01
Precision Modulating Control
Reference basic error, hysteresis and dead zone are each controlled within the specified catalog limits for repeatable valve positioning.
Industrial Linear Motion Control
Linear Electric Actuator Control Valve
A linear electric actuator control valve package designed for accurate valve-stem positioning, dependable modulating service and automated process control in HVAC, water treatment, power, chemical and general industrial systems.
Related solutions: Linear Electric Actuator, Electric Linear Actuator Control Valve, Modulating Control Valve, Electric Actuated Globe Valve, Linear Valve Actuator and 381LS Electric Actuator.
800–26,000 N
Available thrust range
30 / 60 / 100 mm
Maximum stroke options
4–20 mA or 1–5 V
Input signal options
±1% Accuracy
Reference control accuracy
Product Overview
Accurate Linear Positioning for Automated Control Valves
The 381LS series linear electric actuator converts an electrical command signal into controlled linear stem travel. It can be combined with globe valves and other compatible regulating valves through a selected mounting bracket and stem connection.
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01Closed-loop modulating control: accepts standard process signals and provides position feedback for automation systems.
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02Wide thrust coverage: models range from 800 N to 26,000 N for different valve sizes and shutoff loads.
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03Flexible stroke adjustment: zero point and operating stroke can be adjusted to match the connected valve.
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04Valve package compatibility: multiple bracket codes support a range of common control-valve diameters.
Product Advantages
Why Choose a Linear Electric Actuator Control Valve
The actuator package is configured around required thrust, speed, stroke, valve size, control signal and installation environment.
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Multiple Thrust and Stroke Options
Eight catalog models cover 800 N to 26,000 N with 30 mm, 60 mm or 100 mm maximum travel options.
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Standard Automation Signals
Supports DC 4–20 mA or DC 1–5 V command signals and DC 4–20 mA output feedback.
04
Broad Power-Supply Compatibility
AC and DC power options are available for different regions, control panels and industrial electrical standards.
05
Configurable Mounting Brackets
Bracket codes A-2 through C-6 support multiple valve diameter ranges and stem-thread arrangements.
Main Technical Parameters
Electrical, Signal and Control Specifications
The following values are translated from the supplied actuator manual and should be confirmed for the final ordered model.
01
Power Supply and Consumption
- Single-Phase AC
- AC 110 V 50/60 Hz; AC 220 V 50/60 Hz; AC 240 V 60 Hz
- Three-Phase AC
- AC 380 V 50 Hz
- DC Supply
- DC 24 V, DC 36 V, DC 48 V
- Type A Consumption
- 50 VA at rated load
- Type B Consumption
- 150 VA at rated load
- Type C Consumption
- 220 VA at rated load
02
Signals, Accuracy and Stroke
- Input Signal
- DC 4–20 mA or DC 1–5 V
- Output Signal
- DC 4–20 mA, load resistance ≤ 500 Ω
- Basic Error
- ±1%
- Hysteresis
- ≤ 1%
- Dead Zone
- ≤ 1%
- Zero Adjustment
- ±25%
- Stroke Adjustment
- 20%–100%
Power-supply notes:
Type C models have higher power consumption and are not offered with nominal
DC 24 V, DC 36 V or DC 48 V supply. Supply-voltage deviation should remain
within ±10%. Specify rated voltage and frequency when ordering.
External Wiring
Recommended Cable Arrangement
Use shielded cable for input and output signals. Do not route the power conductors and signal conductors in the same cable.
| Item | Standard S-Type Actuator |
|---|---|
| Power Cable | 3-core, 1.5 mm² |
| Signal Cable | 4-core, 1.5 mm² |
| Cable Entry | 2 × M20 × 1.5 |
Environmental Conditions
Reference Operating Environment
Confirm enclosure, heater and site conditions before selecting the actuator package.
| Condition | Standard S-Type Actuator |
|---|---|
| Temperature, No Heater | -10°C to 60°C |
| Temperature, With Heater | -35°C to 60°C |
| Relative Humidity | ≤ 95% |
| Ambient Gas | Non-corrosive gas |
| Mechanical Vibration | ≤ 1.5 g |
Series Selection
381LS Linear Electric Actuator Model Range
Select the actuator according to required thrust, operating speed, valve travel and shutoff force.
| Model | Output Thrust (N) | Operating Speed (mm/s) | Maximum Stroke (mm) |
|---|---|---|---|
| 381LSA-08 | 800 | 4.2 | 30 |
| 381LSA-20 | 2,000 | 2.1 | 30 |
| 381LSB-30 | 3,000 | 3.5 | 60 |
| 381LSB-50 | 5,000 | 1.7 | 60 |
| 381LSC-65 | 6,500 | 2.8 | 100 |
| 381LSC-99 | 10,000 | 2.0 | 100 |
| 381LSC-160 | 16,000 | 1.0 | 100 |
| 381LSC-260 | 26,000 | 1.0 | 100 |
Verify that actuator thrust is sufficient for valve shutoff differential pressure, packing friction and required safety margin.
Actuator Drawings
381LSA / 381LSB and 381LSC Outline Views
Two drawing panels are retained to separate the A/B actuator body from the larger C-series configuration. Replace the URLs with final English engineering drawings.
