Product Overview
The Spring Return Fail-safe Electric Actuator is an industrial-grade quarter-turn actuator designed for safety-critical valve automation and emergency shutdown (ESD) systems.
It features a built-in spring energy storage mechanism that automatically drives the valve to a predefined safe position (fail-open or fail-close) in the event of power failure, control signal loss, or emergency shutdown.
This type of actuator is widely used in industrial automation projects across oil & gas, offshore platforms, chemical processing plants, water treatment facilities, and power generation systems.
As a professional valve actuator manufacturer, we provide OEM and EPC project supply solutions to customers in Europe, the Middle East, Southeast Asia, and South America.
Key Features
- Fail-safe spring return automatic positioning during power or signal failure
- Emergency shutdown (ESD) compatible design
- High torque output with compact industrial structure
- Suitable for quarter-turn valves (ball / butterfly / plug valves)
- Manual override for emergency operation
- IP67 / IP68 protection optional for harsh environments
- Corrosion-resistant aluminum alloy housing
- Thermal overload protection built-in
- Designed for long-term industrial continuous operation
- Supports ON/OFF and modulating control (4–20mA / 0–10V)
Technical Specifications
| Torque Range: | 50–2000 Nm (customizable) |
| Power Supply: | AC 24V / 110V / 220V / 380V / DC optional |
| Control Signal: | ON/OFF / 4–20mA / 0–10V |
| Rotation Angle: | 90° ± 10° |
| Protection Class: | IP67 / IP68 optional |
| Ambient Temperature: | -20°C to +70°C (-40°C optional) |
| Duty Cycle: | 70% industrial duty |
| Cycle Life: | ≥100,000 operations |
| Mounting Standard: | ISO 5211 / DIN standard |
| Travel Time: | 10–60 seconds depending on torque output |
Selection Guide
To ensure correct actuator selection, please provide:
- Valve type (ball / butterfly / plug valve)
- Valve size and pressure rating
- Required torque (Nm)
- Fail-safe position (fail-open / fail-close)
- Power supply specification
- Control signal type
- Installation environment (indoor / outdoor / offshore / corrosive area)
Working Principle
During normal operation, the electric motor drives the valve while compressing the internal spring, storing mechanical energy.
When powered, the actuator precisely follows control signals for valve positioning.
In case of power failure or emergency shutdown, the stored spring energy is released, automatically driving the valve to its predefined fail-safe position.
This ensures continuous safety protection even under critical system failure conditions.
Applications
- Oil & gas pipeline emergency shutdown systems
- Offshore platform valve automation systems
- Chemical processing and dosing systems
- Water treatment and desalination plants
- Power generation safety control systems
- HVAC industrial automation systems
- Fire protection and safety systems
- Marine engineering and shipbuilding systems
Manufacturing & Quality Assurance
- ISO 9001 certified manufacturing system
- 100% functional and torque testing before shipment
- IP protection and sealing performance testing
- Batch traceability control system
- Optional third-party inspection (SGS / BV / TUV)
Our actuators are designed and manufactured for long-term industrial reliability in global automation projects.
Export & Project Experience
Our products are supplied to customers in more than 30 countries and regions, including Europe, the Middle East, Southeast Asia, and South America.
We serve OEM manufacturers, valve distributors, and EPC engineering contractors in industrial automation projects.
Installation
ISO 5211 standard mounting ensures easy integration with quarter-turn valves.
Designed for industrial environments with low maintenance requirements and periodic inspection every 6–12 months.
FAQ
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