Stop guessing on fitment. Get exact dimensional data (ISO, API, AWWA) for multi-vendor interchangeability — saving engineers up to 12 hours per valve selection.
For: Procurement Managers, Technical Directors & Valve Distributors in the USA, Middle East & Europe.
Get Free Dimensional Drawings & Quote in 24hIn the field, a 2 mm flange mismatch or a 5° disc angle deviation can cause:
The fix? Precision-engineered keystone butterfly valve dimensions that match or exceed OEM specs — backed by a factory with 10+ years of export experience.
Our lug and wafer-style butterfly valves are manufactured to API 609 and AWWA C504 standards, ensuring full interchangeability with Keystone, Bray, Emerson, and other major brands. No modification needed.
Face-to-face (F2F) tolerances within ±0.5 mm — same bolt circles, same disc profile.
From 50 mm to 1200 mm, with Class 150, 300, and PN10/16 pressure ratings.
WCB, CF8M, Duplex, and LCB — each heat tested with EN 10204 3.1 certs.
ISO 5211 top flange standard — direct bolt-on for pneumatic, electric, or gear operators.
For popular sizes (4″–12″), we ship from stock within 7 working days to the USA & EU.
Live-loaded stem packing meets ISO 15848-1 Class B — safe for media up to 260 °C.
| Size (inch) | DN (mm) | F2F (mm) Class 150 | F2F (mm) Class 300 | Bolt Circle (mm) | Disc Ø (mm) | ISO 5211 Top Flange | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 2″ | 50 | 43 | 52 | 120.7 | 48 | F07 | 3.5 |
| 4″ | 100 | 52 | 64 | 190.5 | 98 | F10 | 6.8 |
| 6″ | 150 | 56 | 70 | 241.3 | 146 | F10 | 11.2 |
| 8″ | 200 | 60 | 76 | 298.5 | 196 | F12 | 17.5 |
| 10″ | 250 | 65 | 83 | 362.0 | 245 | F12 | 26.0 |
| 12″ | 300 | 71 | 89 | 431.8 | 294 | F14 | 35.5 |
flanged butterfly valve dimensions lug style butterfly valve dimensions lug butterfly valve dimensions
Full dimensional drawings (DWG & PDF) available on request. Contact us for 14″–48″ or Class PN10/16.
✅ ISO 9001:2015 | ✅ CE (PED 2014/68/EU) | ✅ API 609 | ✅ AWWA C504 | ✅ RoHS & REACH | ✅ Fire-Safe (API 607) | ✅ NACE MR0175
“We replaced a Keystone 8″ valve with Thriveon’s version — same F2F, same bolt pattern. No rework, no delay. Saved us 34% on the unit cost.” — David M., Procurement Manager, Texas Refinery (USA)
“Thriveon provided dimensional certs within 24 hours. That level of transparency is rare for a Chinese factory. We now quote them for all our keystone butterfly valve dimensions requests.” — Ahmed S., Valve Distributor, Jeddah (Saudi Arabia)
Yes. Our valves are manufactured to API 609 and AWWA C504 standards, which means the face-to-face, bolt circle, and disc profile dimensions are identical to Keystone’s standard range. We also supply a dimensional report with every shipment for verification.
We cover 2″ to 48″ (DN50 to DN1200) in wafer and lug styles. For sizes 2″–12″, we keep stock for immediate shipment. Larger sizes (14″–48″) are made to order with 15–25 day lead time.
Absolutely. We provide free 2D (DWG, PDF) and 3D (STEP, IGES) dimensional drawings within 24 hours of request. This helps your engineering team validate fitment without any commitment.
Our direct-from-factory price is typically 30–50% lower than Keystone’s list price for the same specification. You get the same dimensional fit, same pressure rating, with full traceability — at a fraction of the cost. Shipping from China to the USA is $200–$600 for most orders.
We accept T/T (wire transfer), L/C at sight, and for qualified buyers, net 30 terms after credit check. Minimum order quantity (MOQ) is 1 piece for standard sizes; we welcome sample orders for testing.
Every valve is hydrostatically tested (shell & seat) and dimensional checked. Our ISO 9001 system controls material traceability, and we offer third-party inspection (SGS, BV) before shipment at your request.
If our keystone butterfly valve dimensions vary from the approved drawing by more than ±0.5 mm, we replace the valve at no cost — including freight. We also offer free samples for first-time buyers to validate fitment.
Standard air freight: 5–7 working days. Sea freight (LCL): 18–25 days to Los Angeles or Houston. We provide tracking and customs support for smooth clearance.
“We ordered 6″ and 8″ lug valves to replace Keystone units at a chemical plant. The bolt holes aligned perfectly with the existing actuators. No adapter plates needed. That’s a huge win for us.”
“Thriveon’s dimensional drawings are accurate within 0.3 mm. We uploaded their STEP file directly into our piping model — zero clashes. First article passed inspection first-time.”
“Pricing is transparent, and they actually answer technical questions. Compared to other Chinese suppliers, Thriveon’s documentation is on par with European manufacturers. We’ve placed 4 repeat orders this year.”
“We were skeptical about buying valves from China for a US Navy project. Thriveon provided full material certs, NACE compliance, and the dimensions matched our obsolete Keystone valves exactly. Audited and approved.”
“The sales engineer sent me a video measuring the F2F dimension on the production floor. That kind of transparency builds trust. Delivery was 8 days from order to LAX.”
Get your free dimensional sample kit (valve + drawing set) and see how Thriveon’s keystone butterfly valve dimensions fit your system perfectly. Limited to the first 15 requests this month.
Or email info@thriveonvalve.com — we respond in English within 4 hours.
* Your information is protected under our Privacy Policy. No spam, no cold calls.
Related Products
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 
