Ytc YT-1000R User manual

Electro-Pneumatic Positioner YT-1000 Series
Instruction Manual
(YT-1000R / Rotary Type)
ЧП Мельникова
http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
Contents
Caution and handling p813.
Maintenance and check p712.
Adjustment
11-1. Zero adjustment p6
11-2. Span adjustment p6
11-3. Auto/Manual switch p6
11-4. Seat adjuster p7
11.
Electrical wiring p510.
Air piping connection p59.
Installation
8-1. Example of attaching to actuator p3
8-2. Connection with feedback shaft p3
8-3. Cam attaching procedure p4
8-4. Attaching procedure of opening degree p4
indication plate
8.
Block Diagram p37.
Principle of operation p26.
Structure p25.
Ordering Symbols p24.
Specifications p13.
Features p1 2.
General p11.
16. Dimensions p10
15. Option p9
15-1. Pilot valve with output orifice
15-2. Feedback lever type
14. Trouble shooting p8
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

1
Electro-Pneumatic Positioner YT-1000R
1. GENERAL
The electro-pneumatic positioner YT-1000R is used for rotary operation of pneumatic rotary valve
acuators by means of electrical controller or control systems with an analog output signal of
4 to 20 mA or split ranges.
2. FEATURES
•There is no resonance in the range of 5∼200Hz.
•Performing ½Split Control without any other substitutes.
•Easy to adjust zero and span.
•Easy to convert from Reverse Action to Direct Action or vice versa.
•Easy Feedback Connection.
•Fast and accurate response.
•Low air consumption.
•Easy to protect from hunting effect by using output orifice in small size of actuator.
•Designed as block build structure for maintenance and repair.
3. SPECIFICATIONS
Double Acting
Approx 2.8kg with junction boxWeight
Aluminum DiecastingMaterial
80 LPM (Sup. = 0.14 Mpa)Flow Capacity
5 LPM (Sup. = 0.14 Mpa)Air Consumption
±0.5% F.S.Repeatability
±0.5% F.S.Sensitivity
1% F.S.Hysteresis
±2% F.S.Linearity
-20℃ ~ 70 ℃ (-4℉ ~ 158 ℉)Ambient Temperature
IP66Degree of Protection
ExiaIIBT6, ExdmIIBT6, ExdmIICT6Explosion Proof
PF ½
Conduit
PT (NPT) 1/8Gauge Connection
PT (NPT) ¼
Air connection
0 ~ 90。Stroke
0.14 ~ 0.7 MpaSupply Pressure
250 ± 15 ΩImpedance
4 ~ 20mA DCInput Signal
Single Acting
Item •Type
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

4. ORDERING SYMBOLS
Electro-Pneumatic Positioner YT-1000R
<NOTE>
•Based on temperature 20℃, absolute pressure 760mmHG and relative humidity 65%.
•Explosion Proof (ExdmIIBT6), IP66 as standard.
•Double Acting as standard.
•In standard ½split range is available by adjusting the Span.
•Contact us except standard.
5. STRUCTURE
Increase the input current signal to change
in lift position of valve. Force exerted by
①Torque Motor reduces Nozzle Back
Pressure with increase in gap between
between ②Flapper and ③Nozzle. Then
⑤Spool moves upward and the ⑦Seat opens
simultaneously. Air pressure of OUT1 pipe
is discharged to ⑩Actuator. As pressure
in the actuator chamber goes up, ⑫Actuator
stem start to rotate. The movement of
⑫Actuator stem exerted force to the
ⓐFeedback Spring through Feedback Shaft
connections. Then ⑩Actuator will stop at
the point of force balance exerted by the
input current signal and the feedback spring.
6. PRINCIPLE OF OPERATION
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

