5.
Mounting multi-turn actuators SAI and SAN
Mounting multi-turn actuators to gearboxes is described in the operation
instructions pertaining to the multi-turn actuator.
Mounting the multi-turn actuator:
.
Thoroughly degrease the faces of the bearing flange at actuator and of the
input flange at spur gearbox.
.
Place the multi-turn actuator on the spur gearbox.
.
Ensure that the spigot mates uniformly in the recess and that the mounting
faces are in complete contact.
.
Fasten actuator with screws and lock washers (see table 1) at the flange
of the spur gearbox.
.
Fasten screws crosswise with a torque according to table 2.
Do not attach ropes or hooks for the purpose of lifting the
actuator by hoist to the handwheel. If multi-turn actuator is
mounted on gearbox, attach ropes or hooks for the purpose
of lifting by hoist to gearbox and not to multi-turn actuator.
6
Multi-turn gearbox GSTI 25.1 – GSTI 40.1 qualified for use in nuclear power plants
(Inside and Outside Containment)
Operation instructions
Figure 2: Mounting multi-turn actuators onto spur gearboxes
Input flange
Bearing flange
Gearboxes
SAI 50-F14/G1/2
SAN 14.5-F14/G1/2
SAI 100-F16/G3
SAN 16.1-F16/G3
SAN 25.1-F25/G4
Screw
Pcs.
Screw
Pcs.
Screw
Pcs.
GSTI 25.1
M16 x 40
4
–
–
GSTI 30.1
M16 x 40
4
M20 x 50
4
–
GSTI 35.1
M16 x 40
4
M20 x 50
4
–
GSTI 40.1
–
M20 x 50
4
M 16 x 50
8
Table 1: Screws for mounting AUMA multi-turn actuators onto spur gearboxes
