Custom Engineering Overview
MDC Vacuum Products Corporation specializes in custom fabrication of vacuum chambers and components, accommodating a wide range of specifications. They utilize AutoCAD® software and accept DWG or DXF formats. For projects without customer-provided drawings, MDC offers a complete engineering documentation package for a fee.

Chamber Geometry and Specifications
Custom chambers are typically made from standard tubing for diameters ≤10 inches, while larger sizes use rolled stainless steel sheet metal. Port positioning is achieved using laser-aligned fixtures, defined by five geometric parameters. Chambers can have multiple focal points located on focal planes parallel to the chamber's base plane.

Materials and Construction
Type 304 stainless steel is standard for vacuum chamber construction due to its machining characteristics and corrosion resistance. Other materials like 304L, 316, and 316L stainless steels are available. MDC offers water cooling features, with double-wall construction being the most efficient.

Welding and Surface Finishes
MDC uses advanced TIG welding techniques and adheres to UHV welding standards. Surface finishes include glass bead blasting and optional electrochemical polishing. All weld joints are leak tested using a mass spectrometer leak detector.

Leak Testing and Cleaning
Components undergo rigorous leak testing throughout manufacturing. Final cleaning involves washing in a high-temperature detergent bath, followed by rinsing and drying with nitrogen.

Packaging and Shipping
Components are meticulously packaged to prevent damage during transit, with options for shipping chambers under vacuum. MDC vacuum chambers are designed for high and ultrahigh vacuum applications and are not rated for positive pressure above one atmosphere.

Modifications to Standard Parts
MDC offers modifications to standard components based on customer requirements. Technical sales engineers are available to discuss and document changes using existing catalog drawings.

Custom Vacuum Components
MDC specializes in creating custom vacuum components tailored to specific needs, using AutoCAD® software to handle DWG or DXF file formats. They offer a complete engineering documentation package for projects without customer-provided drawings.

Flange Assembly Methods
The document outlines four methods for installing flanges:

• Tubulated Method: Involves welding a half-nipple to a larger flange, allowing for rotatable flanges.
• Flush Mount Method: Economical, using standard components with minimal modification, involving fusion welding.
• Zero Length Method: Similar to flush mount but with a counter-bore for a recessed profile.
• Integrally Machined Method: Eliminates weld joints, requiring extensive machining, offering aesthetic appeal.

Recommendations
Consulting with an MDC technical sales engineer is advised to determine the best solution for specific applications.