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 in a single fitting. This efficient construction offers several advantages for fluid control applications where prevention of backflow is also needed.

Allowing metered flow in one direction and no flow in the opposite direction, these flow controls are ideal for 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 unalterable, or tamperproof. This ensures that once established, the flow characteristics remain consistent and repeatable, making them ideal for applications where unwanted adjustments can negatively affect process performance.

These exceptionally durable and reliable 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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