Toroidal Orifice, WJ999 / 3.0 (11/32") 911701-001

The Toroidal Orifice WJ999 / 3.0 (11/32") is a precision flow control component used in Watkins-Johnson (WJ999 series) semiconductor processing systems, typically within gas or liquid delivery assemblies.

A toroidal orifice features a ring-shaped (annular) flow geometry, designed to provide uniform, controlled flow distribution while minimizing turbulence and pressure fluctuations. This design is critical in semiconductor tools where stable and repeatable flow characteristics directly impact process consistency and yield.

The 11/32" orifice size defines the effective flow restriction diameter, calibrated for specific process conditions and system configurations. Toroidal orifices are commonly paired with springs, seals, and rotating assemblies in WJ systems to regulate flow dynamically.