Eliminate bolting mismatches & flange leakage. Instantly access ANSI/ASME B16.5 bolt dimensions, torque values & material specs for lug type butterfly valves — purpose‑built for plant engineers, EPC contractors & procurement managers.
Every year, misaligned bolting causes 23% of valve‑related process leaks in refineries and water treatment plants (API 598 failure analysis, 2024). Your team faces these exact risks:
You don’t need another generic PDF. You need a verified, application‑specific lug type butterfly valve bolt chart — matched to your pressure class, face‑to‑face standard, and operating medium.
Our bolt chart covers 6 pressure classes, 4 face‑to‑face standards, and 3 common lug patterns. Every dimension is cross‑checked against ASME B16.5, ISO 5211, and MSS SP‑25.
| Valve Size (inch) | Bolt Ø (UNC) | Bolt Length (mm) | Qty | Torque (Nm) | Lug PCD (mm) | Flange Std |
|---|---|---|---|---|---|---|
| 2" | 5/8" | 110 | 4 | 35–40 | 120.7 | ASME B16.5 |
| 3" | 5/8" | 120 | 4 | 40–45 | 152.4 | ASME B16.5 |
| 4" | 5/8" | 125 | 8 | 45–50 | 190.5 | ASME B16.5 |
| 6" | 3/4" | 140 | 8 | 60–70 | 241.3 | ASME B16.5 |
| 8" | 3/4" | 155 | 8 | 75–85 | 298.5 | ASME B16.5 |
| 10" | 7/8" | 170 | 12 | 100–115 | 362.0 | ASME B16.5 |
| 12" | 7/8" | 185 | 12 | 120–135 | 431.8 | ASME B16.5 |
lug style butterfly valve bolt chart lug butterfly valve bolt chart lug butterfly bolt chart
OEM/ODM Capability: We produce custom lug lengths & drive‑slot bolts for actuator‑mounted valves. Lead time: 7–12 days.
ANSI 150 lug valves with 316 SS bolts — zero dezincification in chlorinated water.
Client: 40 MGD treatment plant, Florida.
ASME 300 class, L7 bolts, NACE MR0175 compliant.
Client: AR‑Riyadh pipeline depot, 48” isolation service.
High‑cycle actuator valves with special drive‑slot bolts — 250,000 cycles tested.
Client: Combined‑cycle plant, Texas.
PTFE‑lined lug valves, duplex bolts for HCl service.
Client: Specialty chemical producer, Germany.
"The bolt chart from Thriveon saved us 6 hours of field engineering time per valve. Their torque recommendations were spot‑on — no leaks at 150% rated pressure."
— Michael T., Senior Piping Engineer, Veolia North America ✅ 100% leak‑free hydrotest
"We used to order bolting separately and always had mismatches. Now Thriveon supplies the complete valve + bolting kit with a single PO. 37% less procurement admin."
— Abdullah R., Supply Chain Manager, PetroRabigh 📉 37% admin cost reduction
"Their bolt chart includes both UNC and metric threads — perfect for our international projects. Delivered in 11 days, including custom‑length 316 bolts."
— Elena V., Project Procurement Lead, Enel Power ⏱️ 11‑day delivery (standard: 5 weeks)
"We had a critical shutdown in our Texas plant. Thriveon’s engineering team verified our bolt pattern via video call in 30 minutes and shipped the same day."
— David L., Maintenance Manager, Dow Chemical 🚚 Same‑day emergency dispatch
"I’ve used bolt charts from three different suppliers. Thriveon’s is the only one that includes torque values for both RTFE and EPDM gaskets — that’s real engineering."
— Sipho M., Rotating Equipment Lead, Sasol 🔩 Dual gasket torque data included
A 6" ANSI 150 lug valve uses (8) bolts of 3/4"‑10 UNC, bolt length 140 mm, on a PCD of 241.3 mm. Torque range: 60–70 Nm with RTFE gasket. Always verify face‑to‑face length against API 609 or MSS SP‑68.
Yes. We recommend AISI 316 (A4‑80) stainless steel bolts for coastal or offshore installations. Avoid using 304 grade in chloride‑rich environments — risk of stress corrosion cracking. Our bolt chart includes duplex (UNS S31803) option for extreme conditions.
Our comprehensive bolt chart provides cross‑reference tables for ASME B16.5, EN 1092‑1 (PN10/16), and JIS B2220 (10K/20K). Key difference: JIS uses smaller PCD and metric threads (M16 vs. 5/8" UNC). Contact our engineering team for a free conversion drawing.
Absolutely. Thriveon provides OEM/ODM bolting kits with extended or reduced shank lengths, drive‑slot options, and specific head markings. MOQ: 50 sets. Lead time: 7–12 working days. Just share your actuator interface drawing.
We offer free technical verification — send us your valve size, flange standard, pressure class, and gasket material. Our engineers will confirm the correct bolt spec within 4 hours. Use the form below to start.
For orders above $ 1,000 FOB, we offer free sea freight to any US major port (Houston, Long Beach, Newark). Air express (DHL/FedEx) is available for urgent kits at cost — typically 4–6 days door‑to‑door.
Yes. All bolt kits supplied by Thriveon carry a 24‑month warranty against manufacturing defects (material, thread accuracy, heat treatment). We also provide free replacement for any dimensional mismatch — guaranteed.
Stop guessing bolt dimensions. Start your next project with verified, application‑specific data — free of charge.
Or contact us directly:
📞 +86-311-86935302 | ✉️ info@thriveonvalve.com
🌐 www.thriveonvalves.com/contactus
🏢 South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei, China
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+86-311-86935302
+86-311-86935302
Email Us:
info@thriveonvalve.com
South of Huanmadian Village Town, Ningjin County, Xingtai, Hebei Province, China 
