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Instruction Manual
D104304X012
Installation
The actuator is normally shipped mounted on the valve body. Follow the applicable EWNS or HPNS valve instruction
manual when installing the control valve in the pipeline. For information on mounting valve accessories, refer to the
appropriate valve accessories instruction manual.
WARNING
Always wear protective gloves, clothing, and eyewear when performing any installation operations to avoid personal
injury.
Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
If installing into an existing application, also refer to the WARNING at the beginning of the Maintenance section in this
instruction manual.
WARNING
If the control valve and actuator are installed with the actuator in any position other than vertical, the actuator may not
conform with safety‐related qualifications. Certain nonvertical orientations can cause water to collect in the yoke and
actuator spring areas, eventually causing degradation in product performance.
Note
The ATI actuator with Fisher NS2 yoke is intended to mount directly to the valve bonnet.
Mounting the Actuator on the Valve
NOTICE
The ATI SRE actuator spring load pushes the stem down out of the actuator yoke, and it can contact the valve stem during
actuator mounting. It is possible to damage valve stem threads or bend the valve stem.
It may be necessary to apply a temporary loading pressure to the actuator to move the actuator stem away from the
valve during installation. See the Disassembly section of this manual.
WARNING
When moving the actuator stem with loading pressure applied, exercise caution to keep hands and tools out of the
actuator stem travel path. If the loading pressure is accidentally disconnected, personal injury and property damage may
result if something is caught between the actuator stem and other control valve parts.
Adjustments
Bench Set
The ATI Assembly has a pre-loaded spring; therefore, there is no bench set adjustment.
ATI Piston Actuator
June 2023
5
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