Lug Style Butterfly Valve Bolt Chart

Name: Lug Style Butterfly Valve Bolt Chart
Brand: Types Of Industrial Valves Casting Supplier Manufacturer in China | THRIVEON Valve
Availability: InStock
Rating: 4.8 (97 reviews)

Lug Style Butterfly Valve Bolt Chart: Sizing Guide for OEM & Replacement Orders

Eliminate bolt mismatches, reduce installation downtime, and standardize your valve procurement with a complete dimensional reference for lug-style butterfly valves — trusted by 400+ industrial buyers across the US, Saudi Arabia, and South Africa.

Get Free Bolt Chart PDF & Quote in 24 h → Download Technical Spec Sheet

✅ ISO 9001 • CE • RoHS • 12+ years of valve engineering

Lug style butterfly valve bolt chart reference – Thriveon Valve factory floor

⚠️ 3 out of 5 Valve Installations Are Delayed by Incorrect Bolting

As a procurement or engineering manager, you have likely faced these costly headaches:

Bolt length mismatch – a 2 mm error can lead to cross‑threading, flange leaks, and weekend call‑outs that cost $1,200+ per event.
Confusing standards – ASME B16.5, EN 1092, JIS B2220… each one specifies different bolt diameters and drilling patterns. Using the wrong reference = scrapped gaskets and lost hours.
Supplier guesswork – 34 % of buyers say they receive bolt charts that don’t match the actual valve flange (2025 Industrial Valve Survey). You need one reliable source of truth.
Installation rework – a misaligned lug valve can cause uneven gasket compression, leading to fugitive emissions and OSHA compliance risks.
Shipping delays – ordering the wrong stud bolts adds 3–5 days to project timelines, eroding your margin.
Inventory bloat – without a standardized bolt chart, your warehouse stocks redundant sizes, tying up working capital.

👉 Every minute spent cross‑checking bolt dimensions is time you could be closing the next order. Let our engineers send you the exact chart.

⛽ Lug Style Butterfly Valve Bolt Chart – ASME B16.5 & Full Dimensional Reference

Thriveon Valve’s bolt chart covers 2″ through 24″ lug-style butterfly valves, including bolt circle diameter, number of bolt holes, bolt size, and recommended stud bolt length. Every dimension is verified against ASME B16.5 Class 150 and Class 300 standards.

Table 1: Lug‑Style Butterfly Valve Bolt Chart – ASME B16.5 Class 150
Valve Size (inch)	Bolt Circle Ø (mm)	No. of Holes	Bolt Size (UNC)	Stud Bolt Length (mm)	Flange Ø (mm)
2″	120.7	4	5/8″	110	152.4
2½″	139.7	4	5/8″	120	177.8
3″	152.4	4	5/8″	125	190.5
4″	190.5	8	5/8″	130	228.6
6″	241.3	8	3/4″	150	279.4
8″	298.5	8	3/4″	165	342.9
10″	361.9	12	7/8″	180	406.4
12″	431.8	12	7/8″	200	482.6
14″	476.3	12	1″	215	533.4
16″	539.8	16	1″	235	596.9
18″	577.9	16	1⅛″	250	635.0
20″	635.0	20	1⅛″	270	698.5
24″	749.3	20	1¼″	300	812.8

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Key Engineering Specifications

Pressure rating: Class 150 (up to 285 psi) & Class 300 (up to 740 psi) – suitable for water, oil, gas, and steam.
Face‑to‑face dimensions: API 609 Table 1 & ISO 5752 short pattern – ensures direct interchangeability with major brands.
Body material: Ductile iron GGG40 / WCB carbon steel / CF8M stainless steel – each verified for lug strength.
Bolt material: Recommended A193 B7 stud bolts with 2H heavy hex nuts (also available in 304/316).
Gasket compatibility: Standard RF (raised face) 0.06″ finish – works with spiral wound, PTFE, and graphite gaskets.
Testing: 100 % hydrostatic shell test at 1.5× Pmax and pneumatic seat test in accordance with API 598.

👉 Need a custom bolt‑chart for Class 300 or a non‑standard flange? Our engineers can adapt within 48 h.

❓ Frequently Asked Questions – Lug Style Butterfly Valve Bolt Chart

What is a lug style butterfly valve bolt chart?

A lug style butterfly valve bolt chart lists the bolt circle diameter, number of bolt holes, bolt size, and recommended stud bolt length for each valve size. It helps procurement teams and installers order the correct fasteners without measuring the valve flange manually.

How do I know which bolt size I need for my lug valve?

Refer to ASME B16.5 Class 150 or Class 300 tables. For example, a 6″ lug valve requires 8 bolts of 3/4″ UNC x 150 mm long. Thriveon can provide a printable chart tailored to your valve series – just ask.

Can I use the same bolts for Class 150 and Class 300?

No. Class 300 flanges have a larger bolt‑circle diameter and require thicker bolts (e.g., 6″ Class 300 uses 7/8″ bolts vs. 3/4″ for Class 150). Always match the bolt chart to your pressure class to avoid joint failure.

Do you offer custom bolt configurations?

Yes. We can adapt the bolt pattern for EN 1092 PN10/PN16, JIS B2220, or customer‑specific drilling. Our engineers will verify the PCD and provide a certified drawing within 24 h.

What is the lead time for lug valves with the correct bolting?

Standard sizes 2″–12″ ship in 7–15 days, including complete stud‑bolt sets. Larger sizes (14″–24″) require 20–30 days. Express shipping via air freight is available for urgent orders.

How do I request a free bolt‑chart PDF?

Click the “Get Free Quote” button or email info@thriveonvalve.com with your valve size and pressure class. We will respond within 24 hours with a downloadable chart and a quotation.

Do you provide OEM valve bolt kits?

Absolutely. We supply A193 B7, 304SS, or 316SS stud bolts with nuts and washers – pre‑assembled and tagged per valve size. Just give us the bolt chart specs or send us your existing fasteners for a match.

1.5 Butterfly Valve

🌟 Real Reviews from Industrial Customers

“We ordered 12 pcs of 8″ lug valves with the bolt chart spec provided by Thriveon. Every single stud fit perfectly – no rework, no waste. Exactly the kind of reliability we need for our wastewater treatment plant.”

— James H., Plant Manager, Texas Waterworks

“Thriveon’s bolt chart saved me from a 3‑week delay on a skid project. The bolt‑circle dimensions matched our flange hubs 100 %. I have already put them on our approved vendor list.”

— Faisal A., Mechanical Engineer, Saudi Aramco Contractor

“Our previous supplier sent wrong bolt lengths twice. Thriveon sent a CAD‑verified chart with the quotation. Valves arrived with the correct stud sets. No more weekend call‑outs.”

— Thabo M., Maintenance Manager, Durban Chemical Processing

“We use Thriveon’s lug valves for OEM skids. Their bolt chart is fully interchangeable with our Italian‑made flanges. That consistency alone saves us 2 hours of inspection per unit.”

— Luigi C., Procurement Engineer, Milan Valve Systems

“I’ve been in valve procurement for 15 years – Thriveon is the first Chinese supplier to send a bolt chart that actually aligns with ASME B16.5 down to the decimal. Impressive quality control.”

— Susan D., Supply Chain Director, Texas Oil & Gas