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Wafer Concentric (Centerline) Butterfly Valve
Technical Requirement:
- Design & Manufacture: GB/T 12238
- Face-to-Face: GB/T 12221 (wafer series)
- Mating Flanges: GB/T 17241.6 (PN10 / PN16)
- Inspection & Test: GB/T 13927
Description
The Wafer Concentric (Centerline) Butterfly Valve is a wafer-style concentric butterfly valve clamped between two pipe flanges. Its symmetrical centerline design, resilient seat and lever operator provide quick quarter-turn shut-off in a very compact, lightweight package. The red epoxy finish makes it easy to identify in fire protection and building service installations.
Technical Specifications:
- Pressure Class: PN10 / PN16
- Size Range: DN40 – DN300
- Applicable Medium: Water, fire water, air, neutral liquids
- Operating Temperature: -10°C to 80°C
Main Parts and Materials:
| Parts Name | Materials |
| Body | Ductile Iron QT450-10 |
| Disc | Ductile Iron (nickel-plated) / Stainless Steel |
| Seat | EPDM |
| Shaft | Stainless Steel 2Cr13 |
| Handle | Carbon Steel, coated |
Key Product Features:
- Wafer Installation: Fits between standard flanges with minimum length and weight.
- Centerline Disc: Symmetrical design seals equally in both directions.
- Resilient Seat: EPDM seat provides bubble-tight closure and protects the body.
- Lever Operation: Fast 90° opening with notch plate locking.
- Red Epoxy Coating: Durable, corrosion-resistant and easily identified as fire-service equipment.
Applications:
Ideal for Fire Protection Systems, HVAC Chilled Water, Building Water Supply, and Light Industrial Lines. Specifically suited for compact installations requiring quick on/off control.
Additional information
| Standard | GB |
|---|
