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ASA HV Tees (Grooved & Flat Flanges)

ASA HV Tees (Grooved Flanges)

ASA HV Tees (Grooved Flanges): Three-Port Vacuum Connections with Grooved ASA Flanges for Reliable Sealing

ASA HV Tees (Grooved Flanges) from TFM are precision-fabricated components specifically designed for high-vacuum (HV) systems requiring robust, three-way connections. These tees are constructed using 304L stainless steel tubing, offering excellent durability, corrosion resistance, and performance in chemically active or high-temperature environments.

All ports on the tee are equipped with rotatable ASA flanges featuring o-ring grooves, conforming to the sexed ASA flange standard. This design allows the tee to securely mate with standard flat ASA flanges, using an elastomeric o-ring to achieve a leak-tight seal.

Key Features of ASA HV Tees (Grooved Flanges):

  • All Grooved ASA Flange Configuration
    Each of the three axes is fitted with a rotatable grooved ASA flange, making these tees ideal for integration with flat mating flanges and standard o-ring seals in ASA-based systems.

  • 304L Stainless Steel Tubing
    Provides long-term strength and resistance to corrosion, ensuring compatibility with aggressive gases and vacuum cycling environments.

  • Rotatable Flanges for Flexible Alignment
    All ASA HV Tees (Grooved Flanges) feature rotatable flanges, which allow precise orientation during installation—particularly useful in tight spaces or asymmetrical layouts.

  • Leak-Tight Sealing Performance
    When paired with flat flanges and elastomeric o-rings, these grooved flange tees can maintain vacuum integrity down to 10⁻⁸ Torr, making them suitable for sensitive scientific and industrial systems.

  • Reducer Tee Options Available
    TFM also offers ASA HV reducer tees with grooved flanges, enabling direct connection between different flange sizes without additional adapters.

  • Custom and Standard Sizes
    Available in typical ASA flange diameters such as 4″, 6″, 8″, 10″, and 12″, and customizable by tube length, wall thickness, or angle orientation based on project specifications.

Applications:

  • Three-way vacuum line junctions in HV chambers

  • Modular system expansion for pumping or measurement

  • Gas inlet or exhaust branching in controlled environments

  • Diagnostic or viewport access tees

  • Retrofit nodes for connecting legacy ASA hardware

To complete your system, TFM supplies a full line of ASA-compatible accessories, including flat flanges, FKM or Buna-N o-rings, ASA bolt sets, blank-off plates, and machined adapters.

In conclusion, ASA HV Tees (Grooved Flanges) offer dependable vacuum sealing, modularity, and long-term performance for systems using grooved-to-flat ASA connections. Their robust design, rotatable flanges, and full stainless steel construction make them an excellent choice for demanding HV applications.

Ordering Table

Flange Size/OD Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Tooltip 1-1/2 2.5 AFT04X15G5R
ASA 1.5 (5.00" OD) Tooltip 2 3.25 AFT05X20G5R
ASA 1.5 (5.00" OD) Tooltip 2-1/2 3.25 AFT05X25G5R
ASA 2 (6.00" OD) Tooltip 3 3.5 AFT06X30G5R
ASA 3 (7.50" OD) Tooltip 4 5.12 AFT07X40G5R
ASA 4 (9.00" OD) Tooltip 4 5.12 AFT09X40G5R
ASA 4 (9.00" OD) Tooltip 6 5.25 AFT09X60G5R
ASA 6 (11.00" OD) Tooltip 6 6.44 AFT11X60G5R
ASA 6 (11.00" OD) Tooltip 8 7.38 AFT11X80G5R
ASA 8 (13.50" OD) Tooltip 10 9.88 AFT13X10G5R
ASA 8 (13.50" OD) Tooltip 8 7.75 AFT13X80G5R
ASA 10 (16.00" OD) Tooltip 10 9.88 AFT16X10G5R

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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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