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In modern fluid handling systems, the EPDM seated butterfly valve delivers an exceptional balance of durability and cost-efficiency. Our specialized lineup includes the Water treatment stainless steel EPDM seated butterfly valve, a premium solution designed for rigorous water purification and distribution environments. This valve features a fully stainless steel body coupled with a precision-molded EPDM liner, ensuring superior corrosion resistance and a leak-free shut-off across countless cycles. It meets key international standards such as API 609, EN 593, and ISO 5752, and can be supplied in wafer, lug, or double-flanged configurations to accommodate various piping layouts. With a temperature range suitable for both cold and hot water lines, and compatibility with pneumatic and electric actuators, this component simplifies automation in municipal water plants, reverse osmosis systems, and chemical dosing skids without compromising reliability.
The EPDM seated butterfly valve is engineered to provide worry-free performance in demanding media. Its EPDM seat resists ozone, weather, and chemicals such as dilute acids and alkalis, making it ideal for water, seawater, and mild chemical services. The disc and stem combination, typically made of stainless steel 316, minimizes turbulence and dynamic torque, allowing the use of smaller, lower-cost actuators. Every EPDM seated butterfly valve undergoes a full shell and seat leakage test according to EN 12266-1 Rate A, ensuring zero visible leakage at full rated pressure. Maintenance is straightforward: the seat can be replaced without removing the disc, and the blowout-proof stem adds an extra layer of safety. From cooling towers and swimming pool filtration to desalination units, the EPDM seated butterfly valve consistently delivers tight shut-off, long service life, and simple installation across all industrial sectors.
| Parameter | Specification |
|---|---|
| Valve Type | EPDM Seated Butterfly Valve |
| Size Range | DN40 – DN1200 (1½” – 48”) |
| Pressure Class | PN6, PN10, PN16, Class 125/150 |
| Working Temperature | -10°C to +120°C (EPDM) |
| Body Styles | Wafer, Lug, Double Flanged |
| Body Material | SS304, SS316, CF8, CF8M |
| Disc Material | SS304, SS316, CF8M, Ductile Iron Epoxy Coated |
| Stem Material | AISI 420, 431, 316 |
| Seat / Liner | EPDM (standard) |
| Face-to-Face | ISO 5752, EN 558 Series 20/25/16 |
| Top Flange | ISO 5211 universal square drive |
| Actuation Options | Lever, Gearbox, Pneumatic, Electric |
| Leakage Rate | EN 12266-1 Rate A (bubble-tight) |
| No. | Component | Material |
|---|---|---|
| 1 | Body | ASTM A351 CF8M / SS316 |
| 2 | Disc | ASTM A351 CF8M / SS316 |
| 3 | Seat Liner | EPDM (peroxide-cured) |
| 4 | Stem | ASTM A276 Grade 316 |
| 5 | O-Ring | EPDM or FKM |
| 6 | Stem Bearing | PTFE-impregnated bronze |
| 7 | Bushing / Seal | PTFE / NBR |
| 8 | Actuator Housing | Ductile Iron or Aluminum |
Typical installations include potable water networks, wastewater treatment basins, cooling circuits, chemical transfer stations, and desalination skids. The stainless steel construction combined with the resilient EPDM liner creates a maintenance-friendly barrier against rust and scaling. All configurations are designed for fast on-site assembly and can be delivered with factory-fitted actuation to reduce commissioning time.
When it comes to fluid control in demanding environments, standard cast iron valves often fall short. Introducing the EPDM seated butterfly valve by Zhongguan Valve—engineered with an all-stainless steel structure to deliver exceptional longevity, superior corrosion resistance, and flawless sealing performance.
1. Robust All-Stainless Steel Construction
The valve body and disc are crafted from high-grade SS304 or SS316 stainless steel. This makes our EPDM seated butterfly valve highly resilient against seawater, potable water, high humidity, and mildly corrosive media. Compared to traditional cast iron alternatives, it offers a significantly extended service life, making it the ideal choice for coastal regions, marine engineering, water treatment plants, and food processing industries.
