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Help CenterDN 800 Cast Iron Ductile Iron Double Flange Butterfly Valve PN 10 PN16 Low Pressure Butterfly Valve for Municipal Sewage Worm Gear Operated
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1. Product Overview
This worm gear double flange butterfly valve is a high-performance industrial valve designed for water supply, sewage treatment, HVAC, and general industrial pipeline systems. Made of high-quality ductile iron (FCD400) with EPDM soft seal, it features reliable sealing, easy operation, and long service life, meeting the requirements of GB 5135.6, AWWA C606 and other international standards. It is an ideal choice for municipal engineering, water plants, and industrial pipeline projects.
2. Product Features
✅ Durable Ductile Iron BodyIntegral cast ductile iron body with high strength, impact resistance and corrosion resistance, far superior to ordinary cast iron, suitable for long-term use in harsh water and sewage environments.
✅ Excellent EPDM Soft SealEPDM seat ensures zero leakage, excellent aging resistance, ozone resistance and chemical corrosion resistance, suitable for water, sewage, weak acid and other media, with a service life of more than 5 years.
✅ Worm Gear OperationManual worm gear drive with labor-saving operation, precise flow control and stable structure, suitable for large-diameter valves, easy to install and maintain, no need for power supply.
✅ Center Sealing StructureCenter-sealed design with small flow resistance, fast opening and closing, no medium retention, effectively preventing clogging, suitable for clean water and sewage media.
✅ Wide Application RangeSuitable for normal temperature (-40℃~120℃) and low pressure (≤1.6MPa) systems, covering DN50-DN200 (NPS 2"-8") full specifications, meeting the needs of different pipeline projects.
3. Technical Specifications
| Item | Parameter |
|---|---|
| Valve Type | Double Flange Soft Sealed Butterfly Valve |
| Drive Mode | Worm Gear (Handwheel Operated) |
| Body Material | Ductile Iron (FCD400 / QT400-18) |
| Disc Material | Ductile Iron / SS304 (Optional) |
| Seat Material | EPDM (NBR / Viton Optional) |
| Stem Material | Stainless Steel |
| Connection Type | Double Flange |
| Sealing Type | Soft Sealed, Center Sealing |
| Pressure Rating | PN10 / PN16 (Class150 Optional) |
| Temperature Range | -23℃ ~ 121℃ |
| Applicable Medium | Water, Sewage, Air, Weak Acid |
| Standard | GB 5135.6, AWWA C606, EN593 |
| Size Range | DN50-DN800 (NPS 2"-32") (DN50-DN1200 Customizable) |
4. Application Scenarios
🏗️ Municipal Engineering: Municipal water supply, drainage, sewage treatment plants
🏭 Industrial Use: Industrial water circulation, HVAC systems, chemical pipelines
🚰 Water Conservancy: Water plants, pump stations, reservoir pipelines
🏢 Building Services: High-rise building water supply, fire protection systems
✅ International Quality CertificationOur company is certified by ISO 9001 Quality Management System, ensuring strict quality control throughout the production process, and delivering reliable valve products to global customers.
5.Packaging and Transportation
Packaging：Standard export plywood case / carton, with foam protection to avoid damage during transportation
Delivery Time：3-7 working days for stock, 15-20 working days for customized orders
Shipping Method：Sea freight, air freight, express (DHL, FedEx, etc.)
Customization Support：Accept customized size, pressure, material, logo, etc.
Q&A for Worm Gear Double Flange Soft Sealed Butterfly Valve
Q1: What is the material of the valve body and seal?
A: The valve body is made of high-quality ductile iron (FCD400/QT400-18) with integral casting, featuring high strength and impact resistance. The standard seal is EPDM, which has excellent aging resistance and corrosion resistance, suitable for water and sewage media. We also offer optional NBR/Viton seals for special media.
Q2:Why Choose Us
Established in 1993, our factory covers more than 70,000 square meters with over 400 employees. We offer 30 major series and over 2,000 specifications, including gate valves, globe valves, check valves, ball valves, strainers, butterfly valves and balancing valves. As a National Specialized, Sophisticated, Unique and New "Little Giant" Enterprise in Hebei Province, we are highly recognized by the state.
Our products comply with BS, DIN, EN, ANSI, JIS and other international standards, and are exported to more than 30 countries and regions in the Middle East, Europe, America and Africa. "Integrity" is the core of our corporate culture, and our trademark CHX has become a reliable symbol of valve quality and professional service.
Q3: What sizes are available? Can you customize large sizes?
A: Our standard stock sizes are DN50-DN800 (NPS 2"-32"). We also support customized production of large sizes up to DN1200 (NPS 48"), including DN800 (NPS 32") and other large-diameter butterfly valves for municipal engineering.
Q4: What standards do your products comply with?
A: Our products strictly comply with Chinese national standard GB 5135.6, American AWWA C606, European EN593 and other international standards, and pass 100% pressure test before delivery to ensure product quality.
Q5: What is the lead time and packaging method?
A: The lead time for standard sizes is 7-15 working days after order confirmation. Large sizes and customized products will be confirmed separately. The packaging is standard plywood case/carton, which is shockproof and moisture-proof, suitable for sea/air transportation.
Q6: Can you provide OEM/ODM service?
A: Yes, we support OEM service, including custom brand (CHX or your private label), custom material, pressure rating, connection type and other special requirements to meet your project needs.
Q7: What is the warranty policy?
A: We provide a 12-month warranty for all products. If there is any quality problem within the warranty period, we will provide free replacement parts or maintenance services, and support lifelong technical support.
Q8: What trade terms do you accept?
A: We accept EXW, FOB, CIF, DDP and other common international trade terms, and can arrange shipping according to your requirements.
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