24"  Class 150 Lug Butterfly Valve — EPDM Lined Disc

The 24-inch (DN600) Class 150 lug type butterfly valve from Laux Valve is a high-performance, large-diameter valve designed for demanding water, wastewater, and industrial processing applications. Featuring a ductile iron body with an EPDM lined disc, this butterfly valve provides exceptional corrosion resistance, reliable bi-directional sealing, and extended service life even under continuous operation. Whether used in municipal water distribution, sewage treatment, HVAC systems, or chemical processing plants, this valve delivers consistent, leak-free performance.

As a professional butterfly valve manufacturer with over 13 years of experience, Laux Valve ensures every Class 150 lug butterfly valve meets stringent international standards. The lug-style body design incorporates fully threaded bolt holes, enabling dead-end service at full rated pressure — a critical feature for pipeline isolation and downstream maintenance. The valve is fully compatible with ANSI B16.5 Class 150 flanges and is available with manual gearbox, pneumatic actuator, or electric actuator options to suit different operational requirements.

Key Features & Benefits

• EPDM Lined Disc — Superior Corrosion Resistance: The ductile iron disc is fully encapsulated with high-quality EPDM (Ethylene Propylene Diene Monomer) rubber, offering excellent resistance to water, steam, hot water, diluted acids, alkalis, and mild chemicals. The EPDM lining also provides outstanding ozone and weather resistance, making it ideal for outdoor installation. Suitable for potable water systems compliant with WRAS and NSF 61 standards.
• Lug Style Design — Dead-End Service Capability: The valve body features threaded bolt inserts on both flanges, allowing quick and secure installation between ANSI Class 150 flanges. The lug body design supports dead-end service at full rated pressure, eliminating the need for a downstream flange during maintenance — a significant advantage for pipeline isolation applications.
• Bi-Directional Class VI Shut-Off: The precision-molded EPDM seat provides tight bi-directional sealing in accordance with ANSI FCI 70-2 Class VI, ensuring minimal leakage (zero leakage in most applications) and maximum system efficiency.
• Large Diameter — 24\" (DN600): Designed for high-flow municipal water supply, wastewater treatment, and industrial cooling water pipelines. The large bore minimizes pressure drop across the valve, reducing pumping costs and improving overall system energy efficiency.
• ISO 5211 Direct Mounting Pad: The top flange complies with ISO 5211 standards, enabling direct and easy mounting of manual gearboxes, pneumatic actuators, or electric actuators without the need for additional mounting brackets or adapters, simplifying installation and reducing cost.
• Anti-Blowout Stem Design: The one-piece stainless steel stem is designed with an anti-blowout retention feature, ensuring the stem remains securely retained within the valve body even under high-pressure conditions, providing maximum operational safety for personnel and equipment.
• Corrosion Protection — Epoxy Coating: The ductile iron body is coated with a durable epoxy paint finish (standard RAL 5015 blue, customizable), providing long-term protection against corrosion in water, wastewater, and mildly corrosive environments. Coating thickness: 80-120 microns.
• Low Operating Torque — Extended Actuator Life: The hydrodynamically optimized disc profile reduces operating torque requirements, resulting in smoother operation, smaller actuator sizing, and extended service life of both the valve and actuation equipment.
• Full Material Traceability: Every valve is assigned a unique serial number, enabling complete traceability of raw material certifications, production records, dimensional inspection reports, and hydrostatic test results throughout the product's lifecycle.
• OEM/ODM Customization Available: Custom stem lengths, special coating colors, unique disc materials, and tailored actuation packages available upon request with competitive lead times.

3. Material Specifications

EPDM Rubber Properties

4. Technical Specifications

5. Dimensional Data (24\" / DN600)

Note: Dimensions are for reference only. Please request certified dimensional drawing for final installation.

6. Applications

This 24\" DN600 Class 150 lug butterfly valve is suitable for a wide range of industrial and municipal applications, including but not limited to:

• Municipal water supply, treatment, and distribution pipeline systems
• Wastewater treatment plants (WWTP) — influent, effluent, and sludge lines
• Sewage collection and transfer pumping stations
• HVAC systems — chilled water, hot water, and condenser water loops
• Fire protection systems — fire mains, sprinkler systems, hydrant networks
• Industrial cooling water intake and circulation systems
• Power generation plants — cooling towers and raw water systems
• Agricultural irrigation and land drainage projects
• Food and beverage processing facilities
• Marine and shipbuilding piping systems (ballast, cooling, bilge)
• Mining and mineral processing — slurry and process water lines
• Desalination plants — seawater intake and brine discharge

7. Installation Guidelines

Proper installation is essential for optimal valve performance and service life. Follow these guidelines when installing the 24\" DN600 lug butterfly valve:

1. Pre-Installation Check: Inspect the valve for any visible damage during transit. Verify the valve size, pressure rating, and flange compatibility match the pipeline specifications.
2. Pipeline Preparation: Ensure the pipeline flanges are clean, free of debris, weld spatter, and gasket remnants. The pipe ends should be properly aligned with no offset or angular misalignment.
3. Valve Positioning: Insert the valve between the flanges with the disc in a slightly open position (10-15°) to prevent seat damage during installation. Center the valve body between the flanges.
4. Bolting: Insert bolts through the flange holes and valve lug holes. Tighten bolts gradually in a cross-pattern sequence to ensure even compression of the seat. Do not over-tighten — refer to recommended torque values.
5. Disc Operation Check: After installation, fully open and close the valve to verify smooth operation and proper sealing. Ensure the disc does not interfere with the pipe bore.
6. Actuator Mounting (if applicable): Mount the actuator on the ISO 5211 top flange. Check actuator alignment, tighten mounting bolts, and perform a full stroke test before commissioning.
7. Do Not Use Valve as a Pipe Support: The valve must be independently supported. Do not use the valve body to support the weight of the pipeline.

