Butterfly Valve Connection Types And Selection Guide for Industrial Systems
Publish Time: 2026-03-27 Origin: Site
Introduction
In industrial piping systems, butterfly valves are widely used due to their simple structure, fast operation, and excellent flow capacity. With just a 90-degree rotation, they can efficiently control or shut off fluid flow, making them a preferred choice across industries such as water treatment, chemical processing, and power generation.
However, one critical factor is often overlooked: the butterfly valve connection type.
The connection method directly affects compatibility with pipelines, installation efficiency, sealing reliability, and maintenance cost. Choosing the right connection type is essential for ensuring long-term system performance.
Why Butterfly Valve Connection Type Matters
Different connection types are designed for different operating conditions. A mismatch can lead to leakage risks, installation difficulties, increased downtime, and higher lifecycle costs.
Understanding each connection type helps engineers and buyers make informed decisions based on pressure, temperature, pipeline size, and maintenance needs.
Wafer Type Butterfly Valve
Structure and Design
The wafer butterfly valve is installed between two pipe flanges and secured using long bolts that pass through the entire assembly.
Key Advantages
Compact and lightweight
Cost-effective
Quick installation
Limitations
Suitable for low-pressure systems (≤1.6 MPa)
Not ideal for large diameters
Best Applications
DN50–DN600 pipelines
Low-pressure systems
Space-limited installations
Flanged Butterfly Valve
Structure and Design
Flanged butterfly valves have integrated flanges on both ends, allowing direct connection to pipe flanges.
Key Advantages
Strong compatibility
Easy maintenance
Reliable sealing
Limitations
Requires more space
Higher cost
Best Applications
General industrial systems
Large pipelines
Systems requiring maintenance
Lug Type Butterfly Valve
Structure and Design
Lug type butterfly valves feature threaded inserts that allow direct bolting to the pipeline.
Key Advantages
Precise installation
Strong structural support
Handles vibration well
Limitations
Requires stable installation base
More complex installation
Best Applications
DN300+ pipelines
Municipal systems
Power plants
Grooved (Clamp) Butterfly Valve
Structure and Design
Grooved butterfly valves use clamps and bolts for quick connection.
Key Advantages
Fast installation
Easy maintenance
No pipe damage during removal
Limitations
Pressure limit ≤2.5 MPa
Temperature limit ≤120°C
Best Applications
Water systems
Low-pressure pipelines
Frequent maintenance scenarios
Welded Butterfly Valve
Structure and Design
Welded butterfly valves are directly welded into the pipeline, forming a permanent connection.
Key Advantages
Zero leakage
High strength
Suitable for hazardous media
Limitations
Not removable
High maintenance cost
Requires professional installation
Best Applications
High-temperature systems
Oil & gas pipelines
Chemical industry
Nuclear applications
Comparison of Butterfly Valve Connection Types
| Type | Pressure | Installation | Maintenance | Best Use |
|---|---|---|---|---|
| Wafer | Low | Easy | Medium | Compact systems |
| Flanged | Medium | Moderate | Easy | General industry |
| Lug | Medium-High | Complex | Medium | Large pipelines |
| Grooved | Low | Very fast | Easy | Water systems |
| Welded | High | Difficult | Hard | Hazardous systems |
How to Choose the Right Butterfly Valve Connection
Step 1: Evaluate Working Conditions
High temperature or hazardous media → Welded
Large flow and vibration → Lug type
Step 2: Check Pipeline Parameters
DN300+ → Lug
DN50–600 → Wafer / Flanged / Grooved
Step 3: Consider Budget and Maintenance
Low cost → Wafer
Easy maintenance → Grooved / Flanged
Long-term reliability → Welded
Common Mistakes in Selection
Choosing based only on price
Ignoring pressure and temperature limits
Mismatch between valve and pipeline
Conclusion
There is no “best” butterfly valve connection type—only the one that best fits your application.
Selecting the right connection ensures better performance, lower maintenance, and longer service life.
Get Expert Support
Not sure which butterfly valve connection is right for your system?
Contact our team for a customized solution based on your pipeline conditions.