Limitorque SMB-5T User Manual

01-472-0007-3
SMB/SB Installation and Maintenance Manual 140-11000 • July 2003 4-6
Flow Control Division
Limitorque Actuation Systems
4.4.2 Four-Train Geared Limit Switch
The rotor-type, four-train geared limit switch employs four rotary drum switches. Each rotary drum switch contains four contacts.
When the rotor is properly set to trip at the desired position, two of these contacts open electric circuits and two of the contacts close
electric circuits. One rotor is set to trip at the full open position of the valve, and one rotor is set to trip at the full close position of the
valve. The other two rotors are set at some intermediate position depending on the application.
For the geared limit switches to trip at any desired position, follow the steps in Section 4.4.1, Two-Train Geared Limit Switch, with
the exception that the piece numbers refer to Figure 4.2 and Table 4.4.
NOTE: The upper Set Rod (piece #48) allows adjustment of the two adjacent upper rotors, and the lower Set Rod (piece #48) allows
adjustment of the two adjacent lower rotors.
Figure 4.2 – Four-Train Geared Limit Switch – Rotor-Type
6148
54
41
53
43
46
51
2930
27
2834
35212625
22 23 26 24 31 32 55 52 44 58 45 42 57 47 50 4968
69
65
64
63
67 66
56
62
63

Limitorque SMB-5T Specifications

General

Brand	Limitorque
Model	SMB-5T
Category	Controller
Language	English