1. Functional Comparison
| Type | Electric Butterfly Valve | Manual Butterfly Valve |
|---|---|---|
| Drive Mechanism | Electric actuator (motor-driven) | Handwheel/lever operation |
| Environment | Unsuitable for humid conditions | Adaptable to most environments |
| Applications | Large-diameter pipelines, corrosive/abrasive media | General industrial use (oil, gas, water, etc.) |
| Control | Remote/automated operation with higher torque | Quick 90° rotation for on/off control |
2. Installation Requirements
Electric Butterfly Valve
Pipe Support: Requires reinforced flange connections and pipeline supports to avoid radial stress
Alignment: Flow direction must match valve body arrow marking
Accessibility: Install at ergonomic height (1.2–1.5m) for maintenance access
Accessories: Large-diameter valves need bellows compensators on one end
Manual Butterfly Valve
Orientation: No flow direction restriction (except for companion expansion joints)
Positioning: Handwheel at chest height (~1.2m) for optimal leverage
Pre-Installation:
Clean valve/pipeline interiors thoroughly (zero particulate tolerance)
Verify material compatibility with process media
Mounting:
Wafer-type: Install between flanges with uniform bolt torque
Lug-type: Direct flange bolting permitted
3. Technical Notes
Common Features:
90° disc rotation (0°=closed, 90°=full open)
Compact design with low pressure drop
Industry Standards:
API 609 (fire-safe design)
ISO 5752 (face-to-face dimensions)
