Belimo EXT-H625XP-400 - pressure-independent 2-way globe valve

Belimo EXT-H625XP-400 globe valve

2-way globe valve with a mechanical differential pressure regulator and a control valve driven by a Belimo actuator. The regulator compensates for pressure fluctuations, maintaining a constant differential pressure across the control valve. Correct flow control requires the minimum differential pressure across the valve to be maintained.

Key technical data

• Nominal diameter: DN 25; nominal pressure: PN 25.
• Connection: flange in accordance with EN 1092-2.
• Nominal flow V'nom: 1.1 l/s (4 m³/h).
• Theoretical Kvs value: 8 m³/h; stroke: 11 mm.
• Medium: water, water with up to 30% vol. glycol.
• Medium temperature: 5...140°C [41...284°F].
• Maximum differential pressure across the control valve: 1500 kPa.
• Flow characteristic: equal percentage.
• Permissible leakage for DN 25: max. 0.02% of the Kvs value.
• Body: EN-GJS-400-18-LT (GGG 40.3).

Application and installation

The valve is designed for closed water circuits (pH >7) and district heating networks. Permissible mounting position: vertical to ±45° relative to the stem. Observe the direction of flow indicated by the arrow on the body.

To prevent cavitation during operation, the maximum differential pressure ∆pmax must be calculated in accordance with the design notes.