Our 12" butterfly valve (DN300) delivers enterprise-level performance for demanding industrial applications. Featuring a double eccentric + oblique seal design, this lug type valve reduces opening and closing torque by 30% while extending operational life to over 50,000 cycles. Built with DI/QT450 body material and supporting PN10/PN16 working pressures, it handles temperatures from 0℃ to 80℃. The ISO5211 connection standard ensures compatibility with various automation systems, making it your reliable choice for petrochemical, power generation, and water treatment facilities.
You'll appreciate the advanced engineering behind our large diameter butterfly valve. The one-piece design minimizes seat wear during operation. This means longer service life and reduced maintenance costs for your facility.
The oblique seal configuration creates a tight seal even under high pressure conditions. Your system maintains optimal performance without unwanted leakage. The gearbox operation provides smooth, controlled movement that handles frequent cycling without premature failure.
Our lug type connection offers installation flexibility. You can remove downstream piping without affecting the valve installation. This saves valuable maintenance time and reduces system downtime.

| Parameter | Specification |
|---|---|
| Size | 12" (DN300 mm) |
| Working Pressure | PN10/PN16 |
| Connection Type | Lug type |
| Connection Standard | ISO5211 (PN10/PN16/125LB/150LB/JIS10K/JIS16K) |
| Operation Method | Gearbox |
| Body Material | DI/QT450 |
| Disc Material | DI/CF8/CF8M/Aluminum bronze |
| Seat Material | EPDM/NBR/PTFE/VITON |
| Suitable Medium | Water, gas, oil, chemical liquids |
| Operating Temperature | 0℃ to 80℃ |
Your application demands materials that withstand harsh operating conditions. Our valve body uses ductile iron (DI/QT450) for exceptional strength and durability. The disc options include stainless steel grades CF8 and CF8M for corrosion resistance in aggressive media.
You can choose from multiple seat materials to match your specific application. EPDM works excellently with water systems. NBR handles oil-based fluids effectively. PTFE provides chemical compatibility across a wide range of media. VITON offers superior temperature resistance for demanding applications.
The aluminum bronze disc option delivers outstanding performance in seawater and marine environments. Your coastal or offshore installation benefits from this corrosion-resistant material selection.
Modern industrial processes require automation capabilities. Our 12" butterfly valve includes reserved interfaces for electric and pneumatic actuators. You can upgrade to automated control without replacing the valve body.
The ISO5211 mounting pattern accepts standard actuators from major manufacturers. This compatibility gives you flexibility in choosing automation components that fit your budget and performance requirements.
Electric actuators provide precise positioning control. You receive accurate flow regulation with 4-20mA control signals. Pneumatic options offer fast response times for emergency shutdown applications.
ZTVK maintains ISO9001 quality management certification. Our manufacturing facility in Tianjin features modern CNC machining centers and specialized large-diameter valve processing equipment. Every valve undergoes rigorous pressure testing before shipment.
We follow multiple international standards including API, ANSI, JIS, BS, and DIN. Your project specifications align with our manufacturing capabilities regardless of your preferred standard.
Chemical analysis and material inspection ensure consistent quality. Our quality control process includes dimensional verification and performance testing. You receive documentation proving compliance with your specifications.

Our strategic location 50km from Tianjin Port enables efficient international shipping. Standard size valves ship within 3-7 days from our 2000+ unit inventory. Custom configurations complete production within 15-25 days.
Professional packaging meets ISPM 15 international standards. Wooden crates with moisture-proof film and fixing brackets protect your valve during transit. This prevents customs delays and ensures arrival in perfect condition.
We provide comprehensive technical support including CAD drawings, 3D models, and installation guidance videos. Our 18-month warranty covers manufacturing defects with free replacement for non-human damage.

The large bore design handles high-volume applications effectively. Water treatment plants benefit from reliable flow control and minimal pressure drop. Power generation facilities appreciate the robust construction and extended service life.
Chemical processing operations rely on our material compatibility and tight shutoff capability. Oil and gas applications value the fire-safe design and emission control features.
Your maintenance team will appreciate the simple design and easy access to internal components. Routine maintenance requires minimal downtime and standard tools.

Choosing our valve provides long-term value for your operation. The extended 50,000-cycle lifespan reduces replacement frequency. Lower operating torque decreases actuator power requirements and energy costs.
Reduced maintenance needs minimize labor costs and system interruptions. The modular design allows component replacement without complete valve replacement. This approach maximizes your capital equipment investment.
Our local technical service partners provide on-site support when needed. Digital service records accessible via QR codes simplify maintenance tracking and regulatory compliance.

Ready to upgrade your flow control system? Contact our technical team at ktec86961886@163.com for personalized 12“ butterfly valve selection assistance.
Send us your valve requirements and our team will provide professional solutions and fast quotations.