Chapter 7. Disassembly and Reassembly of Model PSA6
Spring Type Piston Cylinder Actuator
7-1. Overview
Structure
This actuator consists of a cylinder, a spring unit, a lift stopper, a spring holder, hex staybolts, a
yoke, a handwheel, and a single-acting positioner.
For an external view of the actuator, refer to
“Figure 7-1. Exterior of PSA6R”.
(1) Without manual handwheel (2) With manual handwheel
Figure 7-1. Exterior of PSA6R
Mounting on the Valve Body
Mount the yoke on the valve body with the assembly nuts that are supplied with the valve
body. Connect the actuator rod and the valve stem with the stem connector.
Air piping
When using the PSA6 as part of a control valve, install a single-acting positioner and connect
the air piping to it. For details on single-acting positioners, refer to the user’s manuals below.
• Pneumatic single-acting valve positioner (model HTP):
document No. OM2-8310-0200
• Pneumatic single-acting valve positioner (model VPE):
document No. OM2-8310-0410
• Smart valve positioner (model AVP300/301/302 (integral type)):
document No. CM2-AVP300-2001
• Smart valve positioner (model AVP200/201/202 (remote type)):
document No. CM2-AVP300-2001
• Smart valve positioner (model AVP701/702):
document No. CM2-AVP702-2001
• Smart valve positioner (with fieldbus)(model AVP703):
document No. CM2-AVP703-2001
7-1
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