Detaching And Installing The Actuator; General; Detaching The B1 Series Actuators; Detaching The Ec And Ej Actuators - Metso Neles L4 Series Intallation, Maintenance And Operating Instructions

12
Table 11. Pressing the pins, forces kN
Pin diameter, Force, kN
mm
5 45
6 70
8 95
10 140
12 200
15 300

Install the gasket (18) and the blind flange (10).
Tighten the screws (26) lightly.

Then tighten the screws (26) crosswise and evenly.
First to 50 % of recommended torque, then to 100 %.
Recommended torque values for screws are listed in
Table 10.

Install the seat ring. See details in Section 5.5.

Install the body seal (19) and the clamp ring (2). See
details in Section 5.5.

Install the gland packing (see Section 5.3).

Check the contact line between the seat ring and the
disc (see Fig. 14).
6 DETACHING AND INSTALLING THE
ACTUATOR
6.1

General

CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
CAUTION:
The actuator must not be removed from the valve in a
pipeline under pressure as result of dynamic torque!
CAUTION:
Do not detach a spring-return actuator unless a stop-
screw is carrying the spring force!
NOTE:
Do not turn the disc more than 90° as this could damage
the seat. The valve is so constructed that the disc operates
only between 0-90°.
NOTE:
Before dismantling, carefully observe the position of the
valve with respect to the actuator and positioner/limit
switch so as to ensure that the package can be properly
reassembled.
The actuator is factory-mounted on the valve and the
stroke limit stop screws are adjusted in advance.
6.2

Detaching the B1 series actuators


Disconnect the actuator from its power source;
detach the air supply pipe and control signal cables
or pipes from their connectors.

Unscrew the bracket screws.

Detach the actuator using a suitable extractor. The
correct tool can be ordered from the manufacturer
(see Fig. 20).

Remove the bracket and coupling, if any.
Pin diameter, Force, kN
mm
20 500
25 780
30 1125
35 1500
40 2000
50 3150
Fig. 20. Actuator removal, B1 series
6.3

Detaching the EC and EJ actuators


Disconnect the actuator from its power source;
detach the air supply pipe and control signal cables
or pipes from their connectors.

First detach the positioner, or any other accessory,
from the actuator, and detach the coupling plate
from the drive shaft. Next, the bushing is loosened
by turning the tightening screw counter-clockwise.
The tightening screw also acts as an extractor. It is
highly recommended to use a suitable bushing from
the tool set H061544 between the tightening screw
(I) and drive shaft. The bushing dimensions are given
in Table 12.

Detach the actuator finally from the valve after the
screws that attach the actuator to the valve have
been removed.
Fig. 21. Detaching the EC/EJ actuator
Table 12. Bushing dimensions
Actuator Outer dim. (mm)
EC/EJ05 24.5
EC/EJ07 24.5
EC/EJ10 24.5
EC/EJ12
6.4

Installing the B1 series actuator


Turn the valve to the closed position before mount-
ing the actuator.

Clean the shaft and the shaft bore and file off any
burrs which could interfere with mounting. Protect
the joint surfaces from corrosion, e.g. with Cortec
VCI 369 or an equivalent anti-corrosive agent..
2 L6 70 en
Height
Inner dim. (mm)
(mm)
12.5 15
16.5 32.75
20.5 45