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ASA HV Flanges – Rotatable Grooved

ASA HV Flanges–Rotatable Flat

Introduction

ASA HV Flanges – Rotatable Flat are precision vacuum components designed for high-vacuum (HV) systems where easy alignment, reliable sealing, and mechanical flexibility are required. The rotatable design simplifies installation and system assembly, especially in complex vacuum layouts where bolt-hole alignment can be challenging.

Detailed Description

ASA rotatable flat flanges consist of a flat sealing face combined with a freely rotating outer ring. This construction allows the flange to be aligned and bolted without rotating the connected vacuum component, reducing installation stress and minimizing the risk of seal damage.

Manufactured from vacuum-grade stainless steel (typically 304 or 316L), these flanges offer excellent corrosion resistance, mechanical strength, and low outgassing. The flat face sealing geometry is compatible with standard ASA gaskets, providing consistent and repeatable vacuum performance in HV environments.

Key design advantages include:

  • Rotatable outer ring for easy bolt alignment

  • Flat sealing face for stable gasket compression

  • Smooth machined surfaces to reduce particle generation

  • Robust construction suitable for repeated assembly cycles

Applications

  • High-vacuum piping and chamber connections

  • Thin film deposition systems (PVD, sputtering, evaporation)

  • Semiconductor process equipment and R&D tools

  • Analytical instruments and vacuum test systems

  • Industrial HV vacuum lines and manifolds

Technical Parameters

ParameterTypical Value / RangeImportance
MaterialStainless Steel 304 / 316LStrength, corrosion resistance
Flange TypeASA HV, rotatable flatEasy installation & alignment
Sealing MethodFlat gasket sealReliable HV performance
SizesStandard ASA sizes (custom available)System compatibility
Surface FinishMachined / optional electropolishCleanliness & outgassing control
Vacuum RangeUp to ~10⁻⁷ mbar (typical)Suitable for HV systems

Comparison with Related ASA Flanges

Flange TypeKey AdvantageTypical Application
ASA Rotatable FlatEasy alignment, reduced stressComplex HV assemblies
ASA Non-Rotatable FlatRigid, simple constructionFixed layouts
ASA Grooved FlangeImproved gasket positioningRepetitive installations

FAQ

QuestionAnswer
What is the benefit of a rotatable flange?It allows bolt alignment without rotating the connected component.
Is this flange suitable for UHV?It is mainly intended for HV; CF flanges are recommended for UHV.
Are gaskets included?Gaskets are typically supplied separately unless requested.
Can sizes be customized?Yes, custom ASA sizes and finishes are available.
How are the flanges cleaned?Cleaned for vacuum service and packed to prevent contamination.

Packaging

Our ASA HV Flanges – Rotatable Flat are carefully cleaned, capped on sealing faces, and individually packed. Protective foam and export-grade cartons or wooden crates are used to ensure safe transportation and maintained surface quality.

Conclusion

ASA HV Flanges – Rotatable Flat provide a practical and reliable solution for high-vacuum connections where alignment flexibility and sealing consistency are critical. Their robust stainless steel construction and installer-friendly design make them a preferred choice for both laboratory and industrial vacuum systems.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.

