Are you tired of lug butterfly valves that don’t fit your flanges, causing costly rework and downtime? Our valves are manufactured to exact ASME B16.10 and API 609 dimensions, verified by 100% QC inspection.
Get Free Quote & Dimensional Drawings in 24hAs a procurement or technical manager, you’ve likely faced these frustrations:
Short or long dimensions that don’t match your existing piping layout. A 2" difference can stop an entire line – costing up to $5,000/hour in downtime.
Lug holes that don’t align with ANSI or DIN flanges, requiring field drilling or adapter rings. Last year, 23% of our new clients reported this issue with previous suppliers.
Heavy cast iron valves with oversized packaging inflate freight by 30-40%. Combined with high import duties (up to 25% for some categories), you overpay before installation.
Cheap ductile iron or thin disc edges crack under thermal cycling. In 2025, one major US water treatment plant lost $120,000 due to valve failures from an Asian supplier.
| Size (inch) | Face-to-Face (mm) | Disc Diameter (mm) | Bolt Circle (mm) – ANSI 150 | Number of Holes | Pressure Rating |
|---|---|---|---|---|---|
| 2" (DN50) | 43 | 52 | 120.7 | 4 | 200 psi |
| 4" (DN100) | 52 | 105 | 190.5 | 8 | 200 psi |
| 6" (DN150) | 56 | 155 | 241.3 | 8 | 200 psi |
| 8" (DN200) | 60 | 204 | 298.5 | 8 | 200 psi |
| 10" (DN250) | 68 | 255 | 362.0 | 12 | 150 psi |
| 12" (DN300) | 78 | 305 | 431.8 | 12 | 150 psi |
lug style butterfly valve dimensions lug type butterfly valve dimensions lug type butterfly valve bolt dimensions
Note: All dimensions comply with ASME B16.10. Custom dimensions (PN10, PN16, JIS) available. Request full catalog.
“Thriveon’s dimensional accuracy saved us 3 days of installation per valve. Their face-to-face lengths are exactly ±0.5mm – we didn’t need any shims.”
– Daniel R., Plant Engineer, Texas Water Authority
“After switching to Thriveon, our valve failure rate dropped from 4% to 0.2%. The material test reports give us confidence for critical ammonia lines.”
– Sarah L., Procurement Manager, Midwest Chemical
ISO 9001:2015 CE (Pressure Equipment Directive) RoHS API 609 ASME B16.10 SGS Audited Factory
Standard dimensions follow ASME B16.10 for face-to-face lengths and ASME B16.5 for flange drilling. For common sizes (2"-12"), see the table above. For PN or JIS standards, we offer full interchangeability – just specify your flange standard.
Yes. We have CNC machining centers that drill and tap any circle diameter. Minimum order for custom patterns is 20 pieces. Lead time adds 3–5 days. Contact our engineering team for feasibility.
For a lug valve, measure the distance between the two flange sealing faces when the valve is fully closed. Use a caliper or depth gauge. We provide a step-by-step guide with your quotation.
Our 6" lug valve (ductile iron) weighs approximately 18 kg (40 lbs). Including packaging, it’s about 22 kg. Lighter than gray iron alternatives – reduces sea freight costs.
We accept T/T, L/C, and small orders via PayPal. Minimum order: 1 piece for stock sizes. Shipping: FOB Tianjin, CIF to major US ports (Seattle, LA, Houston) via express or sea freight. Lead time 7–30 days.
Absolutely. We share 2D DXF and 3D STEP files upon request. Our sales engineer will verify your piping dimensions and recommend the exact model.
Every valve is inspected with a CMM (coordinate measuring machine) for critical dimensions. A dimensional report is provided with each shipment. We also offer third-party inspection (SGS/Bureau Veritas) at your cost.
Yes, we provide free samples for standard sizes (2"-6"). You only pay shipping. This allows you to verify dimensions and performance on-site before bulk orders.
Limited-time offer: Free dimensional verification and matching report for the first 20 inquiries this month.
Plus: Request a free sample (2"-6") and test our precision risk-free. 100% money-back if dimensions don’t match your flanges.
Call: +86-311-86935302 | South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei, China
John M. – Mechanical Contractor, Florida
★★★☆☆
"Ordered 50 pcs of 4" lug butterfly valves for an HVAC retrofit. The dimensions were spot-on – all bolt holes aligned with existing ANSI flanges. Saved us 2 full days of installation labor. Will definitely reorder."
Emily K. – Procurement Lead, Pacific Chemicals
★★★★☆
"Thriveon provided dimensional drawings within 12 hours. The valves arrived with a full QC report. Only minor issue: one valve had a slight scratch, but their after-sales team shipped a replacement immediately. Good service."
Carlos R. – Plant Manager, Texas Water Utility
★★★★★
"We switched from a well-known US brand to Thriveon due to price. Honestly, I was skeptical about Chinese dimensions. But after testing 20 valves with digital calipers, every dimension was within tolerance. 30% cost cut without quality loss."
Michael T. – Engineering Director, NY Construction
★★★★★
"The custom lug hole pattern for a JIS 10K flange was perfect. They even added an extra tapped hole for our pressure sensor. Engineering support was outstanding."
Priya S. – Supply Chain Manager, Midwest Industrial
★★★★☆
"We needed expedited shipping to meet a project deadline. Thriveon air-freighted 10" valves in 5 days. Dimensional specs matched the data sheet exactly. I appreciate the transparency on shipping costs."
David Li – Senior Valve Engineer & Technical Writer
With over 15 years in valve manufacturing and international trade, David has helped 200+ clients in North America and Europe select the right valve dimensions for critical applications. He leads Thriveon’s engineering team and oversees dimensional QC. David holds a B.S. in Mechanical Engineering from Hebei University of Technology and is a member of the China Valve Association.
This article is based on real project experience and thousands of successful shipments. For direct technical inquiries, reach David at info@thriveonvalve.com.
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Call us on:
+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
