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Section 5: Torque Switch TSC and TSO Setting
September 2018
5.2
Adjust with Screwdriver
The only tool required for torque adjustment is a screwdriver. To change setting:
push screwdriver down about 1/16" and rotate.
Figure 11
5.3
Approximate Torque Spring Chart
See Bettis supplied specification sheet for approximate torque spring settings.
Manufacturing tolerances affect the torque at a specific torque switch setting.
If exact torque curve is required; at an additional charge, Bettis will test and plot curve for
specific actuator.
5.4
Torque Switch Calibration
5.4.1
To set CLOSE Torque Switch (TSC)
14
a.
Close valve using handwheel. Set valve to the desired torque. Observe
rotating dial for number that corresponds to desired Valve Close Torque.
b.
Insert screwdriver in slot of TSC dial. Press down to disengage and turn
the arrow to the setting determined in a). Release at this point and it will
re-engage and remain set automatically.
c.
Back the valve away from Close position and reseat by handwheel to verify
the trip point is at desired setting. The trip point of switch is distinctive as
it makes or breaks contact.
Installation and Maintenance Manual
E2K-401-0918 Rev. 1
Torque Switch TSC and TSO Setting
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