MDC’s Nipple Reducers are high-performance straight tube fittings used to connect ISO flanges of different sizes in high vacuum systems. As part of the Kwik-Flange™ ISO KF and Large-Flange™ ISO LF product lines, these components allow for seamless diameter transitions while maintaining vacuum integrity. Constructed from drawn and TIG-welded 304 stainless steel tubing, they are engineered for durability, leak-tight performance, and structural strength.

These fittings are rated to 1x10⁻⁸ Torr (1.3x10⁻⁶ Pa) and designed for use in systems operating up to 200°C. Sizes range from main flange NW25 through NW160, with configurations that reduce to smaller or larger mating flanges. Available in single-piece or fully welded designs, MDC nipple reducers feature symmetric, nonrotatable geometries and a standard matte finish for clean assembly. Their ISO compatibility ensures smooth integration into both KF and LF vacuum system layouts.

Industry Applications

MDC’s Straight Tube Nipple Reducers are essential for connecting components with differing flange diameters in high vacuum systems. They are widely used in semiconductor process tools, thin-film coating systems, vacuum testing equipment, and research laboratories. These reducers simplify the design of custom vacuum manifolds, modular chamber connections, and system retrofits, enabling engineers to maintain consistent vacuum performance while accommodating variable tubing sizes. Ideal for dynamic or compact layouts, they help maintain vacuum system integrity during thermal cycling, pressure fluctuation, or misalignment correction.