CF Rotatable UHV Blank Flange

CF Rotatable UHV Blank Flange MKS logo Products MKS Newport Ophir Spectra-Physics Atotech ESI Capacitance Manometers Compact Pressure Transducers General Purpose Pressure Transducers High Performance Pressure Transducers Industrial Pressure Transducers Reference Pressure Transducers View All Capacitance Manometers Mass Flow Controllers & Meters Mass Flow Controllers Mass Flow Meters In Situ Flow Verifiers Flow Ratio Controllers Mass Flow Controller Accessories Vacuum Gauges Vacuum Pressure Transducers Vacuum Pressure Sensors Vacuum Gauge Controllers Vacuum Gauge Accessories Vacuum Gauge Calibration Legacy Vacuum Gauges Gas Analyzers Mass Spectrometers Tunable Filter Spectrometers FTIR Gas Analyzers NDIR Gas Analyzers Vacuum Flanges & Fittings ISO-KF Flanges & Fittings ISO-MF Flanges & Fittings CF Flanges & Fittings Butt Weld Flanges & Fittings Custom Vacuum Fabrication RF & Microwave Generators Microwave Generators RF Power Generators Pressure Controllers & Valves Pressure Controllers Vacuum Isolation Valves Downstream Exhaust Throttle Valves Upstream Flow Control Valves Gate Valves Plasma & Reactive Gas Solutions Remote Plasma Sources Ozone Generators & Systems Dissolved Gas Foreline Plasma Clean Systems Automation, Control & Sensing Heater Jackets & Traps Special Offers Virtual Booth Solutions Semiconductor Electronics and Packaging Specialty Industrial Support Global Service MKS Service Solutions RMA Request Form Health & Safety Forms Contact Global Service Technical Support Product Technical Support Training Programs Contact Product Technical Support Technical Resources Literature Manuals Technical Papers Application Notes Standards Compliance View All Technical Resources Contact MKS Company About MKS Guiding Principles Executives & Fellows Solutions & Innovations Legal Information Environmental, Social and Governance Investor Relations Corporate Governance Stock Information News Releases Events & Presentations Annual Meeting Materials SEC Filings and Forms Financial Analysts All Investor Relations News & Media Trade Shows & Events Press Releases Media Library Careers Job Openings We're Hiring! About MKS MKS Benefits Message from CEO Business Units & Products MY INNOVATION Stories Contact Contact Us Online Corporate Offices Sales & Application Support Calibration, Service & Repairs Product Technical Support Sign In Compare products Product Comparison 

Choose products to compare anywhere you see 'Add to Compare' or 'Compare' options displayed. Compare All Close Shopping cart items Shopping cart items Keyword search Search Submit search mks Search Submit search Products MKS Capacitance Manometers Compact Pressure Transducers General Purpose Pressure Transducers High Performance Pressure Transducers Industrial Pressure Transducers Reference Pressure Transducers View All Capacitance Manometers Mass Flow Controllers & Meters Mass Flow Controllers Mass Flow Meters In Situ Flow Verifiers Flow Ratio Controllers Mass Flow Controller Accessories Vacuum Gauges Vacuum Pressure Transducers Vacuum Pressure Sensors Vacuum Gauge Controllers Vacuum Gauge Accessories Vacuum Gauge Calibration Legacy Vacuum Gauges Gas Analyzers Mass Spectrometers Tunable Filter Spectrometers FTIR Gas Analyzers NDIR Gas Analyzers Vacuum Flanges & Fittings ISO-KF Flanges & Fittings ISO-MF Flanges & Fittings CF Flanges & Fittings Butt Weld Flanges & Fittings Custom Vacuum Fabrication RF & Microwave Generators Microwave Generators RF Power Generators Pressure Controllers & Valves Pressure Controllers Vacuum Isolation Valves Downstream Exhaust Throttle Valves Upstream Flow Control Valves Gate Valves Plasma & Reactive Gas Solutions Remote Plasma Sources Ozone Generators & Systems Dissolved Gas Foreline Plasma Clean Systems Automation, Control & Sensing Heater Jackets & Traps Special Offers Virtual Booth Newport Ophir Spectra-Physics Atotech ESI Solutions Semiconductor Electronics and Packaging Specialty Industrial Support Global Service Technical Support Technical Resources Contact MKS Company About MKS Investor Relations News & Media Careers Contact Contact Us Online Corporate Offices Sales & Application Support Calibration, Service & Repairs Product Technical Support Products Vacuum Flanges & Fittings CF UHV Flange Components and Fittings CF Ultra High Vacuum Flanges CF Rotatable Blank UHV Flanges Print CF Rotatable Blank Ultra High Vacuum Flanges CF Rotatable Blank Ultra High Vacuum Flanges Products Features Resources Contact Us Overview

These single-sided rotatable ultrahigh vacuum (UHV) blank CF flanges feature tapped or thru bolt holes and are joined to non-rotatable CF flanges. Rotatable CF flanges simplify alignment with the bolt holes of other system components and give infinitely rotatable joints. Blank flanges are used to close of unused CF ports.

