Intrinsically Safe Explosion Proof Control Valve Positioner Single Acting Failsafe C45DY-RSA

Smart valve positioner, dust explosion-proof ExtD, angular stroke, single acting, failsafe, stainless steel corrosion-resistant

A valve positioner is the interpreter between the control valve assembly and the control system. It translates output signals from the control system and adjusts the air to the actuator, which moves the valve to the position requested by the control system (Figure 1). The positioner may also take position feedback from the valve stem/shaft and send that information back to the control system.

Valve positioners can help to overcome high valve friction, as well as reduce deadband (during which there is no valve movement) and hysteresis. The higher the friction, the more deadband associated with the control valve. Mechanical feedback from the valve assembly to the positioner enables the positioner to vary its output to overcome the friction and provide accurate control. For example, if the positioner receives a 50% input signal, it will provide whatever air output is required to move the valve to the midpoint of its range of travel. A positioner must be used with a piston actuator (with or without springs) to provide throttling control.

Product application field

TORLEO brand TOP-5879F1 series smart valve positioner are used in conjunction with pneumatic control valves, and are widely used in metallurgy, power generation, paper-making, environmental protection and other industries where process control is required.

Typical valve application

Diaphragm control valve, single-acting ball valve, single-acting butterfly valve

Technical features of the product

• Nozzle baffle + symmetrical membrane valve structure, strong ability to resist dust, moisture and oil;

• Built-in keyboard and large LCD screen, the positioner can be debugged without a handheld operator;

• HART communication, modular design, convenient for users to choose and use;

• Valve position output, modular design, convenient for users to choose and use;

• Configure linear, quick opening, equal percentage and user-defined flow characteristics;

• One-key auto-tuning operation to meet the needs of users for quick installation and fool-like debugging;

• PID compound control algorithm can achieve 0.1-0.3% control accuracy.

Performance indicators

Selection guide for TOP-5879F1 C series smart valve positioner