Definitive Lug Butterfly Bolt Chart – Eliminate Mismatch, Reduce Downtime
Stop guessing bolt patterns for your lug butterfly valves. Our precision bolt chart (ANSI/ASME) ensures exact fit every time – saving hours of rework and thousands in emergency replacements. Trusted by 200+ industrial plants in North America.
Get Free Bolt Chart PDF & Quote in 24h
The Hidden Cost of Incorrect Lug Butterfly Bolts
⏱ 37% longer installation time
When bolts don’t match the lug pattern, crews waste hours adjusting or sourcing replacements. A typical retrofit delays production by 2-3 shifts.
💸 $4,200 average emergency order
Rush shipping for wrong-sized bolts can cost 5x the standard price. One mismatch can erase your quarterly savings on valve procurement.
🔄 12% valve failure due to uneven bolting
Improper bolt length or diameter leads to flange distortion, leakage, and premature valve replacement – especially in high-torque applications.
📉 Confusing charts & outdated specs
Bolts from different manufacturers follow varying tolerances. Without a reliable lug butterfly bolt chart, engineers waste hours cross-referencing.
Thriveon’s Lug Butterfly Bolt Chart – Your One-Stop Reference
As a leading northern Chinese valve factory with 10+ years of engineering experience, we’ve standardized lug type butterfly valve bolt dimensions across our entire range. Our chart covers:
🔧 Complete Coverage
ANSI Class 150, 300, 600 and PN10/16 – for sizes 2″ to 48″. Every bolt hole pattern, thread size, and bolt length documented.
⚙️ Custom OEM/ODM
Need a non‑standard pattern? Our engineers recreate your exact bolt chart within 48 hours. “We modified 6″ lug patterns for a Saudi desalination plant – zero rework.”
🚀 High‑Speed Delivery
Stock bolts ship within 24h. For custom orders, we produce and deliver to US ports in 25 days – 40% faster than industry average.
✅ ISO 9001 & CE Compliance
All bolts meet ASTM A193/A194 grade B7, B8M, and 304/316 stainless. Full material traceability included.
Technical Specifications – Lug Butterfly Valve Bolt Pattern (Excerpt)
| Valve Size (inch) |
Class |
Number of Bolts |
Bolt Hole Diameter (in) |
Bolt Diameter (UNC) |
Bolt Length (in) |
Flange OD (in) |
| 2″ | 150 | 4 | 0.75 | 5/8″ | 3.5 | 4.5 |
| 3″ | 150 | 4 | 0.75 | 5/8″ | 3.75 | 5.0 |
| 4″ | 150 | 8 | 0.75 | 5/8″ | 4.0 | 6.0 |
| 6″ | 150 | 8 | 0.88 | 3/4″ | 4.5 | 7.5 |
| 8″ | 150 | 8 | 0.88 | 3/4″ | 5.0 | 9.0 |
| 10″ | 150 | 12 | 1.0 | 7/8″ | 5.5 | 11.0 |
| 12″ | 150 | 12 | 1.0 | 7/8″ | 6.0 | 13.0 |
| 14″ | 150 | 12 | 1.12 | 1″ | 6.5 | 15.25 |
lug butterfly valve bolt chart lug style butterfly valve bolt chart lug type butterfly valve bolt chart
Complete chart for all sizes and classes (including 300 & 600) available in our free technical brochure.
Real‑World Application: Water Treatment Plant, Texas
A municipal plant replaced 32 lug butterfly valves. Using Thriveon’s lug butterfly bolt chart, the contractor pre‑ordered bolts, trimmed installation time by 28%, and saved $11,600 in emergency procurement costs. The plant now stocks Thriveon bolts for all future replacements.
Trusted by Industry Leaders
✔ 5,000+ valves shipped monthly ✔ 98% on‑time delivery to USA ✔ 12‑year average engineer experience
We supply to major OEMs and EPCs including Mid‑West Oil & Gas, Pacific Water Solutions, Gulf Coast Petrochemical – satisfied with our bolt standardization program.
Certifications: ISO 9001:2015 | CE (PED 2014/68/EU) | API 609 available | Lloyd’s for marine applications
Customer Testimonials
“The Thriveon lug butterfly bolt chart saved us from a total shutdown. Their bolt lengths matched our old Klostermeyer valves perfectly – no rework. We’ve reduced bolt inventory by 60%.”
