.
- The larger systems have purge systems for both the fuel and oxidant while the smaller units and the test kits only have a purge on the fuel.
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2.
Do all gas units have backpressure control?
No, but all units may be ordered with a 'gas handling upgrade' which provides backpressure control of the tail gas. A gas handling upgrade may also be ordered to include differential pressure transducers.
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3.
Can I get computer controlled backpressure?
Yes. Computer controlled backpressure is available on all of our test stations.
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4.
Is there a water knockout on the tail gas system?
All systems potentially having liquid water in the tail gas are provided with water knockouts before the backpressure regulators. Exceptions would be some of the SOFC systems.
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5.
Can I have one or more gas channels replaced with a liquid channel?
Generally, yes. Depending upon the flow rate required, any of the gas mass flow controllers may be replaced with a liquid mass flow controller or in some cases a liquid metering pump.
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6.
Do all of your gas systems include a purge?
Yes, all of our test stations provide a purge for safety.
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7.
Can I upgrade my gas system?
Yes. All gas metering and gas mixing units may be retrofitted with a gas handling upgrade at a later time.
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