7. BLOCK DIAGRAM OF YT-1000R
Electro-Pneumatic Positioner YT-1000R
8. INSTALLATION
8-1. Example of attaching to actuator
Attach to the position at which the positioner
feedback shaft and the rotary actuator main
shaft are almost concentric (range in which
the spring pin of feedback shaft edge enters
the hole of fork lever assembly shaft edge).
8-2. Connection with feedback shaft
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
8-3. Cam attaching procedure
(1) Use the DA face of cam to turn
the actuator main shaft clockwise
(viewed from the positioner front
cover side) at the time of input
feedback shaft. Use the RA face to
turn it counter-
clockwise (reverse action). Correctly
attach the cam to the flange part of
feedback shaft.
(2) Attach the cam in the procedure of loosening the hexagonal nut with flange
first, setting the using actuator to the starting position and then setting the
cam reference line and the bearing contact point of span adjusting arm unit to
the matching position.
(3) Do not apply the supply pressure when attaching the cam as otherwise it is
very dangerous.
(4) When the positioner is shipped out of our plant, the cam is tentatively
tightened to the shaft. Be sure to firmly lock the cam to the lock nut.
(tightening torque 2.0 ∼ 2.5 Nm (20 ∼ 25 kgfcm).
8-4. Attaching procedure of opening degree indication plate
Lock the cam and then
adjust the zero point and
span. Then fix the
opening degree indication
plate to the shaft using
the M3 screw provided.
At the time, set the
opening degree indication
plate to the state of
attaching reference line.
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
9. AIR PIPING CONNECTION
cFully purge the pipe to remove foreign matter.
dUse a clean supply air fully removed humidity and dust.
eUse YT-200 filter regulator to keep supply air pressure constantly.
fWhen using the double acting type as the single acting type, blind either
OUT1 or OUT2 and also remove the pressure gauge to close its connection.
10. ELECTRICAL WIRING
cConnect the (+) and (-) output terminals from the regulator with the (+) and
(-) input terminals, respectively, of the positioner Junction box.
dFor Explosion Proof, both pressure tight conduit thread connection type and
pressure tight packing type are available.
cUse Cable Gland in pressure tight packing type. (Cable O.D.= 9.0∼ 11).
dUse PF ½standard for conduit thread connection type.
eClose Junction box cover and lock Key lock screw.
fThere is a Spare Bolt in terminal board.
ExdmIIBT6 ExiaIIBT6
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
11. ADJUSTMENT
Check the following prior to starting the adjustment.
cCheck that the pipeline is correctly connected with the pressure supply port and
OUT1 and OUT2 port.
dCheck that the wires are correctly connected with the (+), (-) and grounding
terminals.
eCheck that the actuator and positioner are sturdily connected.
fCheck for locking of the auto/manual changeover screw of pilot valve (fully
tightened in the clockwise direction).
gCheck that the span adjusting lever of internal feedback lever is attached to the
correct (Direct or Reverse) position.
hCheck for correct use of the cam face (Direct or Reverse) and that flange nut
is firmly locked.
11-1. Zero Adjustment
cSet an signal to the Stroke starting signal(4mA)
then turn the Zero Adjuster clockwise or
counterclockwise.
dIn case of Spring Actuator, check if it is set to
standard pressure in Zero Point. If not, repeat
Zero adjustment.
cAdjust Range Adjustment so that an Actuator
stops at 0% position of the Stroke by the 0%
applied input signal and 100% position for
100% input signal respectively.
dCheck Zero Point and repeat Zero Span
Adjustment.
1/2 Split Range can be used by Zero and
Span Adjustment.
fAfter Setting, tighten up Lock Screw of
Span adjustment.
11-3. Auto / Manual Switch
11-2. Span Adjustment
cThis is a Switch for changing Auto and Manual.
dShipped products is set for Auto. To use Manual operation, turns A/M Switch
counterclockwise.
eIn manual operation, the pressure of YT-200 regulator connects to Actuator.
After using, return switch to "A".
fNot available for Single Acting-OUT2 and Double Acting.
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
11-4. Seat Adjuster
cNo need to adjust at the field because Seat Adjuster
is to be adjusted before shipment for balanced
pressure point of output pressure.
dSeat Adjuster is always used for Double-acting.
If need to change balanced pressure point of output
pressure, use Seat Adjuster.
eIf the sensitivity is poor because of the actuator
type of load condition, turn the seat adjuster
screw clockwise. If hunting occurs, turn the seat adjuster
screw counter-clockwise.
(The amount of turning varies by actuators. Do not loosen the stopper screw
at this time since it is set to avoid coming off the seat adjuster.
fIf hunting occurs due to an actuator of small capacity, refer to description in
chapter 15. OPTION.
12. MAINTENANCE AND CHECK
cIf the supply air is fouled, the positioner may not operate normally.
Periodically check the compressed air cleaning system and make sure that clean air is always
supplied.
dWhen you disassemble the pilot valve, coat grease to the O-ring of the sliding section.
eWhen the fixed orifice is clogged with carbon particles or others, remove the pilot valve
Auto/Manual changeover screw (built-in fixed aperture) and clean it by inserting a 0.2 wire
into the aperture. If it must be replaced with new one, stop the supply pressure and remove
the stopper screw of the pilot valve.
fCheck the positioner once a year. When you find excessively worn diaphragm,
O-ring and other packing or any unit, it should be changed with new one.
Treatment at an early stage is especially import if the positioner is used in a place of severe
environment like coastal area.
ЧП Мельникова http://kran.net.ua E-mail: [email protected]

Electro-Pneumatic Positioner YT-1000R
13. CAUTION AND HANDLING
cDo not apply large vibration or impact to the positioner. It causes trouble.
The positioner must be handled very carefully during transportation and operation.
dIf the positioner is used under temperature outside of the specification, the sealing
materials deteriorate quickly and also the positioner may not operate normally.
eDo not remove the terminal cover at a dangerous position during power conduction.
fBe sure that the terminal cover and body cover are put on during the operation.
gIf you leave the positioner at the operation site for a long time without using it, put the
cover on it so that the rain water does not enter the positioner.
If the atmosphere is of high temperature or high humidity, take measures to avoid
condensation inside. The condensation control measures must be taken thoroughly for
export shipment.
14. TROUBLE SHOOTING
Replace Cam Shaft Cam shaft is worn out
Tighten connection
Loose connection of actuator and
poisitioner
Readjust Seat adjusterWrong setting of Seat Adjuster
Hysteresis is not good
Replace regulatorSupply pressure is unstable
Readjustment of Zero, Span
Adjustment
Wrong Zero, Span adjustment
Readjust setting of feedback leverWrong setting of feedback lever
Linearity is not good
Correct position of tube
Wrong connection of OUT1 and
OUT2 tube
Actuator is operated by
On/Off only
Clean or replace fixed orificeClogged fixed orifice
Insert orificeToo low of actuator volume
Insert stabilizer springOff-positioned stabilizer spring
Hunting is occured
Clean nozzle or repalce Motor
Unit
Clogged nozzle
Output pressure is operated
by A/M Switch only
Clean or replace fixed orifice Clogged fixed orifice
Replace Motor UnitWrong contact or search of Flapper
Tighten or replace A/M switchLeakage of A/M switch
OUT1 pressure raised
And stay, does not
Come down
Correct setting and tighten
Loose or wrong setting of Feedback
Lever
Replace Motor UnitClogged Nozzle
Replace Motor Unit
Short or open circuit of terminal
Motor
Connect wiring (+) and (-)Wrong wiring for (+) and (-)
Tighten set screw of TerminalLoose connection
Input supply airToo low or none supply air
Not operated with Input
Signal applied
What to doCauseCondition
ЧП Мельникова http://kran.net.ua E-mail: [email protected]