The GV310R-32B17 is a 3-way mixing globe valve from the VG310R series, sized for DN32 (32 mm) pipe with Rp internal threads. The bronze body and brass trim (plug and packing) handle water and glycol mixtures up to 60 % concentration. The 17 kvs flow coefficient tells you the full-open flow capacity at 1 bar pressure drop — useful for sizing the actuator and predicting system head loss. Seat leakage is Class III (0.1 %) on both mixing ports (A-AB and B-AB), meaning a small drip is expected at shutoff; this is standard for modulating control valves, not isolation duty. The equal percentage flow characteristic gives fine control at low openings and higher gain near full open — what you want for temperature control loops in hydronic systems. Rangeability greater than 50:1 means the valve maintains stable control from 2 % to 100 % of rated travel.
The valve body measures 32 mm (1-1/4 in) — the standard pipe size for a DN32 inline fitting. Stroke length is 11 mm, so the actuator stroke must match that travel. Stem up closed action: when the stem rises, the valve closes; verify actuator fail-position logic against this convention. The Rp internal threads are parallel (BSPP), not tapered — use a bonded seal or O-ring at the joint, not PTFE tape alone, to avoid leaks in water-glycol service.