Bulletin TI-H2PD-K
Installation, Operation and Maintenance Manual
H2PD-150 and H2PD-300 Hydrogen Generators
www.parker.com/igfg
4
1-800-343-4048
Figure 2 - Flow Schematic
The Parker Balston H2PD-150 and H2PD-300 Hydrogen Generators incorporate all the components neces-
sary to convert deionized water into ultra high purity hydrogen gas using a nominal amount of electricity.
The key operating components of the hydrogen generators are the electrolytic cell, the palladium mem-
brane, and the pressure controller (see Flow Schematic, Figure 2).
The electrolytic dissociation of water to produce hydrogen and oxygen takes place in the electrolytic cell
of the Parker Balston Hydrogen Generator. The operational components of the cell are the anode and
cathode. The anode is nickel. The cathode is palladium, formed into tubes. (See “Palladium Membrane”
section below for further details.) The electrolysis reaction:
H
2
O H
2
+ (1/2)O
2
takes place in the cell as electricity passes through the deionized water. During electrolysis, oxygen and
other impurities collect at the annode and are subsequently vented from the generator. Hydrogen ions col-
lect at the cathode and pass through the palladium tubes, driven by the applied electric potential. Inside the
palladium tubes, the hydrogen recombines to form purified molecular hydrogen. The newly formed, ultra-
pure hydrogen is under pressure and ready to deliver, in a controlled flow, to the required usage point.
The palladium membrane consists of bundles of palladium tubes. Because of its small atomic size, only
hydrogen and its isotopes can pass through the palladium membrane; therefore, the hydrogen produced by
the Parker Balston Hydrogen Generator is ultra-pure.
Electrolytic Cell
Palladium Membrane
Pressure Controller
The hydrogen pressure at the outlet is regulated by an electronic pressure control circuit. A pressure trans-
ducer monitors the hydrogen pressure at a point between the cell and the outlet of the hydrogen generator.
The control circuit adjusts the electrical current to the cell as needed to maintain the hydrogen set pressure.
The Parker Balston Hydrogen Generators have a configurable display on the front panel. Both language
and pressure units can be selected by the user, by pressing the
Language/Pressure Unit Select
button
located under the top access panel as shown in figure 4. To configure the display:
1
Press and hold the
Language/Pressure Unit Select
button to scroll through the language options.
When the required language is displayed, release the button to select that language.
2
Following the language selection, pressure units can be selected. Press and hold the
Language/Pres-
sure Unit Select
button to scroll through the pressure unit options. When the required pressure units
are displayed, release the button to select the units.
Note:
Pressure units can only be changed after selecting a language.
Language/Pressure
Units Selection
The Parker Balston Hydrogen Generator has been certified to IEC 1010 Standards (CSA 22.2 No.1010.1-
92) and UL standards (UL 3101-1). The generators bear the CSA and UL safety markings on the product
label.
Note: Generators rated for 230 VAC service, carry the CE mark in addition to the CSA and UL marks.
