The connection bar inserted correctly between feedback lever and lever
spring
7. Check that the Series 195’s feedback lever is level at 50% of valve stroke. If not,
move the bracket or feedback link until it is level. Product linearity becomes work if
Series 195 is installed without being level at 50% of valve stroke.
8. Check the valve stroke. The numbers indicating the stroke are carved in the
Series 195’s feedback lever. Set the connection bar attached on the actuator clamp
to the number on the feedback lever applicable to the valve stroke, as shown in the
following picture. To set the connection bar and the number, move the bracket
attached on Series 195 or connection bar from side to side.
Installation Position of Connection Bar for Valve Stroke
9. Once the Series 195 is installed according to the above procedures, tighten the
bolts and nuts of the bracket and feedback lever connection bar completely.
Series 295 Installation
Series 295 is designed for rotary motion valves, such as Dwyer Instruments ball
and butterfly valves, using rack and pinion, scotch yoke or complex type actuators
whose stem is rotated 90°. Series 295 positioners consist of the following
components:
• Series 295 main body
• Fork lever and lever spring to attach on actuator
• 1 bracket
• Four hex bolts M8x1.25P
• Four M8 plate washers
Installing Series 295 with Bracket
Series 295 is supplied with a standard bracket. The bracket consists of two parts
and is used with a NAMUR shaft. The bracket is assembled in the factory based on
.79˝ (20 mm) of actuator stem height. If the actuator stem height is higher, such as
1.18˝ (30 mm) or 1.97˝, use the table below to check hole positions.
Ex) If H is 30 mm, A-L should be locked in H:30 hole, B-L in H:20, 30, A-R in H:30,
and H:20, 30 with bolts.
1. Typically actuator stem heights (H) are .79, 1.18, and 1.97 inches (20, 30, and
50 mm). After checking H, assemble brackets following previous guidelines. The
bracket is set at .79˝ (20 mm) in the factory.
2. Attach the bracket to the actuator using hex bolts. The diameter of the bracket
bolt holes is .24˝ (6 mm). Using spring washers or thread lock compound so the
bolts will not be loosened by vibration or impact. The direction of the bracket varies
by operating conditions, but normal direction is depicted in the following picture.
That is, when the piping of actuator and Series 295 is as shown in direction A, the
bracket hole and indicator attached on the bottom of the Series 295 main shaft
should be mounted in the same direction.
0
100
50
90
°
50 %
50
SMART POSITIONER
10
20
30
40
50
60
70
10
20
30
40
50
60
70
No
To
uch
!
Series 295 Installation Example of Fork Lever
Series 295 Installation Example of Namur Shaft
B-L
H: 20, 30
H: 20, 30
H: 50
Actuator Stem
Height (H)
20 mm
30 mm
50 mm
A-L
H: 20
H: 30
H: 50
A-R
H: 20
H: 30
H: 50
B-R
H: 20, 30
H: 20, 30
H: 50
Markings of Bolt Holes
20
Actuator Stem (H)
Actuator
After installation, operate the valve from 0 to 100% stroke using
an air filter regulator on the actuator. When the stroke is both 0
and 100%, the feedback lever should not reach to the lever stopper on the backside
of the Series 195 unit. If the feedback lever reaches the lever stopper, move
attachment of Series 195 away from the yoke center.
NOTICE
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