Cost-effective Valves With Replaceable Liners For Easy Maintenance
Loose liner wafer butterfly valve offers efficient flow control and tight shut-off in pipelines, with replaceable liners for easy maintenance.
Cost-effective Valves With Replaceable Liners For Easy Maintenance
Loose liner wafer butterfly valve offers efficient flow control and tight shut-off in pipelines, with replaceable liners for easy maintenance. ideal for water, wastewater, and hvac systems, it ensures corrosion resistance and reliable performance up to 200 psi.
Loose Liner Wafer Butterfly Valve is a cost-effective flow control solution designed for reliable shut-off and regulation in industrial piping systems. Compliant with standards like API 609, ASME B16.34, and EN 558, these industrial butterfly valves are constructed from ductile iron (ASTM A536), stainless steel (AISI 316/304), or carbon steel (WCB), offering excellent corrosion resistant butterfly valve properties. Widely used in water treatment, wastewater management, HVAC, and general industrial applications, they provide efficient pipeline flow control under pressures up to 200 PSI and temperatures ranging from -30°C to 130°C, ensuring versatility and durability in diverse environments.
The loose liner wafer butterfly valve features a replaceable rubber liner, typically made of EPDM, NBR, or Viton, which serves as both a sealing element and a flange gasket, simplifying installation and maintenance. Available in sizes from 2" to 24" (DN50 to DN600), these valves support wafer-type connections per ASME B16.5 or EN 1092, fitting easily between flanges. The concentric disc design ensures low-pressure drop and smooth operation, while the resilient liner provides bubble-tight sealing, ideal for resilient seated butterfly valve applications. Surface treatments like 200 μm epoxy coating or polyurethane enhance corrosion resistance, making these valves suitable for neutral liquids like drinking water, wastewater, and HVAC fluids.
Loose Liner Wafer Butterfly Valves undergo rigorous testing, including hydrostatic, leakage, and low-pressure air tests, to comply with API 598 and EN 12266 standards. With a minimum tensile strength of 485 MPa and yield strength of 275 MPa for ductile iron, these valves ensure structural integrity in demanding conditions. The anti-blowout shaft and low-friction PTFE or bronze bearings reduce operating torque, enabling cost-effective actuation with levers, gearboxes, or pneumatic/electric actuators. The slim disc, made of stainless steel or epoxy-coated ductile iron, minimizes flow resistance, making it ideal for frequent operation in water distribution and HVAC systems.
Compared to lug or double-flanged butterfly valves, the loose liner wafer butterfly valve offers a lightweight, compact design with lower installation costs, making it ideal for above-ground applications where maintenance is straightforward. Certified by WRAS for potable water and API 609 for performance, these valves feature replaceable liners for quick maintenance, reducing downtime. Their robust construction resists corrosion and wear, extending service life in mildly corrosive environments. Specialized options, such as high-temperature EPDM or hydrocarbon-resistant NBR liners, cater to specific needs like wastewater aeration or chemical processing.
Addressing challenges like pipeline leaks, corrosion, and maintenance costs, Loose Liner Wafer Butterfly Valves deliver reliable, cost-effective solutions for industrial piping systems. Their corrosion-resistant materials, replaceable liners, and efficient design make them a preferred choice for engineers seeking durable resilient seated butterfly valves. Backed by Sunny Steel’s white-glove service, these valves ensure exceptional performance, safety, and longevity in water treatment, HVAC, and industrial applications.
High-quality butterfly valves suitable for water, oil, and gas applications, designed according to international standards.
Size: 2" and above
Pressure Rating: PN6-PN20, 200WOG, 150LB, JIS 5K/10K/20K
General applications: Water, Oil, Gas
Suitable for pure liquids/gases or medium containing solid powders
Design & Manufacture: API 609 (basic), ASME B16.34
F to F dimensions: API 609, ASME B16.10, BS EN 558
Connection: ASME B16.5, EN 1092, JIS 5K-20K, BW/RTJ
Safety: Anti-blow out stem
Body: ASTM A126, ASTM A536, ASTM A216 WCB
Disc: ASTM A536, ASTM A351 CF8/CF8M, Aluminium Bronze (C95400/C95500), DSS F51/F53/F55
Stem: SS304, SS316, DSS F51/F53/F55, XM-19, 17-4PH, Inconel 718, Monel K-500
Seat: EPDM, NBR, Viton
Operator: Lever & Gear Unit, other special materials available
Inspection: API598, API6D
100% chemical & mechanical tests per heat
100% DPT on castings; partial MT/UT, RT if required
100% hydraulic and low-pressure air tests
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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