2. High-Resilience EPDM Elastomer Seat
Equipped with a premium EPDM rubber seat, the valve exhibits outstanding elasticity, recovery, and aging resistance. This ensures a tight, zero-leakage seal even under high-frequency cycling. It is perfectly optimized for handling water, air, sewage, and light chemical media.
3. Low Torque & Effortless Operation
The stainless steel disc undergoes a precision polishing process to drastically reduce fluid resistance. Paired with our finely machined stem structure, the EPDM seated butterfly valve operates smoothly with minimal torque, reducing wear on actuators and lowering your overall operational costs.
4. Global Standards & Flexible Connections
To seamlessly fit into diverse international piping configurations, we offer multiple connection types including Wafer, Lug, and Flanged styles. Our manufacturing complies strictly with global standards such as GB, DIN, ANSI, and JIS.
5. Multi-Actuator Compatibility
Whether your system requires manual or automated control, our valves can be effortlessly configured with handwheels, worm gears, pneumatic actuators, or electric actuators to match your specific torque and automation requirements.
6. Full-Size Availability & Rapid Delivery
We maintain an extensive inventory of standard sizes from DN40 to DN300 for immediate shipment. For large-scale projects, sizes from DN350 up to DN1600 can be quickly customized to meet your bulk procurement timelines.
Where should the EPDM seated butterfly valve be deployed? Thanks to its versatile design, it excels in the following sectors:
Water & Wastewater Treatment: Ideal for municipal water supply lines and sewage plants where rust prevention is critical for long-term reliability.
Commercial HVAC Systems: Provides dependable flow control for chilled and hot water systems in modern buildings to optimize climate control.
Food & Beverage Processing: Built with sanitary-grade stainless steel surfaces that prevent contamination, making it safe for drinking water, dairy, and beverage production lines.
Marine & Offshore Projects: Highly resistant to salty sea air and brine, making it a staple for shipbuilding, docks, and offshore platforms.
Agricultural Irrigation: A durable, heavy-duty solution capable of managing daily water distribution in large-scale farming and landscaping setups.
Selecting our EPDM seated butterfly valve means investing in operational peace of mind. Here is what sets our product apart:
Maximum Longevity: High-grade alloys mean fewer replacements and reduced downtime. Zero Leakage: The precision-molded EPDM seat cuts down fluid waste and boosts system safety. User-Friendly Design: Compact, lightweight, and operational via a simple 90-degree turn. Unmatched Value: High-end performance delivered at highly competitive, factory-direct pricing.
About Zhejiang Zhongguan Valve Manufacture Co., Ltd.
With over 19 years of dedicated industry experience, Zhongguan Valve is a trusted name in fluid control solutions. We operate two specialized production bases in Tianjin and Wenzhou, strategically leveraging a robust dual-supply chain: high-quality cast iron components from the North and advanced cast steel/stainless steel manufacturing in the South.
Our Oubei facility in Wenzhou—the heart of China’s pump and valve industry—boasts more than a decade of specialized expertise in manufacturing premium butterfly valves. Our products have earned international acclaim across Southeast Asia, including major water plants in Singapore, infrastructure projects in Malaysia, and commercial constructions in Vietnam.
Our manufacturing plants are equipped with comprehensive, state-of-the-art production machinery to ensure precision at every step:
Advanced valve pressure testing machines (100% stress testing for shell and seal reliability).
High-precision valve seat installation and shaft sleeve pressing equipment.
Automated valve marking and engraving systems.
100% Quality Traceability: Every single EPDM seated butterfly valve undergoes rigorous pressure testing before leaving the factory, with data archived for complete traceability.
One-Stop Procurement Integration: In addition to butterfly valves, we integrate supply chains to provide a comprehensive product portfolio including ball valves, gate valves, check valves, foot valves, and strainers—saving you procurement time and costs.
Expert Technical Selection: Our engineers assist you in choosing the exact valve specifications based on medium, temperature, and pressure ratings to prevent costly engineering errors.
Full OEM/ODM Customization: Tailor your order with customized body colors, custom actuator configurations, specific torque designs, specialized packaging, and private logo/nameplate branding.
1-Year Warranty & Rapid After-Sales: We back our products with a comprehensive 1-year warranty. If any quality issue arises, we offer free replacements and provide immediate technical troubleshooting support.
