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ASA HV Half Nipples (Grooved Flange)

ASA HV Half Nipples (Grooved Flange)

ASA HV Half Nipples (Grooved Flange): Compact Sealing Components for ASA Grooved-to-Flat Vacuum Interfaces

ASA HV Half Nipples (Grooved Flange) from TFM are compact and versatile vacuum components designed to provide a sealed termination or modular connection point within high-vacuum (HV) systems. Manufactured using corrosion-resistant 304L stainless steel tubing, each unit features a single fixed ASA flange with a precision-machined groove for o-ring seating, designed to mate with a flat ASA flange to form a secure, sexed vacuum seal.

These grooved half nipples are ideal for terminating ports, attaching valves, or building modular vacuum subsystems where space, sealing consistency, and mechanical reliability are critical.

Key Features of ASA HV Half Nipples (Grooved Flange):

  • Single Grooved ASA Flange
    Designed to hold an o-ring and mate with flat ASA flanges, forming a standard sexed ASA seal that supports vacuum levels down to 10⁻⁸ Torr.

  • 304L Stainless Steel Construction
    Excellent strength, thermal tolerance, and corrosion resistance make it suitable for demanding HV applications in research, semiconductor, and aerospace industries.

  • Compact Form Factor
    Half-length design makes it ideal for limited-space configurations, chamber ports, or system terminations.

  • Vacuum-Ready and Leak-Tested
    All ASA HV Half Nipples (Grooved Flange) are helium leak tested and cleaned to meet stringent high-vacuum specifications.

  • Available in Common and Custom Sizes
    Standard ASA flange diameters include 4″, 6″, 8″, 10″, and 12″. Custom tube lengths, wall thicknesses, and flange orientations are available upon request.

Common Applications:

  • Port connections on vacuum chambers or foreline assemblies

  • Sealed interface points for valves, sensors, or viewports

  • Modular vacuum setups using grooved-to-flat flange mating

  • Termination points for diagnostic or pumping subsystems

  • Transition to flexible hose or custom connectors via ASA flange

TFM also offers compatible flat ASA flanges, FKM/Buna-N o-rings, bolt kits, and matching reducer or full nipples to ensure full system integration.

In summary, ASA HV Half Nipples (Grooved Flange) provide a straightforward and space-saving solution for sealing and connecting ASA-standard vacuum components. With stainless steel durability, o-ring compatibility, and modular flexibility, they are a core building block in reliable high-vacuum infrastructure.

Ordering Table

Flange Type Flange Size/OD Drawing Nominal Tube OD Grooved Flanges ASA Flange OD (Large) ASA Flange OD (Small) Dim A Part Number
Rotatable ASA 4 (9.00" OD) Tooltip 3 Flange 1 (larger) 9 6 5 AFR09X06G1R
Fixed ASA 8 (13.50" OD) Tooltip 4 Flange 1 (larger) 13.5 7.5 5 AFR13X07G1
Fixed ASA 8 (13.50" OD) Tooltip 8 Flange 1 (larger) 13.5 11 5 AFR13X11G1
Fixed ASA 10 (16.00" OD) Tooltip 8 Flange 1 (larger) 16 11 5 AFR16X11G1
Rotatable ASA 10 (16.00" OD) Tooltip 8 Flange 1 (larger) 16 11 5 AFR16X11G1R
Fixed ASA 10 (16.00" OD) Tooltip 8 Flange 2 (smaller) 16 11 5 AFR16X11G2

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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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