Wafer Butterfly Valve | Bidirectional Zero Leak Soft Seal Industrial Valve
Description：
Wafer butterfly valve follows EN manufacturing standards, DN20-DN1200 size range, low torque & maintenance-free design, bidirectional Class A tight sealing. Suitable for water treatment, chemical, shipbuilding & energy industries, shipped from Qingdao Port with 18-month warranty.
Product Overview
Our wafer butterfly valve is a universal clamp-type pipeline valve manufactured strictly in line with EN 593 industrial standards. A wide selection of valve body and sealing liner materials can be matched to adapt to various complex and harsh working environments across different sectors.
This valve delivers complete bidirectional tight sealing that reaches EN 12266 Leakage Rate A standard. Precision machining on the valve body and disc significantly cuts operating torque and extends overall service life. Three built-in shaft bearings effectively prevent valve stem deflection, maintaining ultra-high positioning accuracy even after years of frequent opening and closing cycles.
It supports free mounting in any direction, with fully detachable and recyclable internal components requiring zero routine maintenance. We provide optional silicon-free surface finishing specially customized for coating production lines. The stable working temperature spans from -40℃ to +200℃, compatible with PN10, PN16 and Class 150 pressure grades, and fully meets EN and ISO global industry standards.
Core Product Advantages
1. Bidirectional Class A Zero Leakage Sealing & Wide Medium Compatibility
The soft-seal structure achieves full bidirectional tight shutoff without medium leakage. Multiple liner materials including NBR, EPDM, CSM, FPM and PTFE are available to handle clean water, sewage, chemical liquids, dry powder, seawater and corrosive gas. The broad temperature range of -40℃ to +200℃ covers most conventional industrial pipeline working conditions.
2. Low Operating Torque, Long Service Life & Maintenance-Free Structure
Precision polished valve disc and body greatly reduce the force required for switch operation. Triple bearing layout locks the valve stem stably to avoid offset under long-term vibration. No lubrication or regular part replacement is needed during service, and all disassembled parts can be recycled, effectively lowering long-term operational costs for your factory.
3. Standardized Universal Design & Flexible Installation Matching
The valve complies with unified EN and ISO dimensional specifications, covering nominal diameters DN20 to DN1200. Four flange positioning holes ensure accurate alignment during installation, and there is no restriction on mounting angle. The top connection flange follows EN ISO 5211 specifications, which can be directly fitted with manual handles, pneumatic and electric actuators of mainstream brands. Custom silicon-free surface treatment is offered for coating industry pipelines.
Complete Technical Specifications
Specification Item | Detailed Parameters |
Model | Wafer Butterfly Valve |
Nominal Diameter | DN20 ~ DN1200 (DN20 only supports PN10 / PN16 pressure) |
Face-to-Face Dimension Standard | EN 558 Series 20, ISO 5752 Series 20 |
Connecting Flange Standard | EN 1092 PN6/10/16, ASME Class 150, AS 4087 PN16 |
Sealing Surface Standard | EN 1092 Form A/B, ASME RF, FF |
Top Mount Flange Standard | EN ISO 5211 |
Sealing Performance Grade | EN 12266 Leakage Rate A, ISO 5208 Category 3 |
Maximum Working Pressure | 16 bar |
Working Temperature Range | -40℃ ~ +200℃ (subject to working pressure, medium and liner material) |
Optional Body Materials | GG25 cast iron, aluminum alloy, stainless steel |
Optional Liner Materials | NBR, EPDM, CSM, FPM, PTFE, silicone rubber |
Valve Stem Type | Single stem / double stem optional, flat shaft end design |
Applicable Medium | Tap water, sewage, chemical fluid, pneumatic conveying powder, seawater, flue gas, hazardous liquid transport |
Drive Mode | Manual lever, pneumatic actuator, electric actuator |
Custom Options | Custom body paint color, silicon-free surface finishing, special customized sealing liners |
Applicable Industries
This wafer butterfly valve is widely deployed in automatic pipeline systems of multiple industrial fields:
Chemical and petrochemical production
Municipal water supply, wastewater and sewage treatment
Dry powder pneumatic conveying equipment
Ship piping systems
New energy and power engineering projects
Hazardous material liquid transportation pipelines (compliant with EN 14432)
Custom Product Attributes
1.Product Color: Standard blue anti-corrosion coating, customized color available on request
2.Shipping Port: Qingdao Port, China
3.Working Efficiency: Low torque structure, rapid opening/closing response, stable flow adjustment performance
4.After-sales Service: 18-month factory quality warranty, lifetime free technical consultation
5.Production Lead Time: 3–7 working days for standard in-stock sizes
6.Installation Feature: Omni-directional unrestricted mounting
7.Maintenance Cost: Zero daily maintenance, minimal long-term operation expenditure
8.Customization Support: Custom body material, special liner formula, silicon-free treatment for coating workshops
9.Export Packaging: Standard export carton or solid fumigated wooden case
10.Technical Document Supply: Free CAD dimension drawings, torque data and Kv flow coefficient charts for engineering design
