flamco MeiFlow Shunt UD DN15 S, Installation & Service Instructions Manual, Page: 11 / 66

MeiFlow Shunt UD
Last updated: Aug-19
ENG Page 11
5. Components
5.1 NexusValve Vivax and 3-section actuator (in primary circuit)
The NexusValve Vivax valve is a combination of a pressure-independent flow limiter and a control
valve that maintains a constant flow irrespective of any fluctuations in pressure.
Together with the actuator, it combines an automatic flow limiter with a two-way control valve. When
given complete control authority, the valve reacts immediately and regulates the flow in accordance
with the signal sent e.g. by a room thermostat. The NexusValve Vivax valve prevents the system from
overflowing at any time.
Configuration:
The NexusValve consists of a presetting unit which functions like a manual circuit regulation valve, an
actuator, a differential pressure regulator, measurement points, a fluctuation jet and a valve housing.
Functions:
The internal valve parts are configured as
insertable units. The complete insert can be
taken out for ease of system flushing. Once the
insert has been removed, a blind cap (which
also serves as a flow presetting tool) is fitted to
ensure the housing is leak-tight during
flushing.
Dimensions in [mm]:
A B C D
DN15 S 76 35 95 44
DN20 S/H 83 49 120 55
Type; Kvm; colour code:
DN15 S (½”); 0.78 m³/h; red
DN20 S (¾”); 1.90 m³/h; white
DN20 H (¾”); 4.70 m³/h; black