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ASA HV Reducer Full Nipples (Grooved & Flat Flanges)

ASA HV Reducer Full Nipples (Flat Flanges)

ASA HV Reducer Full Nipples (Flat Flanges): Clean, Reliable Transitions Between Flange Sizes in HV Systems

The ASA HV Reducer Full Nipples (Flat Flanges) by TFM are engineered to provide seamless, vacuum-tight transitions between ASA flanges of differing sizes, using smooth (flat) sealing surfaces on both ends. Built from corrosion-resistant 304L stainless steel, these reducer nipples ensure structural integrity, vacuum compatibility, and long service life in a wide range of high vacuum (HV) applications.

Unlike standard full nipples, the reducer design accommodates mismatched flange sizes, making it a critical component in modular vacuum system builds, retrofits, and process line adaptations. The use of flat ASA flanges means each end is intended to mate with a grooved flange, supporting a traditional ASA sexed seal with an o-ring.

Key Features of ASA HV Reducer Full Nipples (Flat Flanges):

  • Flat-Flanged Ends for Mating with Grooved ASA Components
    Both ends of the nipple feature smooth sealing faces, ensuring compatibility with standard grooved ASA flanges and o-ring assemblies.

  • Reducer Design for Flange Size Transitions
    Designed to adapt between two different ASA flange diameters, simplifying system expansion or integration of mixed-dimension components.

  • 304L Stainless Steel Construction
    Resistant to corrosion and high temperatures, this material ensures mechanical strength and vacuum reliability under demanding conditions.

  • Vacuum-Compatible Performance
    When properly sealed with compatible o-rings and hardware, these nipples support HV system operation down to ~10⁻⁷ torr or better.

  • Customization Options Available
    TFM offers standard lengths and tube diameters, but also welcomes inquiries for custom reducer geometries, including non-standard flange sizes and lengths.

Applications:

  • Joining ASA flanges of different sizes within pump lines or chamber manifolds

  • Building vacuum foreline or process gas routing networks with flexible flange standards

  • Retrofitting older systems to match newer or smaller ASA port specifications

  • Integrating instruments or auxiliary ports that require mixed flange connections

  • Suitable for use in thin-film deposition, plasma processing, and scientific research chambers

TFM also supplies grooved flange reducer nipples, standard and half ASA nipples, and a complete set of ASA-compatible o-rings and bolt hardware—ensuring a fully integrated vacuum component ecosystem.

Ordering Table

Flange Size/OD Type Drawing Nominal Tube OD ASA Flange OD (Large) ASA Flange OD (Small) Note Dim A Part Number
ASA 3 (7.50" OD) Fixed Tooltip 1-1/2 7.5 4.25 5 AFR07X04
ASA 8 (13.50" OD) Fixed Tooltip 6 13.5 9 — 5 AFR13X09
ASA 10 (16.00" OD) Fixed Tooltip 8 16 11 — 5 AFR16X11
ASA 10 (16.00" OD) Rotatable Tooltip 8 16 11 — 5 AFR16X11R
ASA 10 (16.00" OD) Fixed Tooltip 10 16 13.5 — 5 AFR16X13
ASA 10 (16.00" OD) Rotatable Tooltip 10 16 13.5 — 5 AFR16X13R

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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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