4.7
Testing the Valve
WARNING:
WHEN PRESSURE TESTING, EXERCISE CAUTION AND MAKE SURE
ALL EQUIPMENT USED IS IN GOOD WORKING CONDITION AND
APPROPRIATE FOR THE INTENDED PRESSURE.
If the valve is to be tested prior to returning to service
make sure the test pressures are in accordance with an
applicable standard.
When testing the valve for external tightness, keep the ball
in the half open position.
If testing the valve seat tightness, please contact Metso for
advice.
WARNING:
WHEN PERFORMING ANY TESTS, NEVER EXCEED THE MAXIMUM
OPERATING PRESSURE OR MAXIMUM SHUT-OFF PRESSURE LISTED
ON THE IDENTIFICATION PLATE!
5.
HANDLE MOUNTING
Place the handle (17), the shakeproof washer (19) and handle
nut (16) on the valve stem and tighten the nut to the torque
shown in (Table 1). Cycle the valve slowly with a gentle back
and forth motion to build gradually to the full quarter turn.
By cycling the valve slowly, the seat lips will seal against the
ball. A fast turning motion at this point may cut the seats
before they have a chance to form the proper seal.
6.
ACTUATOR MOUNTING
See AMI-8 for complete instructions.
IMPORTANT: When these valves are equipped with an
actuator and the actuator is removed to service the valve,
PROPER ALIGNMENT OF THE ACTUATOR DRIVER AND
VALVE STEM IS ESSENTIAL WHEN THE ACTUATOR
IS REMOUNTED. In the case of valves and actuators
connected with a split no-play (clamped) coupling, tighten
the coupling bolts before final tightening of the valve
bracket bolts. In the case of valves and actuators with solid,
loose-fit couplings, the actuator should be positioned on
the valve without any side loading of the coupling in both
the open and closed positions before final tightening of the
valve bracket bolts.
AMI-8 is available from your Metso Distributor, or on www.
metso.com/valves.
WARNING:
FOR YOUR SAFETY IT IS IMPORTANT THAT THE FOLLOWING
PRECAUTIONS BE TAKEN!
BEFORE INSTALLING THE VALVE AND ACTUATOR, BE SURE THE
INDICATOR POINTER ON TOP OF THE ACTUATOR IS CORRECTLY
INDICATING THE VALVE’S POSITION. FAILURE TO ASSEMBLE THESE
TO INDICATE THE CORRECT VALVE POSITION COULD RESULT IN
DAMAGE OR PERSONAL INJURY!
WHEN INSTALLING A LINKAGE KIT OR SERVICING THE VALVE/
ACTUATOR ASSEMBLY, THE BEST PRACTICE IS TO REMOVE THE
ENTIRE ASSEMBLY FROM SERVICE!
AN ACTUATOR SHOULD BE REMOUNTED ON THE SAME VALVE
FROM WHICH IT WAS REMOVED. THE ACTUATOR MUST BE
ADJUSTED FOR THE PROPER “OPEN” AND “CLOSE” POSITIONS EACH
TIME IT IS REMOVED!
THE LINKAGE KITS HAVE BEEN DESIGNED TO SUPPORT THE WEIGHT
OF THE METSO ACTUATOR AND RECOMMENDED ACCESSORIES.
USE OF THE LINKAGE TO SUPPORT ADDITIONAL EQUIPMENT OR
ADDITIONAL WEIGHT SUCH AS PEOPLE, LADDERS, ETC., MAY
RESULT IN THE FAILURE OF THE LINKAGE, VALVE, OR ACTUATOR;
AND MAY CAUSE DAMAGE OR PERSONAL INJURY!
6.1
Open/Close Position Adjustment
NOTE: Refer to the appropriate Installation, Maintenance, and
Operating Instructions (IMO) for specific directions on how to
adjust the actuator travel stops or limit switch (see Table 5).
7.
SERVICE / SPARE PART
We recommend that valves be directed to our service
centers for maintenance. The service centers are equipped
to provide rapid turn-around at a reasonable cost and offer
new valve warranty with all reconditioned valves.
NOTE: When sending goods to the service center for
repair, do not disassemble them. Clean the valve carefully
and flush the valve internals. Include the material safety
datasheet(s) (MSDS) for all media flowing through the
valve. Valves sent to the service center without MSDS
datasheet(s) will not be accepted.
For further information on spare parts and service or
assistance visit our web-site at www.metso.com/valves.
NOTE: When ordering spare parts, always include the
following information:
a. Valve catalog code from identification plate,
b. If the valve is serialized – the serial number (from
identification plate).
c. From
Figure 10, the ballooned part number, part
name and quantity required.
IMO 4/18
8
IMO-50 EN
