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Fast-Entry Access Load Lock Doors

Quick Access to Vacuum Vessels

Quick and convenient access to vacuum vessels, such as process chambers and load locks, is essential for efficient operations.

Features

  • Variety of UHV Flange Sizes: Available in a wide range of ultra-high vacuum (UHV) flange sizes, with options for viewport glass.
  • Precision-Hinged Access Doors: These doors are designed to seal tightly with a fluorocarbon O-ring, ensuring a secure closure.
  • Unique Counterbored Mounting Bolt Design: KJLC’s® innovative design allows for a maximum diameter opening through the door. Be sure to order the appropriate socket head bolt sets and kits separately.
  • Easy-to-Remove Viewport Glass: The viewport glass is sealed with an O-ring and can be easily removed for cleaning or replacement.
  • Secure Door Closure: A threaded knob is included to keep the door securely closed during pumpdown.
  • Standard Tempered Pyrex Glass: Each unit comes standard with tempered Pyrex viewport glass, with replacement quartz glass also available.

Note:

To prevent overpressurization of the vessel, it is recommended to disengage the knob during the vent cycle. For additional details, please visit the Fast-Entry Access Doors Hardware page.

Ordering Table

A Flange Size B Door Opening C Viewport Diameter D Thickness Part Number
DN63CF (4.50" OD) 2.51" N/A 1.28" DS-LL0450
DN63CF (4.50" OD) 2.51" 2.50" 1.28" DS-LL0450VP
DN100CF (6.00" OD) 4.01" N/A 1.42" DS-LL0600
DN100CF (6.00" OD) 4.01" 4.00" 1.42" DS-LL0600VP
DN160CF (8.00" OD) 6.02" N/A 1.41" DS-LL0800
DN160CF (8.00" OD) 6.02" 6.00" 1.42" DS-LL0800VP
DN200CF (10.00" OD) 8.02" N/A 1.72" DS-LL1000
DN200CF (10.00" OD) 8.02" 6.00" 1.72" DS-LL1000VP
DN250CF (12.00" OD) 10.02" N/A 1.78" DS-LL1200
DN250CF (12.00" OD) 10.02" 6.00" 1.78" DS-LL1200VP
DN275CF (13.25" OD) 10.02" N/A 1.83" DS-LL1325
DN275CF (13.25" OD) 10.02" 6.00" 1.83" DS-LL1325VP
DN295CF (14.00" OD) 11.47" N/A 1.83" DS-LL1400
DN295CF (14.00" OD) 11.47" 6.00" 1.83" DS-LL1400VP

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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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