Structure
The structure of the 185 is shown below. The Series 285 structure is the same as
the linear model without the feedback lever.
Installation
Note: When the positioner is replaced or installed with the actuator, make sure of
the following:
-All inputs and supply pressure to the valve, actuator and other instruments must
be shut down.
-The control valve must be separated from the system with a bypass valve or other
equipment so that the entire system does not shut down.
-No pressure remains in the actuator.
Tools For Installation
• Hexagonal wrenches
• (+) Screw driver
• (-) Screw driver
• Spanners for hexagon head bolts
Series 185 Installation
Series 185 is used for linear motion valves such as Dwyer Instruments’ globe
valves using a spring return type diaphragm actuator or piston actuator. The Series
185 consists of the following components. Be sure that all the components are
included.
1. Series 185 main body
2. Feedback lever and lever spring
3. Flange nut (attached on the bottom of main shaft of Series 185 body)
4. Four hexagon head bolts M8x1.25P
5. Four M8 plate washers
Installing Series 185 with Bracket
It is necessary to make a proper bracket to attach on the actuator yoke.
The most important considerations in the design of the bracket are as follows:
- Series 185 feedback lever should be at 50% of valve stroke.
- Feedback level connection bar of actuator clamp should be connected in the
position so that the valve stroke and the numbers carved on feedback lever are
fitted. If the bracket meets the above conditions, Series 185 can be installed very
easily.
2. Assemble Series 185 and bracket with bolts. Use standard bolts in bolt holes on
the backside of the unit.
Installing Series 185 with Bracket
3. After assembling Series 185 and bracket with bolts, attach it using bolt holes of
actuator yoke. Do not tighten completely, there must be some space.
4. Install bar connected with Series 185’s feedback lever on the actuator clamp.
The slot length between Series 185’s feedback lever is .26˝ (6.5 mm), so the
diameter of the connection bar should be less than .25˝ (6.3 mm).
5. Connect the air filter regulator with the actuator temporarily. Set supply pressure
of air filter so that the actuator clamp is positioned at 50% of valve stroke.
LCD SCREEN
SMART POSITIONER
0
100
50
LCD SCREEN
SMART POSITIONER
