Belimo R3020-4-S2 - 3-way ball control valve

Belimo R3020-4-S2 – 3-way control valve

A valve with a regulating orifice for closed water systems, designed for water-side control in ventilation and heating systems. Control is provided by a rotary actuator operated by a modulating or 3-point signal.

Key features and parameters

• Pattern: 3-way; DN 20; PN 40.
• Connection: Rp 3/4" female thread.
• Kvs: 4 m³/h; flow through bypass B – AB: 70% of the Kvs value.
• Medium: water, water with max. 50% vol. glycol.
• Medium temperature: -10...120°C [14...248°F].
• Differential pressure: ∆pmax 350 kPa; closing pressure: 1400 kPa. 200 kPa is specified for quiet operation.
• Flow characteristic: A – AB equal percentage, B – AB linear.
• Leakage: A – AB bubble-tight, leakage class A; B – AB leakage class I, 1...2% of the Kvs value.
• Nickel-plated brass body; stainless steel closing element and stem.
• Rotation angle: 90°.

For medium temperatures of -10...2°C, stem heating or a valve neck extension is recommended. The permitted medium temperature may depend on the actuator type.

Permitted mounting position ranges from vertical to horizontal relative to the axis; mounting with the axis pointing downwards is not permitted. Observe the flow direction indicated by the arrow on the body.