Language
Zhongguan ETFE coated disc butterfly valve represents a significant advancement in corrosion-resistant flow control technology. Engineered for the most demanding chemical environments, this valve utilizes an ETFE (ethylene-tetrafluoroethylene) coating on the disc surface to deliver exceptional resistance to aggressive media, with a service temperature range of -40℃ to 150℃ (specific temperature application dependent on seat material selection) and a coating thickness of 0.5-1.2mm.
As a specialized concentric butterfly valve manufacturer with over 19 years of industry experience, Zhongguan has developed this ETFE coated solution to meet the rigorous demands of chemical processing, water treatment, and industrial applications worldwide-2-7.
ETFE (ethylene-tetrafluoroethylene) is a high-performance fluoropolymer that is uniformly applied to the butterfly disc surface through an electrostatic spraying process, forming a dense protective layer with a thickness of 0.5~1.2mm. In the ETFE coated disc butterfly valve, the core functions of this coating include:
1. Superior Chemical Corrosion Resistance ETFE coating demonstrates outstanding resistance to a wide spectrum of corrosive media, including 98% sulfuric acid, 37% hydrochloric acid, strong alkalis (such as 50% NaOH), and organic solvents (including acetone and xylene), with a corrosion rate of less than 0.01mm/year. Academic research has confirmed that ECTFE/ETFE coatings provide a protection rate of 99.29% against corrosion, with the outer surface remaining structurally stable even after extended exposure to corrosive environments-5-10.
2. Wide Temperature Range Capability Long-term service temperature range of -40℃ to 150℃, with short-term resistance to 180℃ thermal shock, making it suitable for applications involving extreme temperature fluctuations.
3. Low Permeability The dense molecular structure of ETFE effectively prevents medium penetration, protecting the metal substrate of the butterfly disc from corrosion. Research indicates that while edge corrosion may occur slowly over time, the coating's compact structure maintains excellent barrier performance-5-10.
4. Wear Resistance and Anti-Sticking Properties With a surface friction coefficient as low as 0.3, the ETFE coating reduces adhesion of granular media, extends maintenance cycles, and ensures smooth operation even in abrasive service conditions.
5. Superior Mechanical Strength Compared to PTFE or PP coatings, ETFE offers more than 50% higher mechanical strength, particularly under frequent opening and closing conditions, effectively preventing coating cracking and delamination.
To fully leverage the physical properties of ETFE coating, our ETFE coated disc butterfly valve incorporates targeted design features:
1. Precision Machined Butterfly Disc The base material is crafted from 316L stainless steel or duplex steel, with surface roughness ≤Ra3.2μm achieved through CNC turning, providing a uniform adhesion foundation for the coating. The disc edge features rounded contours to avoid stress concentration and prevent coating failure.
2. Bidirectional Sealing System Equipped with EPDM or FKM soft sealing valve seats, forming a "rigid-flexible composite" sealing interface with the ETFE coating. This design achieves bidirectional zero leakage at pressures up to PN16 (in accordance with ISO 5208 standard), ensuring reliable shut-off performance-3-8.
3. ISO5211 Drive Adaptation The valve stem top features a square shaft interface (in accordance with ISO5211 F05-F10 standard), enabling direct installation of pneumatic/electric actuators with torque output error ≤5%, facilitating automation integration.
4. Multiple Body Configurations Available in wafer, lug, and flange types to accommodate various piping system requirements, with a main production diameter range from DN40 to DN1600 (larger sizes available upon request)-2.
The ETFE coated disc butterfly valve is designed for the following demanding media:
1. Strong Acids/Alkalis
Electroplating solutions (containing chromic acid)
Wet chlorine gas in chlor-alkali processes
Phosphoric acid concentrate
Seawater and brine systems-3-8
2. Organic Solvents
Petrochemical intermediates such as benzene, esters, and ketones
3. Oxidizing Media
Hydrogen peroxide (concentration ≤50%)
Sodium hypochlorite solutions
4. High-Purity Fluids
CIP/SIP cleaning agents in pharmaceutical and food industries
Ultrapure water delivery systems
Chemical Processing Ideal for handling aggressive chemicals in petrochemical, metallurgical, and environmental protection systems-3-8.
Water and Wastewater Treatment Excellent for seawater desalination plants, drinking water systems, and wastewater treatment facilities-7.
Food and Beverage Suitable for sanitary applications requiring cleanability and corrosion resistance.
Power Generation Effective in cooling water systems of thermal power plants.
Zhongguan Valve, with production bases in Tianjin and Wenzhou, leverages over 19 years of valve manufacturing expertise. Our ETFE coated disc butterfly valves undergo:
Stringent Pressure Testing: Shell and seal testing in accordance with API 598, ISO 5208, and EN 12266 standards-3-8
Precision Assembly: Utilizing specialized equipment for seat installation, shaft sleeve fitting, and valve marking
Complete Quality Control: Comprehensive inspection from raw material to finished product
| Parameter | Specification |
|---|---|
| Size Range | DN40 - DN1600 (larger sizes available) |
| Working Pressure | PN10 - PN16 |
| Operating Temperature | -40℃ to +150℃ |
| Coating Thickness | 0.5 - 1.2mm |
| Body Materials | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Disc Material | 316L Stainless Steel, Duplex Steel |
| Seat Materials | EPDM, FKM (Viton®) |
| End Connections | Wafer, Lug, Flange |
| Design Standards | EN 593, MSS SP67, API 609, BS5155 |
| Flange Standards | ANSI B16.1/B16.5, DIN 2501, EN 1092, ISO 2531, JIS B2210 |
| Face to Face | ISO 5752, EN 558, MSS SP67, API 609 |
| Top Flange | ISO 5211 |
Proven Performance: Backed by over 19 years of valve manufacturing experience and a successful track record in demanding projects, including collaborations with government institutions-2.
Supply Chain Integration: With production bases in Tianjin and Wenzhou, we offer seamless integration of water valve supply chains in the north and industrial valve supply chains in the south, ensuring cost-effective solutions and timely delivery.
Comprehensive Product Range: Beyond butterfly valves, we provide ball valves, gate valves, foot valves, strainers, check valves, control valves, and more, offering one-stop procurement for customers.
Global Reach: Committed to delivering quality valve solutions to customers worldwide, with a focus on reliability, performance, and value.
