Premium Centerline Butterfly Valves: Resilient Seating for Precision Flow Control
Soft Seated Butterfly Valves | EPDM Seated Butterfly Valves
In demanding industrial environments, the integrity of your flow control system hinges on the quality of your valves. Our Centerline butterfly valve lineup is engineered to provide a leak-proof, cost-effective solution for liquid and gas applications. By utilizing a concentric design, these valves ensure uniform compression and reduced wear, positioning them as the backbone of modern fluid architecture.
1. The Engineering Advantage of the Centerline Design
Unlike high-performance double or triple-offset valves, the centerline (concentric) butterfly valve features a stem that passes through the center of the disc and the center of the pipe.
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360° Sealing: The disc makes contact with the seat over the entire circumference, ensuring a consistent seal.
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Bi-Directional Flow: These valves are designed to handle flow from either direction without loss of performance.
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Streamlined Profile: The slim body design reduces the overall weight of the piping system and simplifies installation in tight spaces.
2. Why Specify a Soft Seated Butterfly Valve?
When your application requires a bubble-tight shut-off, a soft seated butterfly valve is the definitive choice. While metal-seated valves are reserved for extreme temperatures, soft seats provide a superior seal by deforming slightly to "wrap" around the disc edge.
Performance Highlights:
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Zero Leakage (Class VI): Ideal for vacuum services and high-purity water systems where even a single drop of bypass is unacceptable.
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Internal Protection: The resilient seat typically wraps around the valve body, acting as a built-in flange gasket and protecting the body from the corrosive media.
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Lower Torque Requirements: The lubricity of modern elastomers allows for smaller, more affordable actuators (pneumatic or electric).
3. The EPDM Seated Butterfly Valve: Material Excellence
Material selection is the most critical factor in valve longevity. The EPDM seated butterfly valve is our most requested configuration due to its versatility and chemical stability.
Technical Properties of EPDM Seats
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Temperature Resilience: Maintains elasticity and sealing force from -20°C to 120°C.
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Oxidation Resistance: Exceptional resistance to UV, ozone, and atmospheric aging, making it perfect for outdoor installations.
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Media Compatibility: Best suited for:
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Potable Water (NSF-61 compliant options)
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HVAC Condenser and Chilled Water
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Alkaline and Acidic solutions (low concentration)
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Pressurized Air Systems
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Warning for Engineers: EPDM should never be used with petroleum-based oils, greases, or hydrocarbon fuels, as these will cause the seat to swell and fail. For those applications, we recommend our NBR or Viton options.
4. Technical Specifications Table
Feature | Industrial Standard | Our Specification |
|---|---|---|
Size Range | 2" to 48" (DN50 - DN1200) | Full range available in stock |
Pressure Class | ASME Class 150 / PN10 / PN16 | Rated up to 232 PSI (16 Bar) |
Body Materials | CI, DI, WCB, CF8M | Ductile Iron GGG40/50 (Standard) |
Seat Material | EPDM / NBR / PTFE | High-Density EPDM (Standard) |
Face-to-Face | API 609 / ISO 5752 | Short & Long pattern available |
Top Flange | ISO 5211 | Universal mounting for easy actuation |
5. Applications and Industry Use-Cases
Our valves are rigorously tested to meet global standards (API, CE, ISO), making them suitable for:
6. Maintenance and Longevity
The modular design of our soft seated butterfly valves allows for field-replaceable seats. This means that instead of replacing an entire valve assembly, you can simply swap the elastomer seat during scheduled outages, significantly reducing your Total Cost of Ownership (TCO).
Ready to optimize your flow? Contact our engineering team today for a CAD drawing or a bulk quote for your next project.
Flowtorq Engineering India Pvt. Ltd.
60 Ft Road, Fatima nagar - Naigaon, Bhiwandi 421302, MH, India
Phone
+91-7028405198
+91-9028305198
+91-8007405198