Danfoss MSV-F Plus DN 15, Инструкция по эксплуатации

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7369349-0 SIBC
VI.B1.Q2.6B © Danfoss 11/03 5
ENGLISH
1.0 Handling
1.1 Storage
- Storage temperature -20° to +65°C
dry; free of dirt
- The painting is only a primer,
intending to guard against rust
during stock or transportation.
Don't damage the paintwork.
- A desiccant or heating to prevent
condensation is necessary in
damp rooms.
1.2 Transport
- Transport temperature -20° to
+ 65°C.
- Protect against external force
(impact, vibration etc.).
- Don't damage the paintwork
1.3 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.
2.0 Description
2.1 Scope of applications
Line regulating valves with a
defined characteristic for heating
and cooling systems. The plant
designer is responsible for
selecting the correct valve for the
purpose.
Note: Do not use MSV-F Plus valves
for handling steam!
2.2 Operating principles
The valve is closed (cone/seating
function) by turning the hand wheel
clockwise. Do not use tools to
increase the torque on the hand
wheel. The valve spindle is sealed
by an EDD double flexible seal
system. The stress on the EDD
double flexible seal system is
relieved by the return seal when the
valve is fully open. The position of
the plug is shown on the digital
display every complete turn and
every tenth and five-hundredths of a
turn.
3.0 Installation
3.1 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
fianges.
- Connection flanges must mate exactly.
- If the valve is handling steam, the
piping must be laid with a gradient
to prevent water from accumulating
in pockets. Condensation traps are
needed to prevent water-hammer.
- 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 2 x n.d.
upstream and 6 x n.d. downstream
of the valve.
3.2 Mounting the handwheel and
display in lagged pipe runs
Removing the handwheel
1. Close the valve by hand
("0" position).
2. Unscrew the cap.
3. Lift off the handwheel with the
attached digital display.
4. Insulation diameter:
DN 65 - 200 = 87 mm
Do not remove the insulation cap.
Fitting the hand wheel and display
1. Set the handwheel with the
attached digital display in place.
2. Position the display ("0" position)
on the side with the tapped hole.
3. Screw on the cap:
DN 15-200 = 15 Nm
Fault Possible cause Corrective measures
No flow Valve closed. Open valve.
Flange covers not removed. Remove flange covers.
Little flow Valve not sufficiently open. Open valve.
Dirt screen clogged. Clean / replace screen.
Relieve pressure first!
Piping system clogged. Check piping system.
Valve difficult to move or Wrong direction of rotation. Turn in correct direction (anticlockwise to
cannot be opened open valve).
Valve spindle leaking EDD-special spindle seal. Replace valve or bonnet.
Relieve the pressure in the system first!
Leakage across valve seat Valve not properly closed. Pull hand wheel tight without tools.
Seat or plug damaged by foreign particles. Replaced valve. Consult supplier/manufacturer.
Relieve the pressure in the system first!
Pressure difference too high. Check system pressure and pressure drop
(max.
∆
p =16 bar).
Reduce system pressure.
Medium contaminated (suspended solids). Clean valve.
Install dirt screen upstream of valve.
Relieve the pressure in the system first!
Valve with stroke limiter Stroke limiter on spindle stop has been Turn stroke limiter upwards.
cannot be opened tightened.
Flange broken between valve Bolts tightened unevenly. Realign piping and fit new valve !
and piping Mating flanges not properly aligned. Relieve the pressure in the system first!
Display does not show "0"/ Display not fitted properly after pipe was Close valve, unscrew cap (23), remove
"0" when valve is closed lagged. hand wheel with attached digital display,
set display to "0"/"0" and reassemble in
reverse order. (See point 3.2).
False data recorded False data displayed. See point 3.2.
PFM 90/2000/3000
Observe operating= instructions for measuring
instrument used.
4.0 Throubleshooting