Rotatable single-sided CF flange Blank to close off unused CF ports Tapped or thru flange bolt holes See All Features Products Show Filters:  View all products Compare Description Compatibility sortOrder rankScore ranking Drawings, CAD & Specs Flange Size Thickness Bolt Holes Number of Holes Availability Featured Item Price Brand 100881014
Loading... Quote Loading... Blank CF Flange, 1.33 in., Rotatable, Thru Bolt Holes Contact Us 100881014 Blank CF Flange, 1.33 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 1.33 in. 0.30 in. Thru Holes 6 Contact Us Loading... Quote Loading... 100881021
Loading... Quote Loading... Blank CF Flange, 1.33 in., Rotatable, 8-32 Tapped Holes Contact Us 100881021 Blank CF Flange, 1.33 in., Rotatable, 8-32 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 1.33 in. 0.30 in. Tapped 6 Contact Us Loading... Quote Loading... 100882010
Loading... Quote Loading... Blank CF Flange, 2.125 in., Rotatable, Thru Bolt Holes Contact Us 100882010 Blank CF Flange, 2.125 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 2.125 in. 0.5 in. Thru Holes 4 Contact Us Loading... Quote Loading... 100882015
Loading... Quote Loading... Blank CF Flange, 2.125 in., Rotatable, 1/4-28 Tapped Holes Contact Us 100882015 Blank CF Flange, 2.125 in., Rotatable, 1/4-28 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 2.125 in. 0.5 in. Tapped 4 Contact Us Loading... Quote Loading... 100883014
Loading... Quote Loading... Blank CF Flange, 2.75 in., Rotatable, Thru Bolt Holes Contact Us 100883014 Blank CF Flange, 2.75 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 2.75 in. 0.5 in. Thru Holes 6 Contact Us Loading... Quote Loading... 100883021
Loading... Quote Loading... Blank CF Flange, 2.75 in., Rotatable, 1/4-28 Tapped Holes Contact Us 100883021 Blank CF Flange, 2.75 in., Rotatable, 1/4-28 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 2.75 in. 0.5 in. Tapped 6 Contact Us Loading... Quote Loading... 100884006
Loading... Quote Loading... Blank CF Flange, 3.375 in., Rotatable, Thru Bolt Holes Contact Us 100884006 Blank CF Flange, 3.375 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 3.375 in. 0.69 in. Thru Holes 8 Contact Us Loading... Quote Loading... 100884009
Loading... Quote Loading... Blank CF Flange, 3.375 in., Rotatable, 5/16-24 Tapped Holes Contact Us 100884009 Blank CF Flange, 3.375 in., Rotatable, 5/16-24 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 3.375 in. 0.69 in. Tapped 8 Contact Us Loading... Quote Loading... 100885008
Loading... Quote Loading... Blank CF Flange, 4.5 in., Rotatable, Thru Bolt Holes Contact Us 100885008 Blank CF Flange, 4.5 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 4.5 in. 0.69 in. Thru Holes 8 Contact Us Loading... Quote Loading... 100885012
Loading... Quote Loading... Blank CF Flange, 4.5 in., Rotatable, 5/16-24 Tapped Holes Contact Us 100885012 Blank CF Flange, 4.5 in., Rotatable, 5/16-24 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 4.5 in. 0.69 in. Tapped 8 Contact Us Loading... Quote Loading... 100885504
Loading... Quote Loading... Blank CF Flange, 4.625 in., Rotatable, Thru Bolt Holes Contact Us 100885504 Blank CF Flange, 4.625 in., Rotatable, Thru Bolt Holes UNIVERSAL 0.0 1.0 0.0 0.0 4.625 in. 0.75 in. Thru Holes 10 Contact Us Loading... Quote Loading... 100885506
Loading... Quote Loading... Blank CF Flange, 4.625 in., Rotatable, 5/16-24 Tapped Holes Contact Us 100885506 Blank CF Flange, 4.625 in., Rotatable, 5/16-24 Tapped Holes UNIVERSAL 0.0 1.0 0.0 0.0 4.625 in. 0.75 in. Tapped 10 Contact Us Loading... Quote Loading... Show All cf-rotatable-blank-flanges - Drawings & CAD Additional CAD file downloads are not available for this product. CAD File Downloads: Loading... Download Close Close Close cf-rotatable-blank-flanges - Drawings Additional drawings are not available for this product. Close Close Specifications Component Type Blank-Off Flange Series Series 88 Flange Type CF Ultra High Vacuum Rotatable Flanges One Material 304 Stainless Steel Features Standard Flange for Ultra High Vacuum Applications Series 88 is a line of CF-style fittings that are the standard for ultra high vacuum applications. They use a flat gasket placed between two knife edges to provide a vacuum tight seal. Mating flanges have identical profiles, i.e., they are sexless, eliminating the need to store two types or worry about compatibility.

