Ytc YT-2700L User manual

Smart Positioner YT-2700L,R Installation manual
Installation
Safety Warning
When installing a positioner, please ensure to read and follow safety instruction.
All input and supply pressure to valve, actuator, and other related devices must be turned
off.
Use bypass valve or other equipment to avoid entire system "shut down."
Make sure there is no remaining pressure in the actuator.
Tools for Installation
Hexagonal wrench①
Screw drivers (+) & (②-)
Spanners for hexagonal③-head bolts
YT-2700L Installation
YT-2700L should be installed on linear motion valve such as globe valve or gate valve using spring
return type of diaphragm or piston actuator. Before installation, be sure to check for following
installation components.
1) Proper bracket must be made in order to attach positioner on the actuator yoke. Please
consider following when making a bracket.
①Feedback lever should be leveled at 50% of the valve stroke. (Refer to Step 7)
②Feedback lever connection bar of actuator clamp should be installed at the positioner
that the valve stroke and numbers which indicated on the feedback lever must be fitted.
(Refer to Step 8)
2) Attach YT-2700L to the bracket, which was made in earlier
step, by using bolts. <Figure 2> Please refer to backside of
the product for size of the bolts. The standard size of bolt is
M8 x 1.25P, and other bolt sizes are available. Please
contact YTC sales department.
Young Tech Co. #662-8 PumgMu Dong, Kimpo City, (415-809) Korea [phone] www.ytc.co.kr

Smart Positioner YT-2700L,R Installation manual
3) Attach YT-2700L (with bracket) to the actuator yoke – DO NOT TIGHTEN COMPLETELY.
4) Connect YT-2700L feedback lever to the actuator clamp. The gap on the YT-2700L
feedback lever is 6.5mm. The connection bar thickness should be less than 6.3mm.
<Figure 3>
5) Connect air filter regulator to the actuator temporarily. Set supply pressure of the regulator in
order to position the actuator clamp at 50% of valve stroke. <Figure 4>
6) Insert connection bar into the YT-2700L feedback lever. The connection bar should be
inserted at the 50% point on the feedback lever, which would help to reduce hysteresis.
7) If connection bar does not point at 50% point, then adjust bracket or feedback link bar
position. Failure to position at 50% would lower the linearity of the poistioner. <figure5>
Young Tech Co. #662-8 PumgMu Dong, Kimpo City, (415-809) Korea [phone] www.ytc.co.kr

Smart Positioner YT-2700L,R Installation manual
8) Check valve stroke. The stroke numbers are indicated on the feedback lever. Position
connection bar at the number on the feedback lever according to the valve stroke.
<Figure 6> To adjust, move the bracket or the connection bar.
Note
After installing YT-2700L, operate the valve from 0% to
100% stroke by using air filter regulator on the
actuator. Both of 0% and 100%, the feedback lever
should not touch the lever stopper, which is located on the
backside of YT-2700L. <Figure 7> If the feedback lever
touches the lever stopper, YT-2700L should be installed
further away from the center of the yoke.
9) After the proper installation, tighten all of the bolts on the
bracket, the feedback lever, and the connection bar.
YT-2700R Installation
YT-2700R should be used for rotary motion valve, that is ball valve, butterfly valve using rack and
pinion, scotch yoke or complex type actuator, which its stem rotates 90 degrees. Before installation,
be sure to check for following installation components.
YT①-2700R main body
Fork lever and lever spring②
1 set of bracket③
4 pcs of hexagon head bolts (M8 x 1.25P)④
4 pcs of M8 plate washer⑤
YT-2700R Installation Example
Young Tech Co. #662-8 PumgMu Dong, Kimpo City, (415-809) Korea [phone] www.ytc.co.kr

Smart Positioner YT-2700L,R Installation manual
Bracket Information
YT-2700R is supplied with standard bracket which would fit to actuator stem of 20mm. For other
height of the stem, please make brackets according to the different height.
1) Attach bracketed YT-2700R to the actuator by using hexagon-headed and wrench bolts.
Size of the bracket hole is 6mm. When tightening bolts, please use spring washer or similar
for firm attachment to the actuator, so YT-2700R will not be affected by vibration or any other
impact.
2) Set rotation position of the actuator stem at zero point, “0%”. For a single type of actuator, it
is easy to check zero point, because the actuator stem is positioned at zero point when there
is no supply pressure. If double acting actuator is used, check actuator stem’s rotation
direction (clockwise or counter-clockwise) by supplying pressure.
3) Install the fork lever as shown below after setting actuator stem at zero point. Check the
direction of the actuator stem – clockwise or counter-clockwise. Installation angle of the fork
lever should be 45 degrees based on the linear shaft. For NAMUR shaft, the angle does not
matter.
4) After setting fork lever position, assemble lock nuts which are located on the bottom of the
fork lever. Make sure to set the height of upper fork lever between 6-11 mm, which is lower
than upper bracket height.
Young Tech Co. #662-8 PumgMu Dong, Kimpo City, (415-809) Korea [phone] www.ytc.co.kr

Smart Positioner YT-2700L,R Installation manual
Young Tech Co. #662-8 PumgMu Dong, Kimpo City, (415-809) Korea [phone] www.ytc.co.kr
5) Attach YT-2700R to the bracket. Fix the clamping pin on the main shaft’s center of YT-
2700R and insert connection bar into the fork lever slot, so it can be locked to the fork lever
spring. This sets the alignment of the main shaft of YT-2700R and center of the actuator
stem. Bad alignment of the main shaft and the actuator stem lowers YT-2700R’s durability,
because too much force will be on the main shaft of YT-2700R.
6) Tighten YT-2700R base and the bracket with hexagon-headed bolts and plate washer. It is
recommended to tighten four bolts after checking YT-2700R's position.