Wafer Type Butterfly Valve (Lever Handle)
Description
Wafer Type Butterfly Valve (Lever Handle) – Technical Datasheet
1. Product Overview
This product is a wafer-type soft-sealed butterfly valve featuring a concentric (centerline) design. It offers a compact structure, light weight, small operating torque, and easy installation. It is widely used in water treatment, petroleum, chemical, food, heating, and gas pipelines for shut-off or regulating purposes. As shown in the images, the valve body features a blue epoxy resin electrostatic coating, equipped with a black aluminum alloy lever handle. The disc is marked with “DI” (Ductile Iron) and “5K 10K” to meet various industrial requirements.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Wafer Type Butterfly Valve (Lever Operated) |
| Nominal Diameter (DN) | DN25 – DN250 (Examples shown: DN25, DN150, DN250; larger sizes available upon request) |
| Nominal Pressure (PN) | PN10 / PN16 (Marked 5K / 10K, corresponding to JIS 10K standard) |
| Connection Type | Wafer Type |
| Operation Mode | Manual (Lever / Handle) |
| Applicable Temperature | -20°C ~ 120°C (Depends on seat material) |
| Applicable Medium | Water, sewage, sea water, air, oil, weak acids & alkalis (Depends on seat material) |
| Leakage Class | Zero Leakage (Complies with GB/T 13927 / ISO 5208 Grade A) |
3. Material of Main Parts
| Part Name | Standard Material |
|---|---|
| Body | Ductile Iron (QT450-10), Blue Epoxy Resin Coated |
| Disc | Ductile Iron (DI) Nickel Plated / Stainless Steel (SS304 / SS316) [Marked “DI” as shown] |
| Seat | EPDM / NBR / PTFE [Black rubber shown in images] |
| Stem | Stainless Steel (SS416 / SS304) |
| Lever Handle | Aluminum Alloy (Black Coated), with gear locking mechanism |
| O-Ring | NBR / EPDM |
4. Applicable Standards
| Standard Type | Reference Standard |
|---|---|
| Design & Manufacture | API 609 / EN 593 / JIS B2032 / GB/T 12238 |
| Flange Connection | ANSI B16.5 / DIN 2501 / JIS B2212 / GB/T 17241.6 |
| Face to Face | API 609 / EN 558-1 / ISO 5752 / GB/T 12221 |
| Pressure Test | API 598 / EN 12266 / GB/T 13927 |
5. Key Features
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Compact & Easy Installation: Wafer connection design saves space between flanges, reduces weight, and simplifies pipeline installation and maintenance.
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Reliable Bi-directional Sealing: The concentric soft-seat structure ensures a tight fit between the rubber seat and the disc, achieving zero leakage in both directions.
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Smooth & Labor-Saving Operation: Equipped with a black aluminum alloy lever handle featuring a gear locking mechanism, allowing for multi-angle adjustment of the disc opening with low operating torque.
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Superior Anti-Corrosion & Long Lifespan: The ductile iron body undergoes electrostatic epoxy resin coating (blue finish), providing excellent rust and corrosion resistance.
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Clear Markings & Complete Specifications: The body and disc are cast with clear markings (e.g., DN, DI, 5K/10K) for easy on-site identification and selection.
