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CF Rotatable Bored Blank Flange Tapped Holes CF16-CF250 High Vacuum Fitting SS304 SS316L Stainless Steel Flanges 1/2"-10" Thru Holes/Metric Thread/UNC Thread
SS304 SS36L Rotatable Bored Blank Flange Tapped Holes Conflat High Vacuum Pipe Fitting Stainless Steel Flanges
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CF FLANGE SERIES
CF flanges are available with tapped or untapped holes. Tapped flanges are available in UNCUNf or metric threads. Tapped tlanges have through holes, so bolts may protrude slightly from the back of the flange when fastened to an untapped flange. Untapped Cf flanges can be fastened to each other with stainless steel bolts and hex nuts or plate nuts. Plate nuts center themselves over two adjacent holes and can be held in place with one finger while the bolts are tightened. They are avallable for most flange sizes from 1 1/3 to 10 inch (33.96-254mm) ODs. As an alternative to hex head bolts, 12-point bolts are available for CF flanges from 2 3/4 to 10 inch (33.96 to 354mm) ODs. Silver plated bolts eliminate the need for anti-seize compoundin clean room environments.
ASSEMBLY INSTRUCTIONS FOR CF FLANGES
1. Apply a small amount of high temperature anti-seize compound to the bolt threads
2. Check that both flange surfaces are clean and sealing edges are free from nicks and scratches.
3. Using clean, lint free gloves, unpack gasket.
4. Place gasket in the knife edge counterbore of nonrotatable flange.
5.Align the mating hole pattern and leak test grooves.
6. Install the proper bolts and tighten hand tight. Check to see that the flange faces are parallel.
7. Tighten the bolts 1/4 to 1/2 turns using a star pattern until the flange faces are metal to metal.
8. Torque the fasteners to the listed value using the same pattern.
* U.S. manufacturers of CF flanges name them according to their outer diameter measured in inches i.e. a CF600 flange has an outer diameter of approximately 6 inches.
* European identification for these flanges is expressed in a variety of ways; the flange outer diameter is measured in millimeters or the flange inner diameter counterbore (the area machined to accept tubing for welding)is measured in. millimeters or the inner diameter of the largest through bore is measured in millimeters. Measurements are rounded to the nearest millimeter for naming purposes.
* U.S. and Metric CF flanges are compatible. The only difference in design is that metric flanges have a metric bolt thread machined into tapped bolt holes. QiMing can provide both metric tapped flanges on request.
| U.S.Flange Size | DIN Standard | European Sizes | Flange Outer Dia | |
| Inch | Millimeter | |||
| CF133 | DN16 CF | CF16 | 1.33" | 33.8 |
| CF212 | CF25 | 2.12" | 53.8 | |
| CF275 | DN35 CF | CF35 | 2.75" | 70 |
| CF275 | CF40 | 2.75" | 85.7 | |
| CF338 | CF50 | 3.38" | 114.3 | |
