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Baseplate Plugs

Baseplate NPT Couplings & Plugs Overview

Baseplate NPT couplings and plugs are designed for use with vacuum chamber walls ranging from 1/4″ to 1-1/4″ in thickness. These components are essential for securely connecting tubes to vacuum chambers or blanking off unused ports.

Key Features:

  • Material Options: Baseplate NPT couplings are available in stainless steel, while baseplate plugs come in stainless steel, brass, or aluminum.
  • Coupling Installation: Baseplate NPT couplings are mounted into a baseplate port with an O-ring inside the chamber for sealing. Tubes can be connected via a compression O-ring or a female NPT fitting, ensuring a leak-tight interface.
  • Plug Design: Baseplate plugs use an O-ring seated on the inside finished surface of the chamber’s feedthrough port or hole. The plug is tightened and sealed with a wing nut on the atmosphere side, providing a reliable blanking option for unused ports.

Ordering Table

Baseplate Plugs

Drawing Hole ID Plug OD Part Number
Tooltip 0.75 1.5 FBH-075S
Tooltip 1 1.5 FBH-100AL
Tooltip 1 1.5 FBH-100S
Tooltip 1.25 1.75 FBH-125S
Tooltip 1.5 2 FBH-150S
Tooltip 1.75 2.25 FBH-175S

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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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