Belimo R520 - 3-way changeover ball valve

Belimo R520 – changeover ball valve

3-way ball valve for open and closed water systems. It is actuated by a rotary actuator controlled by an open/close signal.

Key technical data

• DN 20, PN 40; G 1 1/4" male thread in accordance with ISO 228-1.
• Kvs 21 m³/h; flow through bypass B – AB: approx. 50% of the Kvs value.
• Medium: water, water with up to 50% by volume glycol; potable water on request.
• Medium temperature: -10...100°C [14...212°F]. Valve stem extension is recommended at -10...2°C. The permissible range may depend on the actuator used.
• Maximum differential pressure ∆pmax 400 kPa; closing pressure ∆ps 1400 kPa. 200 kPa is specified to ensure quiet operation.
• Leakage A – AB: bubble-tight, leakage class A (EN 12266-1). B – AB: leakage class I (EN 1349 and EN 60534-4), max. 1% of the Kvs value.
• Rotation angle: 90°. Nickel-plated brass body; stainless steel closing element and stem.

Installation notes

Permitted mounting position: from vertical to horizontal in relation to the stem; do not install with the stem pointing downwards. Observe the flow direction indicated by the arrow on the body.