The GV310R-40B24 is a three-way globe mixing valve from the VG310R series, sized DN40 with a bronze body rated PN16. It uses an equal-percentage flow characteristic and a kvs of 24, with a stroke of 11 mm and rangeability greater than 50:1 — suited to hydronic systems where precise modulation over a wide flow range is needed.
PN16 pressure class means the valve body is rated for a maximum working pressure of 16 bar at the rated temperature — standard for building-services hydronics and district-energy secondary loops. The seat leakage meets Class III (0.1 % of rated flow) on both A-AB and B-AB ports, which is the expected spec for mixing applications where tight shutoff isn't required but low leakage at the seat is still controlled. The equal-percentage flow characteristic (kvs 24) gives a linear installed gain when paired with a 2–10 V or 0–10 V modulating actuator — common in chilled-water or low-temperature hot-water coils. Stem-up-closed action means the valve closes as the stem extends, which matches most standard spring-return actuators. Medium compatibility includes water and glycol mixtures up to 60 %, with an operating fluid temperature range of -7 to 100 °C. That covers chilled-water loops and low-temperature heating circuits but not steam or high-temperature hot water above 100 °C.