| CF450 | DN63 CF | CF63 | 4.5" | 117.5 |
| CF462 | CF80 | 4.62" | 152.4 | |
| CF600 | DN100 CF | CF100 | 6" | 203.2 |
| CF675 | CF130 | 6.75" | 254 | |
| CF800 | DN150 CF | CF160 | 8" | 304 |
| CF1000 | DN200 CF | CF200 | 10" | 336.6 |
| CF1200 | DN250 CF | CF250 | 12 | 355.6 |
| CF1325 | CF270 | 13.25" | 419.1 | |
| CF1400 | DN300 CF | CF300 | 14" | 355.6 |
| CF1650 | DN350 CF | CF350 | 16.5" | 419.1 |
CF Bored Flange，Rotatable
*Material:SS304/SS316
*Tapped and Through Holes
Thru Holes
| Model for 304 | Size | A (Inch/mm) | B (Inch/mm) | C (Inch/mm) | D (Inch/mm) | Bolt Hole Dia (Inch/mm) | Bolt Hole No. | PCD | N.W. (g) |
|---|---|---|---|---|---|---|---|---|---|
| GWR01H1F160504 | CF16-1/2" | 1.33/33.8 | 0.505/12.83 | 0.505/12.83 | 0.37/7.6 | 0.172/4.4mm | 6 | 1.062/26.97 | |
| GWR01H1F160754 | CF16-3/4" | 1.33/33.8 | 0.755/19.2 | 0.63/16 | 0.37/7.6 | 0.172/4.4mm | 6 | 1.062/26.97 | |
| GWR01H1F251004 | CF25-1" | 2.12/53.8 | 1.01/25.65 | 0.875/22.1 | 0.47/11.9 | 0.265/6.7mm | 6 | 1.625/41.28 | |
| GWR01H1F350754 | CF35-3/4" | 2.75/70 | 0.755/19.2 | 0.63/16 | 0.5/12.7 | 0.265/6.7mm | 6 | 2.312/58.72 | |
| GWR01H1F351004 | CF35-1" | 2.75/70 | 1.01/25.65 | 0.875/22.1 | 0.5/12.7 | 0.265/6.7mm | 6 | 2.312/58.72 | |
| GWR01H1F351504 | CF35-1.5" | 2.75/70 | 1.51/38.35 | 1.375/34.9 | 0.5/12.7 | 0.265/6.7mm | 6 | 2.312/58.72 | |
| GWR01H1F501504 | CF50-1.5" | 3.38/85.7 | 1.51/38.35 | 1.375/34.9 | 0.62/15.75 | 0.332/8.43mm | 8 | 2.85/72.39 | |
| GWR01H1F502004 | CF50-2" | 3.38/85.7 | 2.01/51.05 | 1.875/47.63 | 0.62/15.75 | 0.332/8.43mm | 8 | 2.85/72.39 | |
| GWR01H1F632504 | CF63-2.5" | 4.5/114.3 | 2.51/63.75 | 2.375/60.33 | 0.68/17.4 | 0.332/8.43mm | 8 | 3.628/92.15 | |
| GWR01H1F802504 | CF80-2.5" | 4.62/117.5 | 2.51/63.75 | 2.375/60.33 | 0.75/19.1 | 0.332/8.43mm | 10 | 4.03/102.4 | |
| GWR01H1F803004 | CF80-3" | 4.62/117.5 | 3.01/76.45 | 2.875/73.02 | 0.75/19.1 | 0.332/8.43mm | 10 | 4.03/102.4 | |
| GWR01H1F1004004 | CF100-4" | 6/152.4 | 4.01/101.85 | 3.875/98.42 | 0.78/19.9 | 0.332/8.43mm | 16 | 5.128/130.25 | |
| GWR01H1F1606004 | CF160-6" | 8/203.2 | 6.02/152.9 | 5.835/148.2 | 0.88/22.3 | 0.332/8.43mm | 20 | 7.128/181.05 | |
| GWR01H1F2008004 | CF200-8" | 10/254 | 8.02/203.7 | 7.834/199 | 0.97/24.6 | 0.332/8.43mm | 24 | 9.128/231.85 | |
| GWR01H1F25010004 | CF250-10" | 12/304 | 10.03/254.5 | 9.75/247.65 | 1.12/28.45 | 0.332/8.43mm | 32 | 11.18/283.97 |
Metric Thread
| Model for 304 | Size | A (Inch/mm) | B (Inch/mm) | C (Inch/mm) | D (Inch/mm) | Metric Thread | Metric Thread No. | PCD | N.W. (g) |
|---|---|---|---|---|---|---|---|---|---|
| GWR01M1F160504 | CF16-1/2" | 1.33/33.8 | 0.505/12.83 | 0.505/12.83 | 0.37/7.6 | M4 | 6 | 1.062/26.97 | |
| GWR01M1F160754 | CF16-3/4" | 1.33/33.8 | 0.755/19.2 | 0.63/16 | 0.37/7.6 | M4 | 6 | 1.062/26.97 | |
| GWR01M1F251004 | CF25-1" | 2.12/53.8 | 1.01/25.65 | 0.875/22.1 | 0.47/11.9 | M6 | 6 | 1.625/41.28 | |
