Control Valves 2-way DN 20-80mm - Cast Iron | Clorius Controls

Clorius M2F – 2-Way Control Valve DN20–DN80

The Clorius M2F is a flanged, double-seated control valve made from EN-GJS-400-15 with a PN16 rating. It is suitable for hot water, steam, and lubricating oils, particularly when differential pressure requires greater closing force than a single-seated valve with the same actuator can provide.

Construction and Standards

• DN20 to DN80.
• Flanges according to EN 1092-2 PN16.
• Counter flanges: DIN 2633 / BS 4504.
• Actuator connection: G1B according to ISO 228.
• Shaft, seats, and cone: stainless steel.
• Gasket: stainless steel sheet and graphite.
• Pressure/temperature diagram according to DIN 2401.

Hydraulic Characteristics

The M2F features a quadratic flow characteristic and a control capability Kvs/Kvr >25. Seat leakage is ≤0.5% of Kvs according to VDI/VDE 2174, typical for double-seated construction. It should not be used as an isolation valve where tight shut-off is required.

Kvs and Stroke

• DN20: Kvs 5 m³/h, stroke 6.5 mm.
• 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 11 mm.
• DN80: Kvs 80 m³/h, stroke 13 mm.

Actuator Operation

Without an actuator, the valve remains open via a spring. It closes with pressure on the shaft. Combined with Clorius thermostats or electric actuators, it can close upon temperature increase. For cooling circuits, a reverse acting electric actuator or reverse acting self-operated control setup is used.

Applications

Suitable for heat exchangers, central heating, district heating, industrial thermal circuits, steam lines, and marine installations. The product page also mentions compressed air, cooling, demi water, heating, solar energy, and steam; final selection should verify PN16, temperature, materials, and acceptable seat leakage.