Control valve balanced 2-way DN 15-80mm - Cast Iron | Clorius Controls

Clorius M1FBN – Balanced 2-Way Control Valve DN15–DN80

The Clorius M1FBN is a flanged, single-seated, balanced control valve designed for hot water, steam, and thermal oil applications. It is utilized when differential pressure requires a closing force greater than what a standard actuator can provide on a simple single-seated valve, yet double-seated leakage is unacceptable.

Construction and Standards

• Body: EN-GJS-400-15, cast iron.
• Internal parts, stem, seat, and cone: stainless steel.
• O-ring: A.75H FEPM.
• Gasket: graphite.
• PN16.
• Flanges according to EN 1092-2 or ANSI B16.5 Class 150.
• Actuator connection: G1B according to ISO 228.
• Pressure/temperature diagram according to DIN 2401.

Hydraulic Characteristics

The flow characteristic is quadratic, maintained until the flow drops below approximately 4% of full flow. Seat leakage is ≤0.05% of Kvs according to VDI/VDE 2174, with a regulating capability Kvs/Kvr >25.

Kvs per DN

• DN15: Kvs 4 m³/h, stroke 7.5 mm.
• DN20: Kvs 6.3 m³/h, stroke 7.5 mm.
• DN25: Kvs 10 m³/h, stroke 9 mm.
• DN32: Kvs 16 m³/h, stroke 10 mm.
• DN40: Kvs 25 m³/h, stroke 11 mm.
• DN50: Kvs 35 m³/h, stroke 11.5 mm.
• DN65: Kvs 58 m³/h, stroke 14.5 mm.
• DN80: Kvs 80 m³/h, stroke 16 mm.

Operation with Actuator

Without an actuator, the valve remains open via a spring. It closes with force on the stem. With Clorius thermostats, pneumatic or electric actuators, it can close upon temperature increase. In cooling circuits, a reverse acting electric actuator is required.

Applications

Suitable for heat exchangers, central heating, district heating, steam circuits, thermal oils, industrial processes, and marine installations. Selection is based on Kvs, available Δp, medium temperature, body material, and required leakage class.

Installation

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