User Manual

Siemens
A6V11841938_en--_a
Smart Infrastructure
2019-11-25
Use
● For use in ventilation and air-conditioning systems for water-side terminal unit control in
closed circuits, e.g. for induction units, fan-coil units, small reheaters and small re-
coolers.
– 2-pipe systems with 1 heat exchanger for heating and cooling
– 4-pipe systems with 2 separate heat exchangers for heating and cooling
● In closed-circuit zone heating systems, for example:
– Separate floors in a building
– Apartments
– Individual rooms
Technical design
● Disc throttling element
● Rubber wrapped plug
● Seat machined into through-port
● Dual sealing with O-ring and rubber
● Return spring (to open position)
Sizing
Example:
① V
100
= 0.27 l/s
② ΔPv
100
= 9 kPa
③ K
vs
value required = 3.5 m
3
/h