Seg SP760 Series, Instruction Manual

Page: 19 / 41

Smart Positioner
SP760 Series
Ver 1.0 SHINHWA Eng.
- 18 -
3. Installation
3-1 Caution before installation
* When installing or replacing positioner equipped in actuator, please follow safety
instructions.
- Any input or supply pressure to valve, actuator and /or to other related devices
must be turned off.
- Separate by-pass valve or other device from control valve so that total system
may not be shut down.
- Make sure that there is no remaining pressure in actuator.
- Install filter regulator in positioner air supply line so that air pressure may be
maintained properly and different material may not be inserted.
- Be alert that supplying air may not be mixed with oil, water and different material.
- When installing positioner, safety work is required after input signal and air
pressure are shut down.
3-2 Tools for Installation
- Hex Wrench set
- (+) & (-) screw drivers
- Spanners for hexagonal-head bolts
3-3 Linear Positioner Installation
Linear positioner shall be installed and used on linear motion valves such as glove
or gate vale type which uses spring return type diaphragm or piston actuators.
3-3-1 Caution on installation
- When fabricating bracket and connecting to connection bar ,following 2 kind of
contents must be regulated.
- If following condition shall not be kept during the installation,
it may be affected the performance of the products such as linearity function.
Caution
▶ When the valve opening is 50% ,the feedback lever should be horizontal.
▶ When valve opening is 50%, the stem connection pin should be located
at the numeric position marked on the feedback lever that is corresponding
to the valve stroke.