MTVS MTRS

MTVS / MTRS
MTVS / MTRS
2- and 3-way control valves
Size DN15–DN50
Kvs value 0.63...39
Rangeability 100:1
The MTVS and MTRS range of valves are intended for
use in heating and ventilation systems. They are also
highly suitable for use in fresh water systems, as they are
made of dezincification resistant brass and gunmetal.
Media temperature -5...+185°C
For use in heating and ventilation systems
Pressure class PN16
Function
2-way valve (MTVS)
The valve is closed when the stem is at its highest
position.
3-way valve (MTRS)
Open between port A and port AB when the spindle is
in its lowest position (is in this position closed between
ports B and AB). Open between port B and port AB when
the spindle is in its highest position (is in this position
closed between ports A and AB).
See also drawing on page 2.
Conversion from 2-way into 3-way
The valve can be easily converted from 2-way into 3-way
(and vice versa) without dismantling.
Actuators
MTVS and MTRS are intended for use together with
RVA5... model actuators. Systemair also offers adapters
for adjusting the valves for use with actuators of other
brands.
Installation
The valve is to be mounted according to the flow
direction arrows on the valve.
The 2-way valve should be mounted with port A on the
inlet and port AB on the return (flow direction A in, AB
out) to ensure that the plug closes tightly and to prevent
eventual noise when closing.
The 3-way valve is of a mixing type and must therefore
be mounted in the mixing point.
OK
OK
Material
The valves have body and plug in gunmetal and spindle in
stainless steel. It has O-rings made of Viton.
Flow characteristics
The flow characteristic of the valve is equal percentage, in
accordance with the figure below.
Flow
Open
valve
Closed
valve
revision
12 2012

Summary of content (3 pages)