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Ensuring Safety of 3-Position Pneumatic Actuators
1. Design & Selection
- Choose ATEX/IECEx-certified models for hazardous areas
- Select actuators with 30%+ higher load capacity than required
2. Installation Standards
- Use lock-secured bolts per ISO 5211 specifications
- Install quick exhaust valves to prevent unintended movement
3. Air Supply Safety
- Equip FRL units (Filter-Regulator-Lubricator) for clean, dry air (ISO 8573-1)
- Add low-pressure alarms (auto-shutdown below 4 bar)
4. Mechanical Protection
- Install hard stops to prevent over-travel
- Fit torque-limiting couplings on rotary models
5. Electrical Safety
- Use IP67-rated junction boxes for solenoids
- Ensure ground resistance <4Ω for intrinsic safety circuits
6. Maintenance Protocol
- Monthly seal wear inspections
- Quarterly emergency reset function tests
- Document pressure-position correlation curves
Special Applications
Chemical
NACE MR0175-compliant materials
Food/Medical
FDA-approved lubricants
Aerial Equipment
Dual-locking mechanisms
Key Safety Standards
- ISO 13849-1 (Safety of machinery)
- IEC 61508 (Functional safety)
- ANSI/ISA-75.19.01 (Pneumatic actuator testing)
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