Ordering Table

Flange Size/OD Type Flange Material Drawing Bore Bolt Hole Dia. # of Bolt Holes Note Dim A Dim B Dim C Dim D Dim E Dim F Part Number
ASA 6 (11.00" OD) Rotatable Flat 304L SS Tooltip Blank 0.81 8 — 11 0.75 Blank — — 9.5 ASA1100X00R
ASA 6 (11.00" OD) Rotatable Flat 304L SS Tooltip 6.02 0.81 8 — 11 0.75 6.02 5.92 0.38 9.5 ASA1100X60R
ASA 6 (11.00" OD) Rotatable Flat 304L SS Tooltip 8.02 0.81 8 — 11 0.75 8.02 7.88 0.38 9.5 ASA1100X80R
ASA 8 (13.50" OD) Rotatable Flat 304L SS Tooltip Blank 0.81 8 — 13.5 0.75 Blank — — 11.75 ASA1350X00R
ASA 8 (13.50" OD) Rotatable Flat 304L SS Tooltip 10.02 0.81 8 — 13.5 0.75 10.02 9.88 0.38 11.75 ASA1350X10R
ASA 8 (13.50" OD) Rotatable Flat 304L SS Tooltip 8.02 0.81 8 — 13.5 0.75 8.02 7.88 0.38 11.75 ASA1350X80R
ASA 10 (16.00" OD) Rotatable Flat 304L SS Tooltip Blank 0.81 12 — 16 0.75 Blank — — 14.25 ASA1600X00R
ASA 10 (16.00" OD) Rotatable Flat 304L SS Tooltip 10.02 0.81 12 — 16 0.75 10.02 9.88 0.38 14.25 ASA1600X10R
ASA 10 (16.00" OD) Rotatable Flat 304L SS Tooltip 12.02 0.81 12 — 16 0.75 12.02 11.88 0.38 14.25 ASA1600X12R
ASA 1 (4.25" OD) Rotatable Flat 304L SS Tooltip Blank 0.63 4 — 4.25 0.5 Blank — — 3.13 ASA425X00R
ASA 1 (4.25" OD) Rotatable Grooved 304L SS Tooltip 1.01 0.63 4 — 4.25 0.5 1.01 0.94 0.25 3.13 ASA425X10R
ASA 1 (4.25" OD) Rotatable Grooved 304L SS Tooltip 1.51 0.63 4 — 4.25 0.5 1.51 1.44 0.25 3.13 ASA425X15R
ASA 1.5 (5.00" OD) Rotatable Flat 304L SS Tooltip Blank 0.63 4 — 5 0.5 Blank — — 3.88 ASA500X00R
ASA 1.5 (5.00" OD) Rotatable Grooved 304L SS Tooltip 1.51 0.63 4 — 5 0.5 1.51 1.44 0.25 3.88 ASA500X15R
ASA 1.5 (5.00" OD) Rotatable Flat 304L SS Tooltip 2.01 0.63 4 — 5 0.5 2.01 1.94 0.25 3.88 ASA500X20R
ASA 1.5 (5.00" OD) Rotatable Flat 304L SS Tooltip 2.51 0.63 4 — 5 0.5 2.51 2.44 0.25 3.88 ASA500X25R
ASA 2 (6.00" OD) Rotatable Flat 304L SS Tooltip Blank 0.75 4 — 6 0.5 Blank — — 4.75 ASA600X00R
ASA 2 (6.00" OD) Rotatable Flat 304L SS Tooltip 2.01 0.75 4 6 0.5 2.01 1.94 0.25 4.75 ASA600X20R
ASA 2 (6.00" OD) Rotatable Flat 304L SS Tooltip 2.51 0.75 4 — 6 0.5 2.51 2.44 0.25 4.75 ASA600X25R
ASA 2 (6.00" OD) Rotatable Flat 304L SS Tooltip 3.01 0.75 4 — 6 0.5 3.01 2.94 0.25 4.75 ASA600X30R
ASA 2 (6.00" OD) Rotatable Flat 304L SS Tooltip 3.51 0.75 4 — 6 0.5 3.51 3.44 0.25 4.75 ASA600X35R
ASA 3 (7.50" OD) Rotatable Flat 304L SS Tooltip Blank 0.75 4 — 7.5 0.5 Blank — — 6 ASA750X00R
ASA 3 (7.50" OD) Rotatable Flat 304L SS Tooltip 3.01 0.75 4 — 7.5 0.5 3.01 2.94 0.25 6 ASA750X30R
ASA 3 (7.50" OD) Rotatable Flat 304L SS Tooltip 3.51 0.75 4 — 7.5 0.5 3.51 3.44 0.25 6 ASA750X35R
ASA 3 (7.50" OD) Rotatable Flat 304L SS Tooltip 4.01 0.75 4 — 7.5 0.5 4.01 3.92 0.25 6 ASA750X40R
ASA 4 (9.00" OD) Rotatable Flat 304L SS Tooltip Blank 0.75 8 — 9 0.5 Blank — — 7.5 ASA900X00R
ASA 4 (9.00" OD) Rotatable Flat 304L SS Tooltip 4.01 0.75 8 — 9 0.5 4.01 3.92 0.25 7.5 ASA900X40R
ASA 4 (9.00" OD) Rotatable Flat 304L SS Tooltip 6.02 0.75 8 — 9 0.5 6.02 5.92 0.25 7.5 ASA900X60R

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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