| GWR01M1F350754 | CF35-3/4" | 2.75/70 | 0.755/19.2 | 0.63/16 | 0.5/12.7 | M6 | 6 | 2.312/58.72 | |
| GWR01M1F351004 | CF35-1" | 2.75/70 | 1.01/25.65 | 0.875/22.1 | 0.5/12.7 | M6 | 6 | 2.312/58.72 | |
| GWR01M1F351504 | CF35-1.5" | 2.75/70 | 1.51/38.35 | 1.375/34.9 | 0.5/12.7 | M6 | 6 | 2.312/58.72 | |
| GWR01M1F501504 | CF50-1.5" | 3.38/85.7 | 1.51/38.35 | 1.375/34.9 | 0.62/15.75 | M8 | 8 | 2.85/72.39 | |
| GWR01M1F502004 | CF50-2" | 3.38/85.7 | 2.01/51.05 | 1.875/47.63 | 0.62/15.75 | M8 | 8 | 2.85/72.39 | |
| GWR01M1F632504 | CF63-2.5" | 4.5/114.3 | 2.51/63.75 | 2.375/60.33 | 0.68/17.4 | M8 | 8 | 3.628/92.15 | |
| GWR01M1F802504 | CF80-2.5" | 4.62/117.5 | 2.51/63.75 | 2.375/60.33 | 0.75/19.1 | M8 | 10 | 4.03/102.4 | |
| GWR01M1F803004 | CF80-3" | 4.62/117.5 | 3.01/76.45 | 2.875/73.02 | 0.75/19.1 | M8 | 10 | 4.03/102.4 | |
| GWR01M1F1004004 | CF100-4" | 6/152.4 | 4.01/101.85 | 3.875/98.42 | 0.78/19.9 | M8 | 16 | 5.128/130.25 | |
| GWR01M1F1606004 | CF160-6" | 8/203.2 | 6.02/152.9 | 5.835/148.2 | 0.88/22.3 | M8 | 20 | 7.128/181.05 | |
| GWR01M1F2008004 | CF200-8" | 10/254 | 8.02/203.7 | 7.834/199 | 0.97/24.6 | M8 | 24 | 9.128/231.85 | |
| GWR01M1F25010004 | CF250-10" | 12/304 | 10.03/254.5 | 9.75/247.65 | 1.12/28.45 | M8 | 32 | 11.18/283.97 |
UNC Thread
| Model for 304 | Size | A (Inch/mm) | B (Inch/mm) | C (Inch/mm) | D (Inch/mm) | UNC Thread | UNC Thread No. | PCD | N.W. (g) |
|---|---|---|---|---|---|---|---|---|---|
| GWR01T1F160504 | CF16-1/2" | 1.33/33.8 | 0.505/12.83 | 0.505/12.83 | 0.37/7.6 | 8-32 | 6 | 1.062/26.97 | |
| GWR01T1F160754 | CF16-3/4" | 1.33/33.8 | 0.755/19.2 | 0.63/16 | 0.37/7.6 | 8-32 | 6 | 1.062/26.97 | |
| GWR01T1F251004 | CF25-1" | 2.12/53.8 | 1.01/25.65 | 0.875/22.1 | 0.47/11.9 | 1/4-28 | 6 | 1.625/41.28 | |
| GWR01T1F350754 | CF35-3/4" | 2.75/70 | 0.755/19.2 | 0.63/16 | 0.5/12.7 | 1/4-28 | 6 | 2.312/58.72 | |
| GWR01T1F351004 | CF35-1" | 2.75/70 | 1.01/25.65 | 0.875/22.1 | 0.5/12.7 | 1/4-28 | 6 | 2.312/58.72 | |
| GWR01T1F351504 | CF35-1.5" | 2.75/70 | 1.51/38.35 | 1.375/34.9 | 0.5/12.7 | 1/4-28 | 6 | 2.312/58.72 | |
| GWR01T1F501504 | CF50-1.5" | 3.38/85.7 | 1.51/38.35 | 1.375/34.9 | 0.62/15.75 | 5/16-24 | 8 | 2.85/72.39 |
About Us
Wenzhou QiMing Stainless Co., Ltd. was founded in 2015, located in Wenzhou city providing a wide range of stainless steel valves and fittings for food, dairy, beverage,cosmetic, wine industries, semiconductor, LCD,solar energy, lithium technology, photovoltaic and other high-tech industries. mainly manufacture and export SS valves and fittings including Butterfly Valve, Ball Valve, Check Valve, Angle Valve, Vacuum Valves, Tri Clamp Fittings, Weld Fittings,KF/NW flanges, ISO Flanges and CF Flanges. has Mazak CNC, Milling CNC, handheld spectrometer,helium mass spectrometer leak detection, roughness tester and others. With more than 10 years development, QiMing gets 3A certificate and ISO9001:2008. QiMing's main market is Europen, USA, Korea,Japan and so on.
