Product Specification

4-Way Crosses for Vacuum System: Multi-Port Integration with Full Integrity

Product Description

4-way crosses for vacuum system are precision multi-port fittings designed to connect up to four vacuum components in orthogonal directions while maintaining uncompromised vacuum integrity from rough vacuum to ultra-high vacuum (UHV) levels. Unlike standard plumbing crosses, these vacuum-rated components feature smooth internal geometries, minimal trapped volumes, and vacuum-grade surface finishes to eliminate virtual leaks and reduce outgassing.

Manufactured from low-carbon stainless steel (304L or 316L), these crosses are essential for complex vacuum manifolds, multi-instrument chambers, gas distribution hubs, and cross-flow pumping configurations. Each 4-way cross is fabricated with strict attention to weld quality, internal surface condition, and flange alignment across all four ports. Whether you are building a multi-sensor diagnostic station, a gas mixing manifold, or a 360-degree access vacuum hub, these crosses deliver the conductance, flexibility, and reliability that demanding high-vacuum and UHV applications require.

Key Features & Characteristics

• Configuration: Four orthogonal ports (straight-through horizontal + perpendicular vertical)

• Branch Orientation: 90° between all adjacent ports (custom angles available)

• Vacuum Range: Atmospheric to 1×10⁻⁹ Torr (UHV compatible)

• Flange Standards: ISO-KF, ISO-K, CF (ConFlat), or custom configurations

• Material: 304L / 316L stainless steel (low magnetic permeability)

• Internal Surface Finish: Ra ≤ 0.8 µm (electropolished or mechanically polished)

• Outgassing Rate: < 2×10⁻⁸ Torr·L/s·cm² (after vacuum cleaning)

• Leak Integrity: Helium leak tested to < 1×10⁻⁹ mbar·L/s

• Bakeout Capability: Up to 400°C (CF flanges with metal seals)

• Port Options: All ports same size, or reducing crosses with mixed diameters

• Symmetry: True orthogonal geometry for uniform flow characteristics

Applications

• Multi-instrument vacuum hubs: Connecting gauges, RGAs, and viewports simultaneously

• Gas mixing manifolds: Introducing multiple process gases to deposition chambers

• Thin-film deposition: Sputtering, evaporation, and ALD system plumbing

• Cross-flow pumping configurations: Symmetrical pumping for uniform pressure distribution

• Analytical instruments: Mass spectrometers, electron microscopes, surface analysis tools

• Semiconductor equipment: Load locks, transfer chambers, and process modules

• R&D vacuum systems: Flexible experimental setups requiring multiple access points

• Space simulation: Thermal vacuum chamber instrumentation ports

Why Choose Our 4-Way Crosses for Vacuum Systems?

We combine precision forging, CNC machining, and orbital welding to deliver vacuum crosses that meet or exceed international clean vacuum standards. Every 4-way cross is helium leak tested, ultrasonically cleaned with semiconductor-grade detergents, and double-bagged in a cleanroom environment. Reducing crosses (different port diameters), custom port orientations, and special center-to-flange dimensions are available with engineering support.