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P.C. Engineering Corporation
Spirax Sarco AEL6 Series Smart Electric Actuators for Control Valves DN15 - DN100

Overview

The Spirax Sarco AEL6 Series smart electric actuators are reversible, linear-output actuators designed for precise modulating control of 2-port and 3-port control valves in sizes DN15 to DN100. These actuators integrate seamlessly with Spirax Sarco Spira-trol, QL43, and QL73 valve ranges using appropriate mounting flanges and valve adaptors.

The AEL6 range supports multiple supply voltages (230 VAC, 115 VAC, 24 VAC, and 24 VDC) and accepts standard analog control signals (0/4–20 mA or 0/2–10 VDC). Built-in positioner functionality with adjustable dead-band, automatic commissioning, and characteristic curve correction (up to 16 interpolation points) ensures accurate valve positioning across varying process conditions.

With IP65 ingress protection, robust die-cast aluminium housing, and an operating ambient range of –20 °C to +60 °C, the AEL6 actuators are suitable for demanding industrial environments. Onboard diagnostics store cumulative operation data including motor running time, start counts, torque, and temperature—enabling predictive maintenance strategies.

Key Features

  • Reversible linear output with thrust ratings from 2.3 kN to 25 kN
  • Multi-voltage compatibility: 230 VAC, 115 VAC, 24 VAC, 24 VDC
  • Analog input signal: adjustable 0/4–20 mA or 0/2–10 VDC
  • Active valve position feedback for closed-loop control
  • Automatic commissioning with torque-dependent end-stop detection
  • Characteristic curve correction with up to 16 interpolation points
  • IP65 enclosure rating (shelter recommended for outdoor use)
  • Internal fault monitoring: torque, position, electronics temperature
  • Diagnostic storage: motor runtime, start count, torque, temperature logs
  • Optional add-ons: auxiliary position switches, local control unit, fault indicator relay

Specifications

ParameterAEL6221AEL6321AEL6323AEL6421AEL6422AEL6532AEL6631
Actuator Thrust (kN)2.34.54.5881425
Stroke (mm)50505050506595*
Actuator Speed (mm/s)0.90.94.50.71.71.30.4
Max Power Consumption (VA)13195725726588
Supply Voltage230 VAC, 115 VAC, 24 VAC, 24 VDC←←←←←←
Supply Frequency50 Hz / 60 Hz / Continuous←←←←←←
Enclosure RatingIP65←←←←←←
Ambient Temperature–20 °C to +60 °C←←←←←←
Case MaterialPolycarbonatePolycarbonatePolycarbonatePolycarbonatePolycarbonateDie-cast AluminiumDie-cast Aluminium
Housing MaterialDie-cast Aluminium←←←←←←
Spindle Nut MaterialPOM-CPOM-CPOM-CBronze & AluminiumBronze & AluminiumBronze & AluminiumBronze & Al-Zn Alloy

Applications

- HVAC heating and cooling coil control in commercial and industrial buildings - Steam and hot water temperature regulation in process plants - Flow and pressure modulation in pharmaceutical and chemical manufacturing - Mixing and diverting service with QL43/QL73 three-port valves - Boiler feedwater and condensate system control - District heating substations and heat exchangers

Frequently Asked Questions

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