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381LSA / 381LSB Outline Drawing
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381LSC Outline Drawing
Overall Dimensions
381LS Actuator Dimension Reference
Dimension symbols correspond to the actuator outline drawings. Values are in millimetres unless otherwise stated.
| Model | D1 | D2 | H1 | h1 | h2 | d1 | d2 | d3 | C | K | M | W | Y | O | F | R | X | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 381LSA | Ø225 | Ø260 | 200 | 78 | 18 | Ø90 | Ø70 | Ø55 | M14 × 1.5 | 15 | M8 | 28 | 87 | 10 | 12 | 80 | 75 | 12 |
| 381LSB | Ø255 | Ø290 | 280 | 125 | 31 | Ø125 | Ø102 | Ø70 | M18 × 1.5 | 18 | M10 | 45 | 90 | 10 | 15 | 100 | 91 | 22 |
| 381LSC | Ø310 | Ø360 | 415 | 175 | 31 | Ø150 | Ø125 | Ø85 | M22 × 1.5 | 24 | M12 | — | 90 | 10 | 15 | 160 | 120 | 55 |
Dimension W is not specified for the 381LSC row in the supplied catalog image. Confirm the final approved production drawing before manufacturing the mounting structure.
Mounting Brackets
Actuator-to-Control-Valve Bracket Selection
Each actuator model may be paired with two or three bracket sizes according to the connected control-valve diameter. Always verify actuator thrust against valve opening and closing force.
Model and Valve Diameter Compatibility
| Actuator Model | Control Valve Diameter (DN) | Bracket Code |
|---|---|---|
| 381LSA-08 | 20 | A-2 |
| 381LSA-20 | 20–50 | A-2 |
| 381LSB-30 | 25–50 | B-3 |
| 381LSB-30 | 65–100 | B-4 |
| 381LSB-50 | 25–50 | B-3 |
| 381LSB-50 | 65–100 | B-4 |
| 381LSB-50 | 125–150 | B-5 |
| 381LSC-65 | 65–100 | C-4 |
| 381LSC-65 | 125–200 | C-5 |
| 381LSC-99 | 125–200 | C-5 |
| 381LSC-99 | 250–300 | C-6 |
| 381LSC-160 | 125–200 | C-5 |
| 381LSC-260 | 125–200 | C-5 |
| 381LSC-400 | 250–300 | C-6 |
Bracket Connection Dimensions
| Bracket Code | L | L1 | D | n-d1 | D2 | H | D3 | L2 |
|---|---|---|---|---|---|---|---|---|
| A-2 | 173 | 78 | Ø80 | 4-Ø10 | Ø60 | 130 | 100 | 17 |
| B-3 | 215 | 125 | Ø80 | 4-Ø10 | Ø60 | 157 | 125 | 21 |
| B-4 | 255 | 125 | Ø105 | 4-Ø12 | Ø80 | 175 | 135 | 21 |
| B-5 | 267 | 125 | Ø118 | 4-Ø14 | Ø95 | 177 | 155 | 25 |
| C-4 | 285 | 175 | Ø105 | 4-Ø12 | Ø80 | 205 | 155 | 27 |
| C-5 | 310 | 175 | Ø118 | 4-Ø14 | Ø95 | 210 | 155 | 27 |
| C-6 | 345 | 175 | Ø130 | 4-Ø18 | Ø100 | 220 | 175 | 27 |
Reference Control-Valve Stem Connection
| Control Valve Diameter (DN) | Reference L | Valve Stem Thread |
|---|---|---|
| 20, 25, 32, 40, 50 | 95 | M8 |
| 65, 80, 100 | 135 | M12 × 1.25 |
| 125, 150, 200 | 140 | M16 × 1.5 |
| 250, 300 | 170 | M20 × 1.5 |
Typical Applications
Industrial Applications for Linear Actuator Control Valves
The package is suitable for automated flow, pressure, temperature and level control where controlled linear valve travel is required.
HVAC and Building Automation
Hot-water, chilled-water and thermal-energy control loops.
Water Treatment
Flow, pressure and level regulation in treatment and distribution systems.
Power and Energy
Steam, condensate, cooling and auxiliary process regulation.
Chemical Processing
Compatible process-media control with suitable valve body and trim materials.
Industrial Utilities
Plant air, water, heat-transfer and general utility systems.
Automated Equipment Skids
PLC-controlled packages requiring repeatable linear valve positioning.
Selection Guide
How to Configure the Correct Linear Actuator Package
Match actuator thrust, travel and speed to the connected valve and process-control requirements.
Required Thrust and Safety Margin
Confirm differential pressure, valve unbalance force, packing friction and shutoff requirement.
30 mm, 60 mm or 100 mm Stroke
Match maximum actuator travel to the connected valve stem movement and adjustment range.
Input Signal and Position Feedback
Confirm DC 4–20 mA or DC 1–5 V command signal and required output feedback.
Voltage, Frequency and Consumption
Select the correct AC or DC supply and confirm the power requirements of actuator type A, B or C.
Bracket and Stem Connection
Confirm actuator model, valve diameter, bracket code, stem thread and installation dimensions.
Ordering Information
Details Required for Actuator and Valve Selection
Complete operating and mechanical data helps determine the correct actuator, bracket, stem connector and control package.
Control valve type and nominal diameter
State the valve style, DN size, pressure class and connection standard.
Required thrust and valve travel
Provide calculated operating force, shutoff force and full stem stroke.
Power supply and signal
Confirm voltage, frequency, input command and position-feedback requirements.
Bracket and stem connection
Provide valve top dimensions, stem thread and preferred mounting arrangement.
Installation environment
State temperature, humidity, vibration and any heater or enclosure requirements.
Configure Your Linear Electric Actuator Control Valve
Send the valve size, required thrust, stroke, supply voltage, control signal, mounting dimensions and operating conditions for a suitable quotation and drawing.