Fully PTFE Lined Lug Type Butterfly Valve (DN80, PN16)
Description
Fully PTFE Lined Lug Type Butterfly Valve (DN80, PN16) – Technical Datasheet
1. Product Overview
This product is a high-performance Fully PTFE Lined Lug Type Butterfly Valve, designed for reliable flow control and isolation in highly corrosive industrial pipelines. As shown in the provided images, it features a robust black epoxy-coated ductile iron body, a fully PTFE lined wetted path (visible as the white internal lining and disc encapsulation), and a manual lever/gearbox operator. The cast markings clearly indicate “DN80” and “PN16”. The PTFE lining completely isolates the metal body from the media, making this valve ideal for aggressive chemical processing, acid handling, water treatment, and pharmaceutical applications.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Fully PTFE Lined Lug Type Butterfly Valve |
| Body Material | Ductile Iron (QT450), Black Epoxy Coated + PTFE Lining |
| Disc Material | Ductile Iron / Stainless Steel with PTFE Encapsulation |
| Nominal Diameter (DN) | DN80 (3″) |
| Nominal Pressure (PN) | PN16 (1.6 MPa) |
| Connection Type | Lug Type (Threaded inserts for flange mounting) |
| Operation Mode | Manual Lever / Gearbox Operated |
| Applicable Temperature | -20°C ~ +150°C (Depends on PTFE/PFA grade) |
| Applicable Medium | Strong acids, bases, solvents, corrosive chemicals, water, sewage |
| Design Standard | API 609 / EN 593 / GB/T 12238 |
| Leakage Class | Zero Leakage (Complies with ISO 5208 Grade A) |
3. Material of Main Parts (Based on Images)
| Part Name | Material Specification | Optional Material |
|---|---|---|
| Body | Ductile Iron (QT450), Black Epoxy Coating, Fully PTFE Lined | Stainless Steel (CF8/CF8M) |
| Disc | Ductile Iron / SS304 / SS316 with PTFE Encapsulation [White disc in image] | PFA Encapsulation |
| Seat | PTFE [White seat in image] | RPTFE / PFA |
| Stem | Stainless Steel (SS416 / SS304) with PTFE Sleeve | SS316 |
| Operator | Black Gearbox with Silver Lever Handle | Handwheel / Pneumatic / Electric |
| O-Ring | Viton / 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 |
| Top Mounting Pad | ISO 5211 (For easy actuator upgrade) |
5. Key Features
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Fully PTFE Lined (Superior Chemical Resistance): The entire wetted path (body interior, disc, and seat) is lined or encapsulated with PTFE. This completely isolates the ductile iron body from the media, providing exceptional resistance to strong acids, bases, and corrosive chemicals.
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Non-Stick & Anti-Adhesion: The PTFE surface prevents media buildup, scaling, and clogging, making it ideal for sticky or crystallizing fluids.
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Lug Type Design: The threaded lug inserts (visible in the images) allow the valve to be installed at the end of a pipeline or for downstream piping to be removed for maintenance without shutting down the entire system.
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Robust Anti-Corrosion Coating: The exterior ductile iron body is coated with a black epoxy resin, providing excellent protection against rust and corrosion in harsh industrial environments.
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Smooth Operation: The gearbox lever mechanism (black box with silver handle) provides smooth, labor-saving operation and allows the disc to be locked in multiple positions for precise flow regulation.
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Actuation Ready: The top mounting pad complies with ISO 5211 standards, allowing for easy upgrading from a manual lever to a pneumatic or electric actuator.
