Rotork YT-3400 Valve Controller Positioner for Low Temperature Applications

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​