Butterfly valve
High-Performance Butterfly Valves for Industrial Applications
A butterfly valve is a quarter-turn rotational motion valve used to regulate flow in a piping system. With their compact design and excellent sealing capabilities, butterfly valves have become essential components in various industries including oil & gas, water treatment, chemical processing, and HVAC systems.
Key Features of Our Butterfly Valves:
- Durable construction with high-grade materials
- Bubble-tight shutoff capability
- Low torque operation for smooth performance
- Compact and lightweight design
- Minimal pressure drop across the valve
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Rating | 150# to 600# (PN10 to PN100) |
| Temperature Range | -20°F to 600°F (-29°C to 315°C) |
| Body Materials | Carbon Steel, Stainless Steel, Ductile Iron, Alloy Steel |
| Seat Materials | EPDM, Buna-N, Viton, PTFE, Metal |
| Operation Types | Lever, Gear, Pneumatic, Electric, Hydraulic Actuated |
Butterfly Valve FAQs
What are the main types of butterfly valves?
There are three primary types of butterfly valves: Concentric (resilient seat), Double-offset (high-performance), and Triple-offset (metal seat). The concentric type is most common for general purposes, while double and triple offset valves are used for more demanding applications requiring higher pressure ratings and better sealing.
How do I select the right butterfly valve for my application?
Selection depends on several factors: fluid type (liquid, gas, slurry), operating pressure and temperature, flow characteristics, required shutoff class, and environmental conditions. For corrosive media, choose stainless steel or lined valves. High-temperature applications require metal-seated valves. Consult with our engineers for specific recommendations.
What maintenance is required for butterfly valves?
Butterfly valves require minimal maintenance compared to other valve types. Regular inspections should check for leaks, proper disc alignment, and actuator function. Lubricate moving parts as recommended by the manufacturer. Replace seats and seals when wear is evident. Proper installation and periodic exercise of the valve will maximize service life.
Butterfly Valve Operation and Installation Guide
Proper installation is crucial for optimal butterfly valve performance. Follow these guidelines:
- Ensure proper alignment with piping - avoid forcing misaligned flanges
- Install with sufficient clearance for operation and maintenance
- For wafer-style valves, use proper gaskets and follow torque specifications
- Support piping adequately to prevent stress on valve body
- Consider flow direction - some designs are uni-directional
Butterfly Valve Applications
| Industry | Application | Recommended Type |
|---|---|---|
| Water Treatment | Flow control in pipelines, pump stations | Resilient-seated, wafer-style |
| Oil & Gas | Crude oil pipelines, refining processes | Triple-offset, metal-seated |
| Chemical Processing | Corrosive chemical handling | PTFE-lined, stainless steel |
| HVAC | Chilled water systems, air handling | Lug-type, EPDM seats |
Advantages of Our Butterfly Valves
- Superior sealing technology reduces leakage to industry-leading levels
- Rugged construction for long service life in demanding environments
- Precision-machined components ensure smooth operation
- Compliance with major industry standards (API, AWWA, ANSI)
- Custom configurations available for special applications
Butterfly Valve Standards and Certifications
Our butterfly valves meet or exceed all major industry standards including:
- API 609 - Butterfly Valves: Double Flanged, Lug- and Wafer-Type
- AWWA C504 - Rubber-Seated Butterfly Valves
- ANSI B16.34 - Valve Flanges and Threaded End
- ISO 5752 - Face-to-face dimensions for metal valves
- ASME B16.5 - Pipe Flanges and Flanged Fittings
Troubleshooting Common Butterfly Valve Issues
| Problem | Possible Cause | Solution |
|---|---|---|
| Leakage | Damaged seat, improper installation, excessive pressure | Inspect and replace seat, check installation, verify pressure rating |
| Difficult operation | Lack of lubrication, debris accumulation, stem damage | Lubricate, clean valve, inspect stem for damage |
| Vibration/noise | High velocity flow, cavitation, loose components | Check flow velocity, ensure proper support, tighten components |