
1 RG 70 en 7
❑Remove the old cage seal ring (67) from the bot-
tom of the body cavity and remains of the bonnet
seal (66). Do not scratch the sealing surfaces.
❑Clean the cage cavity of the body.
❑Mount the new cage seal to the bottom of the
cage cavity of the body.
❑Mount the cage into the body so the pin hole
sections are aligned.
❑Mount the pin (21) into the hole, make sure the
top is not above the bonnet seal surface.
❑Make sure the pin (21) is in the hole between the
cage (7) and the body before mounting the bon-
net seal.
Mount the new bonnet seal.
❑Push the shaft through the bonnet halfway to the
yoke and check the keyway edges so as not to
scratch the packing rings.
❑Mount the sheet ring (70) and support ring (23)
with the bearing strip (71) on the shaft. Mount the
net side of the sheet ring and bearing strip
against the thrust bearing. Hold the thrust bear-
ing halves onto the groove of the shaft and slide
the support ring onto the thrust bearing to lock it.
Push the shaft to the upper position. Make sure
the pin (6) head of the plug is in the recess of the
bonnet.
❑Fasten the gland (9) with the nuts (18) and
tighten them according to the Table 1.
❑Mount the bonnet with the shaft and plug to the
body, plug in closed position, so the arrows on
the body and on the bonnet point to the same
direction. Tighten the nuts (17) in a cross-tighten-
ing manner according to the Table 1.
❑Tap the key (10) to the keyway.
5 TESTING THE VALVE
We recommend that the valve body is pressure-tested
after the valve has been assembled.
The pressure test should be carried out in accordance
with an applicable standard for the pressure rating. The
valve must be in the open position during the test.
6 MOUNTING THE ACTUATOR
The actuator is attached to the valve via an ISO 5211
standard mounting interface. Several types of Metso
actuators can be used with suitable couplings. Refer to
the individual manuals for further information on their
installation, maintenance and operation.
❑Push the actuator carefully onto the valve shaft.
Avoid forcing it, since this may damage the plug
and cage. Tighten the screws of the interface,
see Table 1.
❑The cone coupling has an axial tightening screw
in E-series actuators. Make sure it is tightened
according to the intructions.
❑Adjust the closed position of the trim by means of
the actuator stop screw, see actuator instruc-
tions. The valve has an internal limit stop to find
the closed position of the valve. Unscrew the
closed position stop screw of the actuator until
the rotation of the valve shaft stops or if the valve
shaft does not rotate turn in the opposite direc-
tion until the shaft starts to rotate. Then adjust the
stop screw by one half turn so the valve rotates in
the open direction slightly. Lock the stop screw.
The Cv value marking on the valve shaft shows
the valve position: open when on the flow port
line, closed when perpendicular to the flow port
line.
❑Adjust the open position of the trim by means of
the actuator stop screw. Drive the actuator 90
degrees from the closed position. Turn the stop
screw to the contact and lock the stop screw.
❑The stop screw threads through the cylinder
heads of the actuator must be sealed using an
appropriate non-hardening sealant, e.g. Loctite
225.
7TOOLS
Removal of the actuator
❑hex socket wrench set
❑socket wrench set
❑extractor
❑cage removal tool, see Fig. 6
8 ORDERING SPARE PARTS
When ordering spare parts, always include the follow-
ing information:
❑valve type designation (from the identification
plate or documents)
❑number of the parts list (number of this manual),
part number, name of the part and quantity
required
CAUTION:
Pressure testing should be carried out using
equipment conforming to the correct pressure
class!
CAUTION:
Beware of the plug movement!
NOTE:
Always use original spare parts to make sure that the
valve functions as intended.