Designed for 350 bar (35 MPa) hydrogen systems, the H-PRD4 Series offers high-flow pressure relief devices (PRDs) in both end plug and remote-activated formats. Suitable for longer tank setups, it supports M25, 1-1/8”, 1-1/2”, 2”, and remote thread geometries, with optional temperature sensors.
All models share a common activation design and are typically paired with GFI tank valves for full bonfire test coverage and thermal event protection.
Design
- Threads: M25, 1-1/8”, 1-1/2”, 2”, and remote
- Remote PRDs: inlet, vent, and outlet ports
- Final PRD: inlet and vent only
Performance & Options
- Nominal working pressure of 350 bar (35 MPa)
- Activation: 110 °C ± 5 °C
- Temp range: -40 °C to +85 °C
- High flow, fast-acting
- Cadmium-free eutectic design
- Lightweight aluminum
- Optional temperature sensor with connector
- Certified to HPRD1, EC 79, GB35544 (by model)
H-PRD4 Series |
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|---|---|
General Information |
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| Application | Suitable for all hydrogen cylinders Type 1 / Type 2 / Type 3 / Type 4 |
| Design | Thermally activated PRD |
| Body Material | Aluminum, anodized |
| Fuel Type | Hydrogen per SAE J2719 and ISO 14687 |
Performance |
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| Nominal Working Pressure | 35 MPaG |
| Max Working Pressure | 43.8 MPaG |
| Working Temperature | -40 °C to +85 °C |
| T-PRD Operation | 110 ± 5 °C |
| T-PRD Orifice | Up to 5.7 mm equivalent diameter |
Electrical Connections (for temperature sensor option) |
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| Electrical Connector | Mating Connector: Aptiv part number 12052644 |
| Thermistor R25C | 2,700 ohms ± 2% |
| Thermistor Type | NTC |
Connections / Certifications |
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| Configurations | M25, 1-1/8”, 1-1/8” with temperature sensor, 2”, remote in-line and end-line (9/16-18 UNF-2B ports) |
| TPRD Vent Port Type | 9/16-18 UNF-2B, Indexible options |
| Certifications | Depending on model: HPRD1, EC 79, R134, EU 535, ISO 19882, PED and/or GB35544 |
