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ASA HV Flanges – Rotatable Grooved

ASA HV Flanges – Fixed Grooved

Introduction

ASA HV Flanges – Fixed Grooved are robust vacuum connection components designed for high vacuum (HV) systems requiring reliable sealing and mechanical stability. Based on ASA (American Standards Association) flange dimensions, these flanges provide a standardized interface for vacuum piping and equipment, particularly in industrial and large-scale vacuum applications.

Detailed Description

ASA HV fixed grooved flanges are precision-machined from high-strength stainless steel, typically SS304 or SS316/316L, offering excellent corrosion resistance and mechanical durability. The “fixed grooved” design refers to the integrated sealing groove machined directly into the flange face, which accommodates elastomer O-rings to achieve a dependable vacuum seal.

Unlike rotatable or loose flanges, fixed grooved flanges provide enhanced structural rigidity and alignment accuracy, making them suitable for installations where flange orientation remains constant. The grooved sealing surface ensures consistent compression of the O-ring, reducing the risk of leaks and improving long-term sealing performance.

These flanges are commonly used in bolted vacuum connections, providing strong and stable joints capable of withstanding pressure differentials and mechanical loads. Their compatibility with ASA bolt patterns allows easy integration into existing systems and facilitates interchangeability with standard industrial components.

Optional surface treatments such as electropolishing can be applied to improve cleanliness and reduce outgassing, which is beneficial in sensitive vacuum environments.

Key features include:

  • Fixed grooved design for reliable O-ring sealing

  • High-strength stainless steel construction

  • Excellent corrosion resistance and durability

  • Standard ASA bolt pattern for easy integration

  • Stable and rigid connection for vacuum systems

  • Suitable for repeated assembly and long-term use

Applications

ASA HV fixed grooved flanges are widely used in:

  • High vacuum (HV) piping systems

  • Industrial vacuum chambers and equipment

  • Thin film deposition systems (PVD, CVD)

  • Chemical processing and gas handling systems

  • Vacuum furnaces and thermal processing units

  • Research laboratories and pilot-scale systems

Technical Parameters

ParameterTypical Value / RangeImportance
MaterialSS304 / SS316LCorrosion resistance & strength
StandardASA (ANSI-compatible)Ensures interchangeability
Sealing TypeGrooved O-ring (Viton / NBR / EPDM)Reliable vacuum sealing
Size Range1″ – 12″ and larger (custom)System compatibility
Surface FinishMachined / electropolishedReduces contamination
Operating PressureHV range (~10⁻⁸ mbar typical)Suitable for vacuum systems

Comparison with Related Materials

Material/SystemKey AdvantageTypical Application
ASA Fixed GroovedStrong, stable bolted connectionIndustrial HV systems
KF (QF) FlangesQuick assembly/disassemblyLaboratory HV systems
CF FlangesMetal seal for UHVUltra-high vacuum
ISO FlangesLarge diameter capabilityIndustrial vacuum lines

FAQ

QuestionAnswer
What is the benefit of a grooved flange design?It ensures proper O-ring positioning and consistent sealing performance.
Are these flanges suitable for UHV applications?They are mainly used for HV; UHV systems typically require CF flanges.
Can O-ring materials be customized?Yes, Viton, NBR, and EPDM options are available depending on application.
Are these flanges compatible with ANSI standards?Yes, ASA flanges follow ANSI-compatible bolt patterns.
Can sizes be customized?Yes, a wide range of sizes and custom specifications can be provided.

Packaging

Our ASA HV Flanges – Fixed Grooved are meticulously tagged and labeled externally to ensure efficient identification and maintain high standards of quality control. Each flange is carefully packaged to prevent mechanical damage and contamination during storage and transportation, ensuring reliable performance upon installation.

Conclusion

ASA HV fixed grooved flanges provide a durable and reliable solution for high vacuum system connections. With their robust construction, standardized dimensions, and dependable sealing performance, they are ideal for industrial vacuum applications requiring long-term stability and ease of integration.

For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.

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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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