Rotork YT-3400LSZ3520S, YT-3400RDZ5501S Direct/Angular Stroke Valve
Controller Positioner
Product Introduction
The Rotork YT-3400LSZ3520S and YT-3400RDZ5501S are direct/angular
stroke valve controller positioners, available in a low temperature
type. These smart positioners are designed to accurately control
valve stroke in response to a 4~20mA input signal from the
controller. Equipped with a built-in microprocessor, they optimize
performance and offer unique functions such as Auto-Calibration,
PID Control, and HART Protocol Communications (optional).
Suitable for various industrial environments, including explosive
gas atmospheres and high vibration conditions, these positioners
ensure reliable valve control. Their modularized inner structure
facilitates easy maintenance, and they come with a range of
features that enhance system safety, reduce operating costs, and
provide flexibility in different applications.
Product Features
Explosive Environment Compatibility: The LCD can be checked and
buttons operated without opening the cover, allowing parameter
adjustment and use of various functions in explosive gas
atmospheres. The 4-button operation is consistent across all
firmware interface modes, ensuring user-friendliness.
Rapid Recovery: In case of a momentary blackout, the positioner has
a boot-time of only 0.5 seconds, minimizing valve travel and
increasing system safety.
Stable Operation: Functions normally even with sudden changes in
supply pressure and in high vibration environments, ensuring
consistent performance.
Simple Auto-Calibration: Features an easy-to-use Auto Calibration
method, simplifying setup and maintenance.
Cost-Effective: Has very low air consumption, significantly
reducing operating costs in large-scale plants.
Wide Compatibility: Compatible with most controllers, enhancing its
versatility in different control systems.
Optimized Operation: Variable orifice can be used to minimize
hunting and optimize operating conditions.
HART Communication (Option): Enables processing of various
positioner information via HART communication, facilitating remote
monitoring and control.
Stable Valve System: Outputs an analog feedback signal, improving
the stability of the valve system.
Adjustable Valve Characteristics: Allows adjustment of different
valve characteristics - Linear, Quick Open, Equal Percentage, and
Custom (with 18-point characterization).
Shut Settings: Tight Shut – Close and Shut - Open can be set,
ensuring precise valve closure and opening.
Field-Adjustable PID Parameters: PID parameters can be adjusted in
the field without additional communicators, simplifying on-site
tuning.
Manual Operation: A/M switch enables direct supply of air to the
actuator or manual operation of the positioner/valve without a
signal, providing flexibility in emergencies.
Split Range Setting: Split range 4~12mA or 12~20mA can be set,
adapting to different control requirements.
Wide Temperature Range: Operating temperature ranges from -30 ~ 85℃
or -40 ~ 85℃ (check certified explosion-proof ambient temperature
for specific models).
Hand Calibration: Manual calibration function allows setting Zero
point or End point manually.
Protection Grade: IP66 protection grade, ensuring resistance to
dust and water ingress.
Corrosion Resistance: Epoxy polyester powder coating resists
corrosion (except YT-3450).
Easy Maintenance: Modularized inner structure simplifies
maintenance, reducing downtime.
Safety Certification: SIL2 certified (refer to the SIL Safety
Instruction on the homepage for more details).
Product Parameters
Model Numbers: YT-3400LSZ3520S, YT-3400RDZ5501S
Brand Name: Rotork
Type: Direct/Angular Stroke Valve Controller Positioner (Low
Temperature type)
Acting Type: Single, Double
Lever Type: 10 ~ 40 mm
Rotary: M6 x 63L
Input Signal: 4~20mA
Operating Temperature Range: -30 ~ 85℃ or -40 ~ 85℃ (check
certified explosion-proof ambient temperature)
Protection Grade: IP66
Certification: SIL2 certified
Communication (Option): HART Protocol
