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Electric Single-Seat Regulating Valve

Electric Single-Seat Regulating Valve

Core Structure

• Electric Actuator: Servo motor + reduction gear + position feedback, converting electrical signals into linear thrust, with manual operation.

• Valve Body Assembly:

◦ Single valve core + single valve seat (single seat structure)

◦ Valve stem, valve cover, packing seal

◦ Straight-through flow path, moderate flow resistance

Working Principle
1. Control system (DCS/PLC) outputs a 4~20mA signal.
2. The actuator receives the signal and drives the valve stem to raise and lower the valve core.
3. Changing the flow area between the valve core and the valve seat adjusts the medium flow rate.
4. Position feedback forms a closed loop, ensuring the opening degree is consistent with the signal.
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Product Description

Key Features

 

• Excellent Sealing: Single-seat seal, leakage rating up to ANSI IV/V/VI (soft seal can achieve zero leakage)

• High Adjustment Accuracy: Control accuracy ±0.5%, adjustable ratio R=50

• Good Flow Characteristics: Linear, equal percentage, quick-opening options available

• Simple Installation: No air source required, just connect to electricity and a signal line

• Compact structure, easy maintenance

 

Technical Parameters (Common)

 

• Nominal Diameter: DN15~DN200

• Pressure Rating: PN16/25/40/64, Class150/300

• Control Signal: 4~20mA DC, 0~10V DC

• Power Supply: AC220V/380V, DC24V

• Flow Characteristics: Linear, equal percentage

• Leakage Rating: IV/V/VI

 

Applications


• Chemical, petroleum, metallurgy, power, pharmaceutical, water treatment

• Steam, hot water, oil, corrosive media

• High-precision adjustment + strict sealing scenarios

• Small and medium diameter, medium and low pressure differential conditions

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• Internal components: Valve core and seat can be hardened for wear resistance and erosion resistance.

• Actuator: Commonly pneumatic diaphragm type, but electric actuators are also available.

Working Principle
Fluid flows in from the bottom, and the valve core moves up and down to change the flow area, achieving flow and pressure regulation.

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1. The ball core has a V-shaped notch, and the valve stem drives the ball to rotate 0-90°;

2. A wedge-shaped throttling channel is formed between the V-shaped notch and the valve seat. As the rotation angle changes, the flow cross-sectional area changes synchronously;

3. When paired with a pneumatic valve positioner, it receives 4-20mA analog signals to precisely control the opening degree, achieving continuous regulation of pressure, flow rate, and liquid level;

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Electric Single-Seat Regulating Valve

Electric Single-Seat Regulating Valve

Core Structure

• Electric Actuator: Servo motor + reduction gear + position feedback, converting electrical signals into linear thrust, with manual operation.

• Valve Body Assembly:

◦ Single valve core + single valve seat (single seat structure)

◦ Valve stem, valve cover, packing seal

◦ Straight-through flow path, moderate flow resistance

Working Principle
1. Control system (DCS/PLC) outputs a 4~20mA signal.
2. The actuator receives the signal and drives the valve stem to raise and lower the valve core.
3. Changing the flow area between the valve core and the valve seat adjusts the medium flow rate.
4. Position feedback forms a closed loop, ensuring the opening degree is consistent with the signal.

+86 19858780995

+86 19858780995

+86 19858780995

+86 19858780995

19858780995@163.com