Description
Vulkan GPH 400 is a universal gas preheater for high-pressure gas systems up to 300 bar, designed for efficient heat transfer directly into the gas stream. It is intended for stable gas supply under high withdrawal rates and low ambient temperatures, where pressure reduction can otherwise lead to cooling and process instability. The unit is suitable for a wide range of industrial, laboratory, process, and food-gas applications, with connection versions available for different gas standards. The product is manufactured in accordance with Regulation (EC) No. 1935/2004, Regulation (EC) No. 2023/2006, and LFGB, and is suitable for contact with food gases. Core product data, including 400 W heating power, 300 bar max. pressure, 230 V / 50 Hz supply, brass gas-carrying parts, EPDM/PTFE seals, and IP44 protection, are stated in the Vulkan catalog and reflected on the competitor product pages.
Product description
Universal gas preheating for stable high-pressure performance
The Vulkan GPH 400 is built for reliable preheating of gases in high-pressure applications. Its patented heating principle transfers heat where it matters most — directly into the gas — which improves thermal efficiency and helps maintain stable operating conditions even during demanding withdrawal rates. The competitor product pages describe the GPH 400 specifically for preheating gas in the high-pressure range and highlight its use where low ambient temperatures or high flow demand would otherwise compromise process stability.
One solution for broad application coverage
This version is positioned as a universal gas preheater for all common technical, laboratory, process, and food-gas duties where controlled gas temperature matters. Based on the Vulkan catalog, the GPH 400 is offered in connection variants for oxygen, inert gases, nitrogen, and nitrous oxide, in both 200 bar and 300 bar configurations, which makes it suitable for a wide range of system layouts and installation standards.
Practical for international installations
The unit can be supplied with an EU plug, with a UK plug, or without a plug as cable-only version. A 110 V version is also available. This gives the GPH 400 practical flexibility for OEM integration, export projects, plant retrofits, and country-specific electrical requirements.
Built for industrial everyday use
The GPH 400 combines compact dimensions with solid technical performance. The catalog specifies a plastic housing, brass gas-carrying parts, EPDM/PTFE seals, IP44 protection, and a maximum pressure of 300 bar. The competitor product pages additionally mention an inlet filter, which strengthens the positioning of the unit as a practical industrial component rather than just a heating accessory.
Strong positioning for food-gas systems
For food processing, modified atmosphere packaging, and other gas-related food applications, the GPH 400 should be positioned not merely as a heater, but as a process reliability component. It is manufactured as a product that complies with VO (EG) 1935/2004, VO (EG) 2023/2006, and LFGB, and is suitable for contact with food gases. That gives the page a stronger commercial argument for customers working with food-grade gas systems.
Key benefits
- 400 W heating power for more effective gas preheating in demanding operating conditions
- Suitable for high-pressure systems up to 300 bar
- Universal application range across industrial, laboratory, process, and food-gas systems
- Patented heat transfer principle that delivers heat directly into the gas stream
- Compact and easy to integrate into existing gas supply systems
- Available with EU plug, UK plug, or cable-only version
- 110 V version available
- Manufactured for food-gas compatibility in line with Regulation (EC) No. 1935/2004, Regulation (EC) No. 2023/2006, and LFGB
- CE-marked and designed for dependable industrial service
Technical data
Technical data below are taken from the Vulkan catalog page for Gasvorwärmer Vulkan GPH 400.
| Parameter | Value |
| Product | Vulkan GPH 400 |
| Product type | Gas preheater |
| Housing | Plastic |
| Gas-carrying parts | Brass |
| Seals | EPDM / PTFE |
| Max. pressure | 300 bar |
| Voltage | 230 V / 50 Hz |
| Heating power | 400 W |
| Leak rate | 1 × 10⁻⁶ mbar l/s |
| Protection class | IP44 |
| Operating temperature | -20 to +60 °C |
| Length (L) | 150 mm |
| Height (H) | 90 mm |
| Weight | 2.0 kg |
| Marking | CE |
Versions and article numbers
Connection variants and article numbers below are taken from the same catalog page for the Vulkan GPH 400.
| Gas type | Pressure | Inlet | Outlet | Article no. |
| Oxygen | 200 bar | G 3/4 RH ÜM | G 3/4 RHaf | 451 208 |
| Oxygen | 200 bar | G 3/4 RHaf | G 3/4 RH ÜM | 451 218 |
| Inert gas | 200 bar | W 21.8 x 1/14 RH ÜM | W 21.8 x 1/14 RHaf | 451 206 |
| Inert gas | 200 bar | W 21.8 x 1/14 RHaf | W 21.8 x 1/14 RH ÜM | 451 216 |
| Nitrogen | 200 bar | W 24.32 x 1/14 RH ÜM | W 24.32 x 1/14 RHaf | 451 203 |
| Nitrous oxide | 200 bar | G 3/8 RH ÜM | G 3/8 RHa | 451 202 |
| Oxygen | 300 bar | W 30 x 2 RH ÜM | W 30 x 2 RHa | 451 308 |
| Oxygen | 300 bar | M 24 x 1.5 RH ÜM | M 24 x 1.5 RHak | 451 070 |
| Oxygen | 300 bar | M 24 x 1.5 RHak | M 24 x 1.5 RH ÜM | 451 079 |
| Inert gas | 300 bar | W 30 x 2 RH ÜM | W 30 x 2 RHa | 451 306 |
| Inert gas | 300 bar | M 24 x 1.5 RH ÜM | M 24 x 1.5 RHak | 451 072 |
| Inert gas | 300 bar | M 24 x 1.5 RHak | M 24 x 1.5 RH ÜM | 451 071 |
| Inert gas | 300 bar | G 1/4 RHi | G 1/4 RHi | 451 073 |
| Inert gas | 300 bar | 1/4 RH NPT F | 1/4 RH NPT M | 451 074 |
| Inert gas | 300 bar | G 1/2 RHk ÜM | G 1/2 RHak | 451 080 |
| Nitrogen | 300 bar | W 30 x 2 RH | W 30 x 2 RHa | 451 303 |

