© Danfoss | 2021.09 | 5
AQ17188647495001-010601
MSV-F2 DN15 - 400
ENGLISH
Handling
Storage
- Storage temperature –20 to +65 °C dry; free
of dirt
- A desiccant or heating to prevent
condensation is necessary in damp rooms.
- Don’t damage the paintwork.
Transport
- Transport temperature –20 to + 65 °C.
- Protect against external force (impact,
vibration etc.).
- Don’t damage the paintwork.
Handling before installation
- If flange covers are fitted, remove shortly
before maintenance !
- Protect against atmospheric conditions e.g.
wetness (applicate a desiccant).
- Correct handling protects against damage.
Description
Scope of applications
Line regulating valves with a defined
characteristic for heating and cooling systems.
The plan designer is responsible for selecting
the correct valve for the purpose.
Note: Do not use MSV-F2 valves for handling
steam!
Operating principles
The valve is closed (cone/seating function) by
turning the hand wheel
clockwise.
- Position of the plug at DN 15 - 150 is shown
on two digit display. The outer digit shows
the basic setting and the internal digit shows
every tenth of the turn. See Fig. 1.
- Position of the plug at DN 200 - 400 is shown
on the longitudinal scale. Fig. 2.
Installation
General notes on installation:
The following points should be taken into
account besides the general principles
governing installation work:
- Remove flange covers if present.
- There must be no foreign bodies inside the
valve or piping.
- Pay attention to the direction of flow: see
markings on the valve
- Valves can be installed with the spindle
pointing in any direction, but the preferred
spindle position is vertical.
- Reference for isolation:
If media-temperatures < ambient
temperatures - ask manufacturer.
- Installation upside down only if the medium
is clean.
- Centre packings between the flanges.
- Install test plugs before valve is filled with
water.
See accessories in the datasheet MSV-F2.
- Connection flanges must mate exactly.
- All parts must be free from stress after
installation.
- The valve must not serve as a fixed point. It
must be carried by the piping.
- Protect the valve from dirt, especially during
construction work.
- Install compensators to compensate for
thermal expansion of the piping.
- It is forbidden to heat the valve to above its
service temperature (see data sheets), for
instance by welding, grinding, etc.
- To ensure that the valves function correctly,
the pipe run should be straight for at least
5D upstream and 2D downstream of the
valve.
Presetting and locking the handwheel
DN
15
-
150:
a: Position of the plug at DN 15 - 150 is shown
on two digit display. The outer digit (a)
shows the basic setting and the internal digit
(b) shows every tenth of the turn. See Fig. 4.
b: Remove cover plug (c) by introducing a
screwdriver in the slot and gently prising it
out. See Fig. 5.
c: Turn the hand-wheel clockwise and close
the valve fully. Digital display shall show 0,0.
Turn the hand-wheel counter clockwise to
required value of presetting by using the
setting table (i.e. 4,5, see Fig. 4).
d: Turn the inner adjustment screw (d)
clockwise until it seats. Use enclosed 3mm
allen key for DN 15 - 50 and 4 mm allen
key (e) for DN 65 - 150. The valve now can
be closed, but not opened more than the
setting value. See Fig. 5.
e: Optionally you can lock the hand-wheel and
protect the setting. Fit the enclosed clip (f)
in the cut-out in the hand-wheel. Thread the
sealing wire (g) through the holes on the clip,
hand-wheel and lead seal. Fit the lead seal.
See Fig. 6.
DN 200 - 400
a: Turn the hand-wheel clockwise and close the
valve fully by hand (“0” position).
b: Unscrew the cap (h). See Fig. 7.
c: Turn the hand-wheel counter clockwise to
required value of presetting by using the
setting table.
d: Turn the stroke limiter (i) clockwise until it
seats. Protect it by fixing the lock nut (j).
e: Screw on the cap.
MSV-F2 as ASV partner valve
Impulse tube connected to red test plug
- Partner valve inside control loop (Fig. 8).
Offers flow limitation on the riser/branch
however part of the controlled pressure range
is used by pressure drop on partner valve. It is
recommended when flow limitation on each
terminal unit is not possible.
- Connect impulse tube to red test plug on
MSV-F2
Impulse tube connected to blue test plug
- Partner valve outside control loop (Fig. 9).
Offers flow verification on the riser/branch
Recommended configuration: It results in best
performance since whole controlled pressure
range is available to the riser/branch. Flow
limitation is done on each terminal unit.
- Connect impulse tube to blue test plug on
MSV-F2
