Control valve balanced 2-way DN 25-80mm - Cast Steel | Clorius Controls

Clorius H1FB – Balanced 2-Way Control Valve DN25–DN80

The Clorius H1FB is a flanged, single-seated control valve with a cast steel GP240GH / GS-C25 body and a nominal pressure rating of PN40. It features a pressure-balanced design with a stainless steel bellows on the stem to reduce actuator closing force requirements in high differential pressure applications.

Technical Specifications

• DN25 to DN80.
• PN40.
• Flanges: EN 1092-1 PN40.
• Actuator connection: G1B per ISO 228.
• Stem, seat, cone, and bellows: stainless steel.
• Gasket: copper/graphite Reinz-AFM34.
• Flow characteristic: quadratic.
• Seat leakage: ≤0.05% of Kvs per VDI/VDE 2174.
• Regulating capability: Kvs/Kvr >25.

Kvs and Stroke

• DN25: Kvs 7.5 m³/h, stroke 7 mm.
• DN32: Kvs 12.5 m³/h, stroke 8 mm.
• DN40: Kvs 20 m³/h, stroke 9 mm.
• DN50: Kvs 30 m³/h, stroke 10 mm.
• DN65: Kvs 50 m³/h, stroke 13 mm.
• DN80: Kvs 80 m³/h, stroke 16 mm.

Operation

Without an actuator, the valve remains open via a spring and balancing mechanism. It closes with force applied to the stem. In conjunction with Clorius thermostats, the valve closes as temperature increases. For cooling circuits, a reverse acting electric actuator or reverse acting self-operated control setup is used.

Applications

Suitable for hot water, steam, and thermal oil in heat exchangers, district heating, thermal skids, industrial processes, and marine installations. Selected when low single-seat leakage is required, but pressure and DN necessitate balancing for controlled closure.

Installation

Installation can be vertical or horizontal. Up to 170°C, the thermostat or actuator can be mounted above or below the valve. Above 170°C, a cooling unit for the thermostat or a high-temperature adaptor for the electric actuator is required.