Data Sheet for Product

Technical Instructions Flowrite 599 Series SKB/C Electronic Valve Actuator Proportional Control
Document Number 155-163P25
September 25, 2018
Page 8 Siemens Industry, Inc.
Start-up,
continued
Three-way Valve
Actuator pressure cylinder moves:
• Outward (0 to 1): Valve opens between ports NC and C.
• Inward (1 to 0): Valve opens between ports NO and C.
Figure 11. Valve Stem Travel Indication.
Manual operation
Release the crank arm of the manual setting knob located on the top of the actuator.
See Figure 12.
A red scale appears in a window in the manual setting knob as you turn the crank
clockwise, (see Figure 12). This scale indicates the effective valve stroke in millimeters.
Each complete revolution (360°) is equal to 2 mm of stroke. The numbers 2 to 20 or 2 to
40 are visible depending on the stroke of the actuator.
If a signal is sent to the actuator while it is in manual operation, the actuator will move
but the control will not be accurate. The valve cannot be commanded to its 0% position
while in manual operation.
Figure 12. Manual Operation.
CAUTION:
Do not attempt automatic operation of the actuator when the red scale is
visible.