Made with very high purity stainless steel and meticulous cleaning procedures, Series 88 CF components are suitable for use in the ultra high vacuum applications to below 10-13 Torr and in temperatures from -196° to 500°C. The material characteristics of the flanges, seals, screws, and nuts are selected to provide high performance throughout a wide temperature range. Rotatable and nonrotatable flanges in sizes from mini 1-1/3 to 4-5/8 inches (34 to 117 mm) are available with several bore sizes to fit a range of tube diameters.

We use the latest automated equipment to provide the highest quality and consistency. Very high purity type 304 stainless steel is selected to have few inclusions. Combined with our surface treatment and cleaning procedures, this minimizes outgassing, permeability, and leakage. Proper hardness is maintained to prevent the knife edge from deteriorating.

Joining CF Flanges CF components are assembled by inserting a gasket between the two flange faces, then securing the assembly with bolts. (See Figure) Bolts should be tightened diagonally, versus sequentially around the circumference, for a secure vacuum seal. Assembly is cost effective through reuse of components and inch dimensional stubs, sockets, and tubes. The foolproof design provides leak tight joints consistently.

A variety of sealing hardware is available, such as plate nuts, dodecagon (12 point head) bolts, Viton® seals, and individually wrapped copper and silver-plated copper gaskets protected from corrosion and mechanical damage.

Plate nuts furnish the fastest, most convenient method to close flanges, reduce required clearance, assemble with one wrench, and are especially good in limited accessibility. Assembly time reduces greatly, because bolts are easier to start and tighten. The clearance needed is half that of regular nuts. They eliminate the need and cost for tapped flanges

MKS is one of very few CF manufacturers who offer silver plated bolts, including the convenient dodecagon (12 point head) style, which greatly reduce the risk of seizure or breakage.

CF flanges remain leak tight even after repeated cycling of the temperature over a wide range. The availability of both tapped and clearance bolt holes gives great flexibility.

The rotatable versions simplify alignment with the bolt holes of other system components and give infinitely rotatable joints. All fittings have at least one rotatable flange for easy alignment. Nonrotatable flanges provide better knife edge protection. The precise tolerances to which MKS fabricates its CF flanges insure an exact fit every time.

Standard size inch tubing provides easy and economical connection to the user’s equipment. Full and half nipples, adapters to a variety of other connection elements, tees, elbows, crosses, and flexible metal hoses for vibration isolation and movement give the line added versatility.

CF Flange Gasket Options Copper gaskets make these flanges self-centering and the standard leak grooves simplify troubleshooting and gasket removal. MKS guarantees its CF flanges and fittings to be leak free. OFHC copper gaskets are cleaned, insured to be scratch free, individually sealed, and ready for use. Individual packaging protects flange seal surfaces.

Silver-plated copper gaskets are available for systems that require frequent high-temperature bakeout. This prevents oxides from forming during the bakeout, which could contaminate the system.

The Viton CF gasket offered by MKS has a unique notching in the design, allowing less outgassing than most elastomer seals.

Flange Size Gasket OD Gasket ID Maximum Torque 1 1/3 inch 0.84 in. (21 mm) 0.64 in. (16 mm) 5 ft-lb 2 1/8 inch 1.29 in. (33 mm) 1.01 in. (26 mm) 16 ft-lb 2 3/4 inch 1.90 in. (48 mm) 1.45 in. (37 mm) 16 ft-lb 3 3/8 inch 2.43 in. (62 mm) 2.01 in. (51 mm) 26 ft-lb 4 1/2 inch 3.24 in. (82 mm) 2.51 in. (64 mm) 26 ft-lb 4 5/8 inch 3.60 in. (91 mm) 3.01 in. (76 mm) 26 ft-lb

Applications Series 88 CF flanges are suitable for applications requiring a very clean environment, ultra high vacuum conditions, high temperature, or where critical or dangerous materials must be contained or excluded. These include:

Difficult applications with corrosive, radioactive, toxic or air sensitive materials. Materials creation and processing such as molecular beam epitaxy. Analytical instrumentation including Auger electron spectrometers, mass spectrometers, and electron microscopes. High energy physics installation such as accelerators and fusion devices.

Resources Literature Series 88 CF UHV Components & Fittings (399.8 kB, PDF) cf-rotatable-blank-flanges Related Products CF Non-Rotatable Blank UHV Flanges CF Rotatable UHV Flanges Related Products CF Non-Rotatable Blank UHV Flanges CF Rotatable UHV Flanges Need help? Contact an Applications Specialist by sending us an email

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