The GV310R-25B12 is a 3-way mixing globe valve from the VG310R series, sized DN25 with Rp internal threads and a bronze body rated PN16. Its 10 kvs flow coefficient and equal-percentage characteristic give it a smooth, predictable response across the control range — meaning it handles the modulating loop in hydronic HVAC or process water circuits without the valve hunting at low openings. The rangeability greater than 50:1 means it maintains stable control from near-closed to fully open, which matters when the load varies widely across the day.
The valve accepts water and glycol mixtures up to 60 %, with an operating fluid temperature range of -7 to 100 °C. Seat leakage meets Class III (0.1 %) on both ports A-AB and B-AB, which is the standard for closed-loop control where a small dribble past the seat is acceptable — not for positive shut-off applications. The stroke is 11 mm, stem up closed, so the actuator stroke and spring range must match that travel. Body size is 25 mm (1 in), pipe size 25 mm, connection is Rp internal thread — a BSP parallel thread, so the mating fitting needs a sealing washer or thread sealant, not taper-seal.
The product status is Active. No end-of-life notice or successor order code is recorded for this MPN.