Rotork Type Valve Positioner

YT1000R Electro Pneumatic Valve Positioner-Rotork New Module

Rotork-pattern rotary positioner, new module

The Rotork YTC-pattern rotary positioner with the new internal module, aimed at loops that are specified for high control quality: it improves positioning accuracy and reliability, and handles valves with large differential pressure across the seat.

For adjustment systems that demand high control quality
Used where differential pressure across the valve exceeds 1 MPa
Raises actuator output force by raising air supply pressure
Reduces stroke error caused by unbalance forces on the plug
New-generation module on the Rotork YTC rotary mounting pattern

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Typical duty: High-Δp control valves and critical loops where stroke error has to be kept small.

Specification

YT-1000R specification (EAA Electric data sheet)
Input signal	4–20 mA DC
Impedance	250 ± 15 Ω
Supply pressure	1.4–7 kgf/cm² (20–100 psi)
Stroke	0–90°
Air connection	PT (NPT) 1/4
Gauge connection	PT (NPT) 1/8
Conduit	PF 1/2 (G1/2)
Explosion proof	Ex dm IIB T5 / Ex dm IIC T5 / Ex ia IIB T6
Protection	IP66
Ambient temperature	-20 to +70 °C operating; -20 to +60 °C explosion-proof
Linearity	±1 % F.S. single acting / ±2 % F.S. double acting
Hysteresis	±1 % F.S.
Sensitivity	±0.2 % F.S. single acting / ±0.5 % F.S. double acting
Repeatability	±0.5 % F.S.
Air consumption	3 LPM (supply 1.4 kgf/cm², 20 psi)
Flow capacity	80 LPM (supply 1.4 kgf/cm², 20 psi)
Material	Aluminium diecasting
Weight	2.8 kg (6.2 lb)
Lever type	M6×40L / M6×63L / M8×40L / M8×63L / NAMUR
Option 1	None (standard) or dome cover
Option 2	None / +PTM internal / +PTM external / +L/S internal / +L/S external / +PTM+L/S internal

Technical background

Type YT-1000R Electro-pneumatic valve positioner is used for operation of pneumatic rotary valve actuators by means of electrical controller or control system with an analog output signal of DC 4 to 20 mA or split Ranges.

YT1000R Electro Pneumatic Valve Positioner- Principle of electropneumatic positioner (1) YT1000R positioner is used in important adjustment systems that require high adjustment quality to improve the positioning accuracy and reliability of the adjustment valve. (2) Electropneumatic positioner is used in occasions where the pressure difference between both ends of the valve is large (△p>1MPa).

Increase the output force of the actuator by increasing the air source pressure to overcome the imbalance force generated by the liquid on the valve core and reduce the stroke error. When there is a deviation between the two, change its output to the actuator The signal causes the actuator to act, establishing a one-to-one correspondence between the valve stem displacement and the controller output signal.

Therefore, the YT1000 rotary positioner constitutes a feedback control system that uses the displacement of the valve stem as the measurement signal and the output of the controller as the setting signal. The manipulated variable of the control system is the output signal from the valve positioner to the actuator.

Questions buyers ask

What counts as high differential pressure here?

The source specification calls out Δp greater than 1 MPa across the two ends of the valve.

Does it fit existing Rotork YTC brackets?

It follows the Rotork YTC rotary pattern. Send the actuator model and the factory will confirm the bracket kit before shipment.

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