Products

Products

The first worldwide to be certified to a global standard.
An end-boss PRD perfect for large or long cylinders

EPRD-H70

Secondary Pressure Relief Device for 70 MPa Hydrogen Fuel Cells

A secondary pressure relief device for 70 MPa hydrogen fuel cells, the first worldwide to meet a global standard. The pressures of the operating parts are in equilibrium while supplying hydrogen. This means that they are not affected by the pressure inside the cylinder and operate stably at a wide range of pressures. In an emergency, the fusible alloy melts and safely releases the gas inside.

  • [Functions]
    Compatible with high-pressure hydrogen cylinders and valves at pressures of up to 87.5 MPa. Its safety feature safely releases the gas inside in an emergency.

Features

  • Since the pressures of the operating parts are in equilibrium, they are not affected by the pressure inside the cylinder and operate stably at a wide range of pressures.
  • In case of abnormal temperature rises such as in fires, the fusible alloy melts to operate the pressure relief device.
  • No stress is placed on the fusible alloy, and this prevents creep and deformation of the alloy and achieves extremely high durability.
  • Uses a lead- and cadmium-free fusible alloy, meeting the requirements of the RoHS Directive.
  • Certified to Global Technical Regulation No. 13, UNECE Regulation R-134, and UNECE Regulation R-146.
Requirement
Model PRD-AH70
Nominal Working Pressure (NWP) 70MPa (700bar) @15℃
Max operating pressure (MOP) 87.5MPa (875bar)
Temperature range -40 ℃ — +85 ℃
Body material Aluminum
TPRD activation temperature 112℃
Certifications UNECE Regulation R-134
UNECE Regulation R-146
Global Technical Regulation No.13
High Pressure Gas Safety Act.(JP)

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