CE Certification Flanged Butterfly Valve with Lever Actuator - Durable & Reliable Manufacturers, Factory
Product Description
Product Performance Specification
Compared with wafer or lug-type designs, the double flanged butterfly valve stands out for its structural integrity and operational reliability. Its core advantages include:
1. Superior Structural Stability
The dual-flange design distributes pipeline stress evenly, resisting thrust loads, bending moments, and vibration. This makes it ideal for large-diameter pipelines and long-distance transmission lines where pipe movement or settling is a concern.
2. Precise Alignment & Easy Installation
Both flanges are machined as part of the valve body, ensuring perfect alignment with pipeline flanges. This reduces assembly time and minimizes the risk of misalignment-related leaks—especially valuable in field installations.
3. Excellent Pressure Containment
Double flanged valves typically handle higher pressure ratings (e.g., PN10–PN40 / Class 150–300) than wafer or lug equivalents. They are well-suited for high-pressure water, steam, and industrial fluid systems.
4. Bi-Directional Sealing Capability
Most designs provide bubble-tight shutoff in both flow directions, eliminating the need to orient the valve according to flow direction—simplifying engineering and procurement.
5. Simplified Maintenance & Isolation
Because the valve is bolted independently on both sides, it can be isolated and serviced without dismantling adjacent piping. This is critical in continuous-process plants such as water treatment, power generation, and chemical processing.
6. Compatibility with Actuation
The robust flange mounting supports heavy gearboxes, electric actuators, and pneumatic/hydraulic actuators without compromising alignment or introducing torque stress on the pipe flanges.
7. Long Service Life in Demanding Media
When combined with ductile iron (ASTM A536), stainless steel trim, or lined/seated configurations, these valves deliver extended service life in abrasive slurries, corrosive chemicals, and potable water systems.
8. Regulatory Compliance
Widely accepted in AWWA, API, EN, and ISO standards, double flanged butterfly valves are frequently specified for municipal, industrial, and fire protection systems worldwide.
Main Component Materials
| Component Name | Materials |
|---|---|
| Valve body | Ductile iron lined with rubber, Stainless steel lined with rubber, Carbon steel lined with rubber, copper lined with rubber, ductile iron lined with PTFE, stainless steel lined with PTFE, carbon steel lined with PTFE, copper lined with PTFE, etc. |
| Shaft sleeve | Lubricating bronze, PTFE |
| Valve shaft | Stainless steel, carbon steel electroplating, alloy steel 17-4, 420 steel, 416 steel |
| Valve plate | Galvanized ductile iron plate, nylon coated ductile iron plate, Ductile iron lined PTFE plate, stainless steel plate, Dual phase steel plate, carbon steel plate, copper plate |
| Pin | Stainless steel, Monel alloy, Hastelloy alloy, etc. |
| O ring | FPM, NBR |
Packaging & Delivery