8. Maintenance & Service Recommendations

Regular maintenance ensures long-term reliable performance of your Laux Valve butterfly valve:

• Periodic Inspection: Inspect the valve every 6 months or per plant maintenance schedule. Check for external leakage, corrosion, and smooth disc operation.
• Seat Replacement: The EPDM liner seat is replaceable. If leakage is detected at the seat, the liner can be replaced without replacing the entire valve. Contact Laux Valve for replacement parts.
• Stem Seal Inspection: Check stem O-rings for wear during routine maintenance. Replace if signs of leakage are observed at the stem area.
• Actuator Maintenance: For gearbox-operated valves, lubricate the gearbox per manufacturer's instructions annually. For pneumatic actuators, check air supply quality and filter condition. For electric actuators, verify electrical connections and limit switch adjustments.
• Storage: If the valve is to be stored before installation, keep it indoors in a dry, clean environment. Keep the disc slightly open (10°) to relieve seat pressure. Protect flange faces and the top flange from damage.

9. Standards & Certifications

• Design Standard: API 609, EN 593, MSS SP-67, ISO 10631
• Flange Connection: ASME B16.5 Class 150 / EN 1092-1 PN10/PN16
• Face-to-Face: API 609 Table 1 / EN 558 Series 20
• Testing & Inspection: API 598, EN 12266-1 (Hydrostatic Shell Test, Seat Leakage Test, Torque Verification)
• Top Flange: ISO 5211
• Coating: ISO 12944 (Corrosion Protection of Steel Structures)
• Quality Management: ISO 9001:2015 — Certified Manufacturing Facility
• CE Marking: PED 2014/68/EU (Pressure Equipment Directive) Category I/II
• WRAS Approved: UK Water Regulations Advisory Scheme — suitable for potable water contact
• NSF 61 Certified: USA/Canada drinking water system components

10. Quality Control & Testing

Every Laux Valve butterfly valve undergoes rigorous quality control procedures throughout the manufacturing process:

• Incoming Material Inspection: All raw materials are verified against material test certificates (MTC 3.1) and inspected for dimensional compliance upon receipt.
• In-Process Inspection: During casting, machining, and assembly, dimensional checks are performed at each critical stage using calibrated measuring instruments.
• Hydrostatic Shell Test: The valve body is pressure-tested at 1.5x the rated pressure (Class 150: 300 psi / 20.7 bar) to verify structural integrity. Duration: minimum 60 seconds per API 598.
• Seat Leakage Test: Bi-directional seat leakage test performed at 110% of rated pressure differential. Acceptance criteria: Class VI per ANSI FCI 70-2 (virtually zero leakage).
• Operational Torque Test: Full stroke operation under rated pressure is performed to verify torque values and smooth operation.
• Coating Inspection: Epoxy coating thickness is measured using a dry film thickness gauge. Adhesion test performed per ASTM D3359.
• Final Inspection: Each valve is visually inspected, tagged with a unique serial number, and accompanied by a test certificate before packaging and dispatch.

11. Optional Configurations & Accessories

Laux Valve offers a wide range of optional configurations and accessories to meet specific application requirements:

12. Why Choose Laux Valve — Competitive Advantages

13. Packaging & Shipping

• Packaging: Each valve is individually wrapped in protective plastic, secured in a custom plywood crate or steel frame wooden case suitable for sea freight. Flange faces are protected with plastic caps. All accessories are packed separately with clear labeling.
• Shipping Documents: Commercial Invoice, Packing List, Bill of Lading / Air Waybill, Certificate of Origin (COO), Material Test Certificate (MTC 3.1), Hydrostatic Test Report, Valve Tag with serial number.
• Port of Loading: Tianjin Port, China (or as requested)
• Shipping Terms: FOB, CIF, CFR, EXW, DDP available
• Delivery Time: Standard sizes: 7-15 days. Custom orders: 15-30 days.

14. Warranty

Laux Valve provides a 12-month warranty from the date of shipment against manufacturing defects in materials and workmanship under normal use and service conditions. Warranty covers replacement of defective valves or components at no charge. The warranty does not cover damage caused by improper installation, misuse, unauthorized modification, or normal wear and tear of replaceable seat materials.

15. How to Order

To ensure correct configuration and pricing, please provide the following information when placing your inquiry or order:

1. Size: 24\" / DN600
2. Pressure Rating: Class 150 / PN16
3. Body Material: Ductile Iron / Cast Iron / Carbon Steel / Stainless Steel
4. Seat Material: EPDM / NBR / PTFE / FPM
5. Operation Type: Lever / Gearbox / Pneumatic / Electric
6. Actuator Accessories (if required): Solenoid Valve, Limit Switch Box, Positioner, Air Filter Regulator
7. Quantity: Required quantity and preferred delivery schedule
8. Special Requirements: Coating color, extended stem, special testing, certification documents

16. 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.