4. Turn the stop screw (12.1 or 12.2, de-
pending on the direction of rotation) un-
til the valve is completely open at 90°.
Align the markings on the shaft with the
markings on the gland flange.
5. Secure the position of the stop screw
with its lock nut.
6. Apply a signal pressure to match the
number of springs (see nameplate) to the
loading pressure connection.
7. Turn the other stop screw until the valve
is completely closed.
Align the markings on the shaft with the
markings on the gland flange.
8. Secure the position of the stop screw
with its lock nut.
2.1.2 Type 3331/3278
If the valve and actuator have not preassem-
bled by the manufacturer, the actuator is
mounted either to the flange
1
or
2
de-
pending on the fail-safe position.
The digit
1
or
2
is cast on the flange on the
corresponding side of the body.
The rotary actuator can be mounted either
vertically or horizontally on the valve and
may be positioned at 90° around the valve
as required by the on-site conditions over
four feather key grooves arranged in stages
of 90° around the actuator shaft.
Valve CLOSED without supply air
1. Undo both stop screws (13.1 and 13.2)
at the actuator. Rescrew stop screw
(13.2) to the point where the grooves of
the actuator shaft are positioned verti-
cally or horizontally to the actuator axis.
2. Place disc (8) in closed position (0°
angle of rotation).
3. Fasten yoke (3) with 2 or 4 screws de-
pending on the nominal size of the valve
to the flange of the shaft (4).
4. Slide actuator over shaft (4) and fasten
tight at yoke (3) using the four screws.
5. Undo stop screw (13.2) again.
6. Turn the stop screw (13.2) until the valve
is completely closed.
Align the markings on the shaft with the
markings on the gland flange.
7. Apply the signal pressure required for
the spring range (see nameplate) to
achieve the opening position.
8. Turn the stop screw (13.1) until the disc
(8) reaches the open position (90° or
70° angle of rotation).
9. Secure the position of both stop screws
with their lock nuts.
Valve OPEN without supply air
1. Undo both stop screws (13.1 and 13.2)
at the actuator. Rescrew stop screw
(13.1) to the point where the grooves of
the actuator shaft are positioned verti-
cally or horizontally to the actuator axis.
2. Place disc (8) in open position (90°
angle of rotation).
EB 8227 EN
7
Installation
Содержание 3331/3278
Страница 11: ...EB 8227 EN 11...
