PSP10
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-4890 P. 7 / 17
COMBINATION WITH VALVE
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OPERATION DISTANCE WHEN COMBINED WITH VALVE
When setting the upper-stop position and the lower-stop position, it is preferable that the operation distance becomes 80%
or less with respect to the maximum stroke of the actuator.
That is, when the valve is closed at the lower-end side of the actuator, if the maximum stroke is 40 mm and the lower-stop
position is set at the 40.0 mm position, there will be no margin for the actuator to further go down to close the valve when
valve leakage occurs. In such a case, Auto-setup may not be successfully completed.
In order to avoid such a situation, select an appropriate combination of an actuator and a valve to secure an enough opera-
tion distance. In the example below, the maximum stroke is 40 mm and thus the preferable operation distance is 32.0 mm.
Set so that the distance between the upper-stop position and the lower-stop position are within the operation distance of
32.0 mm.
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EXAMPLE OF PROPER OPERATION DISTANCE
When connecting the output stem of the actuator with the valve stem, determine their mounting position so that a proper
operation distance can be secured.
Max. Stroke: 40.0mm
32 to 36
mm (rough indication of the maximum operation distance)
Auto-setup stop position
Auto-setup stop position
Upper stop position
Valve seat surface (seating position)
Valve seat surface (seating position)
Left approx.
2 mm
Default lower stop position
Default upper stop position
When leakage occurs
When leakage occurs
（Contraction approx. 0.1 mm)
（Contraction approx. 0.1 mm)
(Left for adjusting leakage while using.)
(Left for adjusting leakage while using.)
Left approx.
2 mm
Upper-End of Max Stroke
Lower-End of Max. Stroke
Lower stop position
