Belimo R550 - 3-way changeover ball valve

Belimo R550 – changeover ball valve

3-way ball valve with male thread, designed for open and closed water systems. Used for changeover and open/close control on the water side of ventilation and heating systems.

Key features and specifications

• DN 50; G 2 3/4" male thread; PN 25.
• Kvs 49 m³/h; ps 1600 kPa.
• Fluid: water or water with a maximum of 50% by volume glycol; drinking water on request.
• Fluid temperature: -10...100°C [14...212°F]. At -10...2°C, a valve neck extension is recommended; the permissible temperature may depend on the actuator type.
• Maximum differential pressure ∆pmax 400 kPa; closing pressure ∆ps 1400 kPa. 200 kPa is specified for quiet operation.
• Bypass B – AB: flow approx. 50% of the Kvs value.
• 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.
• Nickel-plated brass body; stainless steel closing element and stem. Rotation angle: 90°.

The valve may be installed with the stem from vertical to horizontal; installation with the stem pointing downwards is not permitted. Observe the flow direction indicated by the arrow on the body.