Enhanced Corrosion Resistance And Low Torque For Industrial Flow Control
The nylon spray double offset butterfly valve offers superior corrosion resistance and reduced wear for reliable industrial flow control in water, oil, and gas systems.
Enhanced Corrosion Resistance And Low Torque For Industrial Flow Control
The nylon spray double offset butterfly valve offers superior corrosion resistance and reduced wear for reliable industrial flow control in water, oil, and gas systems.
Designed for reliable sealing performance in water, oil, and gas services. Internal and external nylon spray enhances durability and corrosion resistance.
Size: 48"
Rating: PN16
Material: ASTM A536 Ductile Iron
Coating: Nylon spray internal for enhanced protection
Material: ASTM A536 Ductile Iron
Surface: Nylon spray external for durability
Material: Stainless Steel 416 (SS416)
Provides strength and wear resistance
Seat: Stainless steel hard-faced
Seal: EPDM, ensuring reliable soft sealing performance
Standard: Gear unit
Other actuation methods available upon request
The Nylon Spray Double Offset Butterfly Valve is an advanced flow control solution engineered for harsh industrial applications, providing exceptional corrosion resistance and durability through its nylon spray coating on ductile iron components. This double offset butterfly design features an eccentric disc and stem offset, which reduces seat wear and friction during operation, ensuring bubble-tight sealing and extended service life in pipeline protection scenarios. Compliant with API 609 for design and ASME B16.34 for manufacturing, it excels in systems handling corrosive media, abrasive slurries, and high-pressure flows, making it a preferred choice for industrial flow control in refineries, chemical plants, and water treatment facilities.
Constructed with ASTM A536 ductile iron for the body and disc, both enhanced by internal and external nylon spray coatings, the valve resists pitting, erosion, and chemical degradation in environments exposed to water, oil, gas, and mild acids. The double offset mechanism—where the stem is positioned behind the disc and offset from the centerline—allows the disc to cam away from the seat upon opening, reducing torque by up to 50% compared to concentric designs and minimizing maintenance in corrosion resistant valve applications. Available in sizes from 2" to 144" (DN50 to DN3600), it supports pressure ratings of 150LB, PN6 to PN20, and JIS 5K-20K, with face-to-face dimensions per API 609, ASME B16.10, and BS EN 558 for seamless integration into existing pipelines.
The nylon spray valve incorporates a robust stainless steel stem (options including SS304, SS316, or 17-4PH) with an anti-blowout design for safety, and a hard-faced stainless steel seat paired with resilient seals like EPDM, NBR, or Viton for bi-directional zero-leakage performance. Rigorous testing per API 598 and API 6D, including hydrostatic, low-pressure air, and nondestructive evaluations (DPT, MT, UT), guarantees reliability under cyclic loading and thermal stress. Its nylon coating, often Nylon 11 or equivalent, provides a self-lubricating surface that enhances industrial flow control efficiency by lowering fluid resistance and preventing biofouling in marine or wastewater systems. Customizable end connections—wafer, lug, flanged, or butt-weld—facilitate easy installation and removal without disrupting pipeline protection.
In comparison to single offset or zero offset valves, the double offset butterfly offers superior pressure handling (up to Class 150) and temperature tolerance (-20°C to 150°C for standard models, extendable with custom materials), making it ideal for high-vibration and corrosive settings like offshore platforms or power generation. The nylon spray not only boosts corrosion resistance against chlorides and sulfides but also reduces operational costs by extending intervals between inspections—up to three times longer than uncoated alternatives. Actuation options include manual levers, gear operators, pneumatic, or electric actuators per ISO 5211 mounting, enabling automation in HVAC, fire protection, and pneumatic conveying systems.
Addressing challenges such as premature seat wear, leakage in corrosive fluids, and high maintenance in industrial flow control, this eccentric butterfly valve delivers sustainable performance with a 12-18 month warranty and optional cryogenic treatments for LNG applications. Its lightweight yet robust construction (up to 40% lighter than gate valves) supports space-constrained installations while maintaining tensile strengths over 415 MPa. For enhanced pipeline protection, additional coatings like epoxy or 3LPE can be applied, ensuring compliance with NSF 61 for potable water or ABS for marine use. Overall, the Nylon Spray Double Offset Butterfly Valve stands as a cost-effective, reliable solution for global industrial operations demanding durability and efficiency.
Engineered to meet diverse industrial needs with robust materials and versatile designs.
| 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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