Brooks Model FC8800 Series flow controllers are designed to maintain a constant differential pressure across an integral manual flow regulating valve. Series 8800 controllers are designed for all liquid and gas flows with constant downstream pressures; series 8900 controllers are for all liquid and gas flows with constant upstream pressures.

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Brooks Model FC8744 NRS (non-rising stem) flow controllers accurately adjust and maintain small gas flows. They are designed for constant upstream, variable downstream applications. Suitable for precise control, this valve possesses a high turns-to-lift ratio which provides stable flow for any given stem position.

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Brooks Model FC8844/8944 NRS (non-rising stem) flow controllers accurately adjust and maintain small gas and liquid flows. Model 8844 is designed for constant downstream, variable upstream applications, and model 8944 is designed for constant upstream, variable downstream applications. Suitable for precise control, this valve possesses a high turns-to-lift ratio which provides stable flow for any given stem position.

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Brooks Model 8500 Series NRS (non-rising stem) control valves are designed specifically for extremely low-flow gas and liquid applications. Straight and 90o angle pattern models in brass or stainless steel are available. They feature a means of adjusting a sliding tapered needle which prevents sticking. These valves are particularly suitable for precise control and possess a high turns-to-lift ratio. The flow is constant for any given stem position.

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