1. Product Overview

The DN80 (3 inch) wafer butterfly valve from Laux Valve is a compact, lightweight flow control solution engineered for reliable performance in water supply, HVAC, wastewater treatment, and general industrial applications. Featuring a ductile iron body with a precision-molded EPDM seat, this wafer butterfly valve delivers reliable bi-directional shut-off, low operating torque, and extended service life.

The wafer-style body is designed to fit securely between ANSI Class 150 or PN10/PN16 flanges using through-bolts, providing a cost-effective and space-saving solution for continuous pipeline systems. As a professional butterfly valve manufacturer with over 13 years of export experience, Laux Valve ensures every wafer butterfly valve is manufactured and tested in compliance with API 609, EN 593, and MSS SP-67 international standards.

Available with lever handle, gearbox, pneumatic actuator, or electric actuator, this DN80 wafer butterfly valve offers flexible operation options to meet a wide range of system requirements. The compact design and lightweight construction make it ideal for tight installations where space and weight are key considerations.

2. Key Features & Benefits

• Wafer Style Design — Compact & Lightweight: The wafer body fits directly between flanges, eliminating the need for additional threaded connections. This design reduces overall system weight, simplifies installation, and lowers total project cost compared to flanged-end or lug-style alternatives.
• EPDM Seat — Excellent Resistance: The precision-molded EPDM (Ethylene Propylene Diene Monomer) seat provides outstanding resistance to water, steam, hot water, diluted acids, alkalis, and weather. EPDM is ideal for potable water applications and meets WRAS and NSF 61 standards for drinking water contact.
• Bi-Directional Class VI Shut-Off: The interference-fit EPDM seat provides bubble-tight bi-directional sealing in accordance with ANSI FCI 70-2 Class VI, ensuring zero leakage and maximum system efficiency.
• Ductile Iron Body — High Strength: The ductile iron (ASTM A536) body offers superior strength and impact resistance compared to gray cast iron, providing longer service life in demanding applications. Coated with high-build epoxy paint (RAL 5015 blue, 80-120 microns) for corrosion protection.
• ISO 5211 Top Flange — Direct Actuator Mounting: Standardized mounting pad allows direct installation of lever handles, gearboxes, pneumatic actuators, or electric actuators without additional brackets or adapters, simplifying upgrades and maintenance.
• Anti-Blowout Stem Design: One-piece stainless steel stem with anti-blowout retention feature ensures maximum operational safety by preventing stem ejection under pressure.
• Low Operating Torque: The hydrodynamically optimized disc profile reduces operating torque, resulting in smoother operation, smaller actuator sizing, and reduced energy consumption.
• Full Material Traceability: Every valve receives a unique serial number for complete traceability of raw material certifications, production records, and test results.
• 100% Hydrostatic Tested: Each valve undergoes hydrostatic shell testing at 1.5x rated pressure and seat leakage testing at 1.1x rated pressure before shipment.

3. Technical Specifications

4. Dimensions (mm)

Note: Dimensions are for reference only. Contact Laux Valve for certified dimensional drawings.

5. Typical Applications

• Municipal water supply and distribution networks
• HVAC and air conditioning systems
• Wastewater treatment plants
• Fire protection and sprinkler systems
• Agricultural irrigation systems
• Industrial cooling water circuits
• Food and beverage processing
• General industrial on-off and throttling service

6. Standards & Certifications

• Design: API 609, EN 593, MSS SP-67
• Flange Connection: ASME B16.5, EN 1092-1
• Face-to-Face: API 609, EN 558
• Testing: API 598, EN 12266-1
• Quality: ISO 9001:2015
• CE: PED 2014/68/EU
• Drinking Water: WRAS (UK), NSF 61/372 (USA) — optional
• Top Flange: ISO 5211

7. How to Order

To ensure correct configuration and pricing, please provide the following information:

1. Size: DN80 (3\")
2. Pressure Rating: PN10 / PN16 / Class 150
3. Body Material: Ductile Iron / Cast Iron
4. Disc Material: Ductile Iron / SS304 / SS316 / CF8M
5. Seat Material: EPDM / NBR / PTFE / FPM
6. Operation: Lever / Gearbox / Pneumatic / Electric
7. Quantity: Required number of units

8. Packaging & Shipping

• Packaging: Individually wrapped, plywood crate or carton box suitable for sea freight
• Port: Tianjin Port, China
• Shipping Terms: FOB / CIF / CFR / EXW / DDP
• Lead Time: 7-15 working days (standard), 15-30 days (custom)

9. Warranty

12-month warranty against manufacturing defects in materials and workmanship under normal use conditions.

10. Contact Laux Valve

Butterfly Valve Manufacturing Process
From Technical Confirmation to Final Delivery



Standardized Quality Control Process

From raw material inspection to final delivery, every butterfly valve undergoes a comprehensive quality inspection to ensure reliable performance and compliance with international standards.

International Certifications

Manufactured to international quality standards and certified for global industrial and potable water applications.