O'Keefe Controls Co. Tamperproof Checked Orifices are a unique style of flow control consisting of an integral check valve and a fixed precision orifice incorporated into a single fitting.

This efficient construction allows metered flow in one direction and no flow in the opposite direction — ideal for flow control applications such as isolation of fluid sources in mixers, fluid contamination reduction, and preventing backflow in metered systems, to name just a few of the many uses across industries.  

Additionally, the use of a fixed precision orifice to achieve the metered flow makes them tamperproof, ensuring that once established, the flow characteristics remain consistent and repeatable. This is a useful feature for applications where unwanted adjustments can negatively affect process performance.

Exceptionally durable and reliable, these devices are available in a wide variety of connections and sizes for easy incorporation into a broad range of fluid control systems.

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