Mike T. – Procurement Manager, City Waterworks (California)
“32 valves retrofitted in one week – zero bolt issues.”
“We needed custom 20″ ANSI 300 bolts for a chemical plant expansion. Thriveon delivered the exact pattern within 30 days. Their chart included torque specs – excellent documentation.”
Linda R. – Senior Piping Engineer, GulfChem Engineering
“Saved 2 weeks of engineering rework.”
“As a distributor, I rely on Thriveon’s bolt chart for quoting. It’s accurate across their whole butterfly valve range. My clients trust the data, and I’ve reduced returns by 90%.”
David L. – VP Supply Chain, Industrial Flow Supplies (Florida)
“Standardized on Thriveon for all lug valves.”
Frequently Asked Questions About Lug Butterfly Bolt Charts
What is a lug butterfly bolt chart?
A lug butterfly bolt chart is a technical reference table listing the number of bolts, hole diameters, bolt sizes (UNC/UNF), lengths, and flange dimensions for lug‑type butterfly valves per ASME/ANSI or PN standards. It ensures correct bolting for safe, leak‑free installation.
How do I know which bolt chart applies to my valve?
Check the valve’s pressure class (Class 150/300/600) and size. Thriveon provides charts for all standard classes. For non‑standard valves, send us the flange OD, bolt circle, and hole count – we’ll match the correct chart within 24 hours.
Can I get bolts pre‑cut to the exact length from your chart?
Yes. We supply bolts cut to the lengths shown on our chart (or your specified length). We also offer stud bolts with nuts and washers (ASTM A193 B7 / A194 2H). Minimum order 50 sets.
Do you provide a bolt chart for different materials (stainless, alloy)?
Absolutely. Our chart covers carbon steel, stainless 304/316, and alloy steel. Material grade is listed next to each bolt size. For special coatings (Zinc, Xylan, PTFE), please specify.
How does your bolt chart compare to other manufacturers (e.g., Bray, Keystone)?
Thriveon’s chart is cross‑referenced to major OEM patterns. If you have an existing valve from Bray, Keystone, or Dezurik, we can generate a conversion chart. Many of our customers use Thriveon bolts as a drop‑in replacement for those brands at 30‑40% lower cost.
What is the typical lead time and shipping cost to the USA?
Stock bolts: shipped within 24 hours. Custom orders (including chart verification): 15‑25 days FOB Tianjin or CIF US ports. Sea freight averages $0.60‑1.20/kg. We can consolidate bolts with valve orders to reduce shipping cost.
Can I get a free sample of the bolts to test fit before bulk order?
Yes. We offer free sample sets for all standard sizes (up to 10 bolts). You just pay shipping. For custom dimensions, a nominal sample fee is charged but deducted from your first order.
Stop Bolt Mismatch Forever – Get Your Free Lug Butterfly Bolt Chart
Request your comprehensive PDF chart (ANSI 150‑600, PN10‑16) plus a no‑obligation quote for bolts matched exactly to your valves.
Limited Offer: First 50 inquiries receive a set of sample bolts (up to 10 pieces) free of charge.
100% risk‑free. We stand behind every bolt with a 30‑day money‑back guarantee for incorrect fitment.
Or email us: info@thriveonvalve.com
What Our Clients Say About Our Bolt Solution
“We switched to Thriveon after a bolt failure cost us $18k. Their chart is spot‑on, and their customer service is amazing. They even helped us retro‑fit old Japanese valves.”
John M. – Maintenance Manager, NorCal Refinery
“No more emergency orders – we stock Thriveon bolts now.”
“For a guy like me who buys valves for ten different brands, Thriveon’s bolt chart is a godsend. I use it daily for quoting. It just works.”
Rebecca K. – Purchasing Specialist, Global Parts Supply (Texas)
“Reduced my bolt research time by 70%.”
James Harding – Senior Flow Control Engineer, Thriveon Valve
James has 15 years in industrial valve design and global sourcing. He spent 5 years at a Tier-1 OEM in Houston before joining Thriveon to bridge the quality‑cost gap for North American buyers. He personally audits every bolt chart for dimensional accuracy.
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 
