Stafsjö MVL020F50P00 Instructions De Montage Et D'entretien page 7

B5 Steps to install
On handwheel operated valves, when the handwheel is not assembled at delivery, follow the steps below to assemble
the handwheel to the valve.
Handwheel with non-rising
stem
1. Assemble the handwheel to
the valve. Check that there is
not any play between the
actuator, bearing and yoke. If
there is, eliminate the play by
rotating the stem 360 degrees
counter-clockwise. Then fixate
the handwheel with a locking
nut.
When the handwheel is assembled, install the valve into the pipe (system).
When installing the valve, make sure that:
• The valve's centre line is on the same centre line as the flanged pipes.
• Flange surfaces of the pipe and valve must be exactly parallel.
If the flanges and the valve are not centred, the valve may be damaged by erosion and a dirt pocket may occur which
can lead to clogging and corrosion of the valve.
• Valve type RKO and XV must be installed in closed position only.
• Valve type SLV, SLF, SLH and SLX must be installed in open position only!
• When the SLV and SLF valve body are closed by bottom cover and/or when SLH and SLX purge ports
are closed by plugs, flushing is recommended through the purge ports at service if it is not clean fluid.
1. Place the gaskets between the valve body and the flange. Check that the gasket is well centered and covers the
complete surface of the retainer ring.
Valve types WB, SLV, SLF, SLH and SLX only:
These valve types are equipped with integrated rubber flange gaskets – additional gaskets are not
necessary.
2. Lubricate the bolts. This allows correct pre-setting of the flange and makes it easier to dismantle the bolting later.
1. Make sure that the 2. Assemble the
safety pin is mounted in handwheel unit to the tie
order to lock the gate. rods and fixate it with
Loosen the nuts from washers and nuts. Attach
the tie rods and remove the gate clevis to the
the temporary yoke gate and fixate with
plate. clevis pin and split pins.
Fig. 4 Assembling of handwheel
Handwheel with rising-stem
3. Remove the safety pin.
For safety reasons, the pin
shall not be removed until
the hand-wheel unit is
assembled and the gate
clevis is properly attached
to the gate.
Fig. 5
Document: is-VALVE, 21-02-11 issue: 15