381 series explosion-proof electric actuator
Structural characteristics and application scope
It is a fully electronic actuator that uses a 220V AC single-phase power supply as the driving power source and accepts 4-20mADC or 1-5VDC input signals from a computer regulator or operator to operate. The machine has a servo system and does not require additional servo amplifiers. The key component "controller" adopts a hybrid integrated circuit and is cast and cured with resin. After aging treatment, it has high reliability, moisture resistance, and shock resistance. Adjusting the zero point, stroke, and sensitivity with a potentiometer is convenient and easy to implement; Use the function switch to freely select the three states of forward, reverse action, and signal interruption. At the same time, the actuator has three protection functions: overload protection, temperature protection, and compression spring to ensure the valve is tightly closed. It is a product with high reliability that can be combined with various linear and angular stroke regulating valves to form an electric regulating valve. Therefore, it is widely applied in industrial sectors such as power generation, metallurgy, petrochemicals, light industry, and environmental protection.
Product features of 381 explosion-proof electric actuator
1. The actuator is designed with a servo system (without the need for an additional servo amplifier), which only requires the connection of a DC4-20mA (or DC1-5V) signal and an AC220V single-phase power supply to operate. Equipped with internal wiring terminals, the wiring is extremely simple and convenient.
2. The key component of the actuator - the controller, uses a hybrid integrated circuit sealed and cast with resin, with a box shaped appearance, small volume, and high reliability.
3. The feedback detection of the driving quantity adopts high-performance conductive plastic potentiometers with a resolution of less than 0.4%.
4. Equipped with self diagnostic function, when a fault occurs, the indicator light on the controller will immediately emit an indication signal.
5. The state selection switch can be used to set the cut-off signal when the valve core is in the fully open, fully closed, or self-locking state.
6. The state selection switch can be used to set (forward and reverse actions).
7. The state selection switch can be used to set the input signal to (DC4-20mA or DC1-5V).
8. Adjusting the work zero point (starting point) and travel (ending point) is simple and easy.
9. When there is a sudden power outage, it can ensure that the valve core is self-locking.
10. Adopting synchronous belt transmission effectively reduces noise.
11. Delay protection function, can implement state self-locking when rated load, can immediately start protection when a fault occurs, and can reverse operation to cancel delay protection.
Main technical parameters of 381 series explosion-proof electric actuator
Power supply voltage AC220 ± 50%, 50Hz.
Power consumption specifications: A-type actuator 50VA, B-type actuator 150VA, C-type actuator 220VA
Input signal DC 4-20mA or DC 1-5V
Output signal DC 4-20mA (load resistance below 500 Ω)
Basic error of control accuracy: ± 1%, hysteresis ≤ 1%, dead zone ≤ 1%
Stroke
Adjustment range: "Zero point" ± 25%, "Travel" 20%~100%

The performance of the 381 explosion-proof valve electric actuator meets the requirements of JB/T8528-1997 "Technical Conditions for Electric Devices of Ordinary Valves". The performance of the explosion-proof type complies with the provisions of GB3836.1-2000 "Electrical Equipment for Explosive Gas Environments Part 1: General Requirements", GB3836.2-2000 "Electrical Equipment for Explosive Gas Environments Part 2: Explosion proof Type" d "", and JB/T8529-1997 "Technical Conditions for Explosion proof Valve Electric Devices".
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