Output Drive Type A - AUMA SAEx 25.1 Operation Instructions Manual

5.3.2 Output drive type A

Figure 12: Design of output drive type A
[1]
[2]
[3]
[1]
[3]
Short description Output drive type A consisting of output mounting flange [1] with axial bearing stem
nut [2]. The stem nut transmits the torque from the actuator hollow shaft to the valve
stem [3]. Output drive type A can withstand thrusts.
5.3.2.1 Mount multi-turn actuator with output drive type A
1. If output drive type A is already mounted to the multi-turn actuator: Loosen screws
[3] and remove output drive type A [2].
Figure 13: Multi-turn actuator with output drive type A
[2]
[3]
(2a)
[1]
(2a)
(2c)
For an unbored or pilot bore stem nut, the stem nut must be finish-machined prior
to mounting valve stem and prior to performing the following steps:
ing of stem nut for output drive type A [} 17]
2. Apply a small quantity of grease to the valve stem.
Output mounting flange
Valve stem
[1]
Multi-turn actuator
Finish machined with thread
Pilot bore
[2] Stem nut with dog coupling
(2b)
(2c)
[2] Output drive type A, from left to right
(2b) Unbored
[3] Screws to multi-turn actuator
Assembly
Finish machin-
15