Wear-resistant butterfly valves are increasingly applied in low-pressure, ambient-temperature environments, particularly in water treatment and environmental protection industries. Below are key precautions for installation, operation, and maintenance:
Pre-Installation Inspection:
Examine valve cavities and sealing surfaces to ensure no contaminants/grit remain, preventing seal damage.
Installation State Requirement:
Install only when the valve is fully closed.
Bolt Tightness Verification:
Check all connection bolts; tighten any loose fasteners immediately.
Packing Adjustment:
Compress packing sufficiently to ensure leak-tightness while maintaining stem rotation flexibility.
Frequent-Use Maintenance:
For valves cycled often, inspect gearbox grease every two months, maintaining adequate lubrication.
Orientation Rules:
Optimal: Vertical installation.
Permitted: Horizontal side-mounting.
Prohibited: Inverted installation (valve body higher than actuator).
Post-Factory Debugging:
Manually open to 50% position before initial power-on to verify position indicator accuracy.
Storage Conditions:
Keep valves dry; outdoor storage is strictly prohibited.
Pipeline Preparation:
Confirm pipes are free of welding slag/foreign matter before installation.
Torque Compatibility:
Manual operation resistance must be moderate; actuator torque must match valve torque ratings.
Flange Standards:
Use correct flange specifications matching valve standards. Wafer-style flanges are mandatory-no slip-on flanges permitted.
Welding Safety:
Complete all flange welding before valve installation to avoid rubber seal thermal damage.
Alignment Protocol:
Align pipeline flanges with installed valve centerlines.
Bolt Tightening Sequence:
Hand-tighten all flange bolts, verify valve alignment, then test smooth opening/closing.
Final Assembly:
Fully open valve, then diagonally tighten bolts with wrenches (no gaskets). Avoid over-tightening to prevent seat deformation or excessive torque.
