Product Overview
The Lug-type Butterfly Valve is designed for isolation and flow control in industrial piping systems where maintenance flexibility and reliable shut-off performance are required.
Its lug-style body allows independent removal of downstream piping while the upstream line remains pressurized, making it suitable for systems requiring partial shutdown or sectional maintenance.
Target Applications: Water treatment plants, municipal engineering, oil and gas distribution, HVAC systems, power generation, and general industrial fluid handling.
Technical Specifications
|
Parameter |
Specification |
|
Size Range |
DN40 - DN600 (1.5" - 24") |
|
Pressure Rating |
PN1.6 - PN6.4 MPa (Class 150 - Class 300) |
|
Temperature Range |
-40°C to 350°C (-40°F to 662°F) |
|
Body Materials |
Cast Steel (WCB) / Stainless Steel (CF8, CF8M, 316) |
|
Seat Materials |
EPDM (Resilient) / PTFE (Teflon) / Metal-to-Metal (High-Temp) |
|
Design Standards |
API 609, ASME B16.34, EN 593 |
|
Flange Compatibility |
ANSI B16.5, EN 1092, JIS B2220 |
|
Applicable Media |
Water, oil, gas, weak acid and weak alkali fluids |
Quality Note: Every individual valve undergoes strict hydrostatic and pneumatic pressure testing according to API 598 standards before factory release, accompanied by an EN 10204 3.1 Material Test Report.
Engineering & Performance Advantages
Threaded lug holes allow secure single-flange installation and independent downstream pipeline maintenance under pressure without shutting down the entire system.
The design manages bidirectional pressure isolation up to PN6.4 MPa, with calibrated clearances for stable performance from -40°C to 350°C.
Every individual valve undergoes hydrostatic and pneumatic pressure testing according to API 598 standards before factory release.
Cast steel and stainless steel bodies undergo PMI testing, and all shipments include EN 10204 3.1 Material Test Reports for full traceability.
Actuation & Control Options
To meet diverse automation requirements in modern industrial plants, our lug butterfly valves can be configured with multiple actuation options:
Manual Operation: Ten-position detent lever / Heavy-duty worm gear operator.
Automated Control: Pneumatic actuators (Double-acting / Spring-return) / Electric actuators (ON-OFF or Modulating 4-20mA).
Accessories Available: Limit switch boxes, solenoid valves, and electro-pneumatic positioners.
Quality Assurance & Compliance Certificates
As an ISO 9001 certified manufacturer, Zhengmao Group ensures all industrial valves comply with global international standards. We provide complete quality assurance documentation to streamline your import and engineering approval processes:
• ISO 9001:2015 Quality Management System Certification
• CE / PED (Pressure Equipment Directive) compliance for the European market
• API 598 Pressure Testing Compliance Certification
• Third-party inspection reports (SGS, TUV, or Bureau Veritas) available upon request.
FAQ
Q: Can this lug-type butterfly valve be used for dead-end service?
A: Yes, our lug-style butterfly valves are specifically designed for dead-end service. The threaded lugs allow the downstream piping to be disconnected while keeping the upstream side under full working pressure.
Q: Do you provide customized face-to-face dimensions or special coatings?
A: Yes. We manufacture valves strictly to API 609 and EN 593 standards. For special industrial environments, we offer customized coatings (e.g., epoxy coating) and specific alloy materials upon request.
Q: What documentation is provided with the shipment?
A: Every shipment includes a complete documentation package: EN 10204 3.1 Material Test Certificate, Pressure Test Report (API 598), Commercial Invoice, Packing List, and Installation & Maintenance Manual.
Q: Do you offer samples for engineering verification?
A: Yes. We provide sample valves for dimension and pressure testing to ensure they meet your project specifications before bulk ordering.
Q: Can your valves be color-customized with our brand logo?
A: Yes. We support OEM services, including custom epoxy coating colors (RAL codes) and stainless steel nameplates with your brand logo.
Q: What is the standard lead time and how are the valves packaged for international shipping?
A: Standard lead time is 15-30 days depending on order volume. All valves are protected with plastic end caps, wrapped in shockproof material, and securely packed in export-standard seaworthy plywood cases to prevent damage during transit.
Q: What is the expected cycle life of your resilient seated butterfly valves?
A: Our optimized disc-seat design reduces friction, ensuring over 50,000 continuous trouble-free cycles under rated pressure.
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