Butterfly Valves â API 609, ISO, CE Certified
Zhongvalve Manufacturing Excellence
Zhongvalve is a China-based industrial valve manufacturer with over 15 years of expertise, specializing in high-performance butterfly valves for global industries. Our API 609 certified butterfly valves deliver reliable flow control for critical applications worldwide.
Certifications & Quality Assurance
Professional Technical Overview
What is a Butterfly Valve?
A butterfly valve is a quarter-turn rotary motion valve that regulates flow using a disk mounted on a shaft, designed for quick shut-off, throttling, and isolation in industrial pipelines. The disc rotates 90 degrees to fully open or close the valve, providing excellent flow control characteristics.
Body ⢠Disc ⢠Seat ⢠Stem ⢠Actuator
Compact Design
Lightweight construction with minimal face-to-face dimensions
Bi-directional Sealing
API 609 compliant sealing in both flow directions
Multiple Body Styles
Available in wafer, lug, and flanged configurations
Wide Operating Range
Pressure (PN10âPN100) and temperature (â20°C to +450°C)
Valve Types and Configurations
| Type | Body Styles | Seat/Seal | Application | Size Range | Pressure |
|---|---|---|---|---|---|
| Concentric (Resilient) | Wafer, Lug, Flanged | EPDM/PTFE/NBR | General water, HVAC, low-pressure | DN50âDN600 | PN10âPN16 |
| Double Eccentric | Wafer, Flanged | Soft/Metal | Power, chemical, water treatment | DN80âDN600 | PN10âPN40 |
| Triple Eccentric | Wafer, Flanged | Metal | Oil & gas, steam, high temp/pressure | DN100âDN600 | PN16âPN100 |
| Metal Seated | Flanged | SS/Stellite | High temp, abrasive, critical service | DN50âDN600 | PN16âPN100 |
Concentric Design
The disc is centered on the valve seat with uniform compression. Ideal for low-pressure applications with excellent shut-off capabilities.
Double Eccentric
The disc is offset from the centerline in two directions, reducing friction and wear. Perfect for medium-pressure and temperature applications.
Triple Eccentric
Additional offset creates a cam-action sealing mechanism. Designed for high-pressure, high-temperature critical applications.
Metal Seated
All-metal construction for extreme conditions. Suitable for abrasive media and high-temperature steam service.
Product Technical Specifications
Performance Parameters
Material Options
Body Materials
WCB, CF8/CF8M, Ductile Iron, Alloy 20
Disc Materials
SS304, SS316, Duplex, Aluminum Bronze
Seat Materials
EPDM, NBR, PTFE, Metal (Stellite)
Shaft Materials
SS410, SS420, 17-4PH, Monel
Manual
Lever/Gear operated for basic control applications
Pneumatic
Air-operated for automated control systems
Electric
Motor-operated for precise positioning
Hydraulic
High-force applications and emergency shutdown
Engineering Drawings & Downloads
2D/3D General Arrangement
Complete technical drawings with dimensions and connection details
Download PDFTechnical Datasheet
Comprehensive specifications, performance curves, and material lists
Download PDFInstallation & Maintenance Manual
Step-by-step IOM procedures and troubleshooting guide
Download PDFApplication & Industry Solutions
Oil & Gas
API 6D/ISO 14313 certified valves for upstream, midstream, and downstream applications including refineries and pipelines.
Power Generation
High-temperature steam service valves for thermal power plants, nuclear facilities, and renewable energy systems.
Chemical & Petrochemical
Corrosion-resistant valves for aggressive media handling in process industries and chemical manufacturing.
Water Treatment
Municipal and industrial water systems, wastewater treatment, and potable water distribution networks.
HVAC & Building Services
Commercial and industrial HVAC systems, fire protection, and building automation applications.
Marine & Offshore
Marine-grade valves for shipbuilding, offshore platforms, and subsea applications with enhanced corrosion protection.
Application Matrix - Valve Type Selection Guide
| Application | Concentric | Double Eccentric | Triple Eccentric | Metal Seated |
|---|---|---|---|---|
| Water Service | â | â | - | - |
| Chemical Process | â | â | â | - |
| High Pressure Steam | - | â | â | â |
| Oil & Gas | - | â | â | â |
| Abrasive Media | - | - | â | â |
â Optimal Choice â Suitable - Not Recommended
Zhongvalve Manufacturing Strength
Manufacturing Capabilities
Quality Assurance
Value Proposition
Direct factory pricing with no intermediary markup, comprehensive global logistics support, and dedicated English-speaking engineering team. We deliver competitive Chinese manufacturing combined with international quality standards and professional service.
Quality Control & Inspection Process
100% Pressure/Leak Testing
Every valve undergoes complete hydrostatic and pneumatic testing per API 598 and ISO 5208 standards before shipment.
Material Certification
Full material traceability with EN10204 3.1 certificates provided for all metallic components and critical parts.
Third-Party Inspection
Optional independent inspection by SGS, Bureau Veritas, TUV, or Lloyd's Register prior to shipment at customer request.
Pre-Shipment Reports
Comprehensive quality documentation package including test results, dimensional reports, and photographic evidence.
Comparison & Selection Guidance
| Feature | Butterfly Valve | Ball Valve | Gate Valve |
|---|---|---|---|
| Cost | Excellent | Good | Fair |
| Flow Control | Excellent | Fair (On/Off) | Fair |
| Pressure Drop | Good | Excellent | Excellent |
| Space Requirements | Minimal | Compact | Large |
| Maintenance | Good | Good | Fair |
| High Temperature | Excellent* | Good | Excellent |
* Triple eccentric butterfly valves with metal seats
When to Choose Concentric Butterfly Valves
Double/Triple Eccentric Selection
Material Selection Guidelines
FAQ â Technical & Procurement
Request for Quotation
Get professional valve solutions from our experienced engineering team. We provide comprehensive technical support and competitive pricing for all butterfly valve requirements.
export@zhongvalve.com
+86-XXX-XXXX-XXXX
Wenzhou Industrial Zone, China
North America, Europe, Asia-Pacific
Professional RFQ Form
About Zhongvalve
Corporate Profile & Global Expertise
Zhongvalve, established in Wenzhou, China, is a specialized industrial valve manufacturer focused on global B2B supply, providing certified quality and engineering support for complex applications across diverse industries worldwide.