Belimo R3025-S2 - 3-way changeover ball valve

Belimo R3025-S2 – changeover ball valve

3-way valve for closed water systems, designed for changeover and on/off control on the water side of ventilation and heating systems. The valve is operated by a rotary actuator controlled by an open/close signal.

Key technical data

• DN 25, PN 40; Rp 1" female thread in accordance with ISO 7-1.
• Kvs 26 m³/h; flow through bypass B – AB: approx. 50% of the Kvs value.
• Medium: water or water with max. 50% vol. glycol; medium temperature -10...120°C [14...248°F].
• ∆pmax 1000 kPa; closing pressure ∆ps 1400 kPa. 200 kPa is specified for quiet operation.
• Leakage A – AB: bubble-tight, leakage rate class A (EN 12266-1); B – AB: leakage rate class I (EN 1349 and EN 60534-4), max. 1% of the Kvs value.
• Rotational angle 90°. Nickel-plated brass body; stainless steel closure element and spindle.
• Spindle seal: EPDM O-ring; seat: PTFE, EPDM O-ring.

Installation notes

Installation is permitted from vertical to horizontal in relation to the valve axis; installation with the axis pointing downwards is not permitted. Follow the flow direction indicated by the arrow on the body.

At a medium temperature of -10...2°C, spindle heating or a valve neck extension is recommended. The permitted medium temperature may depend on the actuator type; limitations are specified in the relevant actuator data sheets.