QiMing Market
Our products are exported to many countries, including South Korea, the United States, the United Kingdom, ltaly, France, the Netherlands, Finland, Russia, Belarus, Thailand, CanadaMexico,
Australia, Germany, Spain, Malaysia, Singapore, Vietnam, Indonesia, India, thePhilippines, Japan, Paraguay, Brazil, Chile, Peru, and more.
QiMing Team
Our experienced engineers work closely with each customer to find out the best possible solutions.Our constant technical innovation combined with stringent quality control systems hasenabled us to deliver high performance and outstanding value in sanitary applications.We are dedicated to improving the performance and value of our products, services, and solutions to meet your requirements
Equipment & Testing
QiMing has advanced CNC machieries,CNC centers and Testing Equipment,ISO9000 Certificated and all raw materials are traceablethe ablethe
Certificate
Exhibition
Wenzhou Qiming Stainless Steel Co., Ltd. participated in the Japan Semiconductor Exhibition in November 2023, the Shenzhen Semiconductor Exhibition in June 2024, and the U.S. Semiconductor Exhibition in July 2024. In December 2024, the company attended the Japan Semiconductor Exhibition again and participated in the China Optoelectronics Expo during the same period. It will take part in the China Optoelectronics Expo in September 2025, the U.S. Semiconductor Exhibition in October 2025, and the Japan Semiconductor Exhibition in November 2025.
FAQ
Q: Why would I choose you?
Wenzhou QiMing Stainless Co., Ltd has been engaging in manufacturing sanitary valves, fittings, tank components and pumps for over
15 years, outstanding in production capacity, effective management, accurate lead time, on-time shipments and problems-solving
rate after sales.
Q: May I have free samples before ordering?
Yes, our company is very pleased to send you free samples for quality test as long as freight cost being paid by buyers
themselves.
Q: What's the MOQ?
The majority of products are fully in stock, so we accept 1 piece as the minimum order quantity.
Q: Does your company have the export license?
Yes, we have more than 4 years export experience, we can do FOB, C&F, CIF, DDU and DDP (Russian Only).
Q: What's the payment term?
For small testing orders, we accept Paypal, Western Union, T/T and Credit Card.
For mass orders, we accept T/T and L/C.
Q: How would you minimize damages during delivery?
Standard: mass orders will be packed by many carbon boxes and filled in plywood cases.
Available requirement: blister packing for every piece of product, plastic caps for clamp connected products.
Q: How would you choose the shipment way?
Basically, we will select shipment ways based on four factors (order quantity, delivery time, costs and customs policy), then list
couples of reasonable options with Pros and Cons to customers, letting them to decide.
