Ytc YT-1000R Instruction Manual

Electro-Pneumatic Positioner YT-1000 Series

ЧП Мельникова
http://kran.net.ua E-mail: [e-mail]

Instruction Manual

(YT-1000R / Rotary Type)

Electro-Pneumatic Positioner YT-1000R

ЧП Мельникова http://kran.net.ua E-mail: [e-mail]

Contents

General p11.

Features p1 2.

Specifications p13.

Ordering Symbols p24.

Structure p25.

Principle of operation p26.

Block Diagram p37.

Installation

8.
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

Air piping connection p59.

Electrical wiring p510.

11.

Adjustment

11-1. Zero adjustment p6
11-2. Span adjustment p6
11-3. Auto/Manual switch p6
11-4. Seat adjuster p7

Maintenance and check p712.

Caution and handling p813.

14. Trouble shooting p8

15. Option p9
15-1. Pilot valve with output orifice
15-2. Feedback lever type

16. Dimensions p10

Electro-Pneumatic Positioner YT-1000R

ЧП Мельникова http://kran.net.ua E-mail: [e-mail]

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 ½ Split 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

Item • Type

Air connection

Conduit

Single Acting

4 ~ 20mA DCInput Signal

250 ± 15 ΩImpedance

0.14 ~ 0.7 MpaSupply Pressure

0 ~ 90。Stroke

PT (NPT) ¼

PT (NPT) 1/8Gauge Connection

PF ½

ExiaIIBT6, ExdmIIBT6, ExdmIICT6Explosion Proof

IP66Degree of Protection

-20℃ ~ 70 ℃ (-4℉ ~ 158 ℉)Ambient Temperature

±2% F.S.Linearity

1% F.S.Hysteresis

±0.5% F.S.Sensitivity

±0.5% F.S.Repeatability

5 LPM (Sup. = 0.14 Mpa)Air Consumption

80 LPM (Sup. = 0.14 Mpa)Flow Capacity

Aluminum DiecastingMaterial

Approx 2.8kg with junction boxWeight

Double Acting

1

Electro-Pneumatic Positioner YT-1000R

ЧП Мельникова http://kran.net.ua E-mail: [e-mail]

4. ORDERING SYMBOLS

<NOTE>

• Based on temperature 20℃, absolute pressure 760mmHG and relative humidity 65%.

• Explosion Proof (ExdmIIBT6), IP66 as standard.

• Double Acting as standard.

• In standard ½ split range is available by adjusting the Span.

• Contact us except standard.

5. STRUCTURE

6. PRINCIPLE OF OPERATION

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.