--- title: Variable Speed Flow Controllers | Pumptec description: Our variable speed flow controllers can adjust pump flow rate by simply turning a knob. Use them to control the flow rate of any Pumptec 100 series pump. image: https://www.pumptec.com/hubfs/variable-flow-controller-1.png --- [![pumptec_logo](https://www.pumptec.com/hubfs/logos/pumptec_logo.svg "pumptec_logo")](https://www.pumptec.com/) [SPEAK WITH A PUMP EXPERT](https://www.pumptec.com/contact-pump-expert) [![Pumptec logo](https://www.pumptec.com/hubfs/logos/pumptec_logo.svg "Pumptec logo") ](https://www.pumptec.com/) [SPEAK WITH A PUMP EXPERT](https://www.pumptec.com/contact-pump-expert) Search [![pumptec_logo](https://www.pumptec.com/hubfs/logos/pumptec_logo.svg)](https://www.pumptec.com/) [![Speak With a Pump Expert](https://no-cache.hubspot.com/cta/default/7644413/ae75fe13-0edc-4b1f-b05b-e5cf004e7592.png)](https://cta-redirect.hubspot.com/cta/redirect/7644413/ae75fe13-0edc-4b1f-b05b-e5cf004e7592) [![Troubleshooting & Support](https://no-cache.hubspot.com/cta/default/7644413/d9781e4d-b3b9-40fa-bb1d-b85a459ba8d9.png)](https://cta-redirect.hubspot.com/cta/redirect/7644413/d9781e4d-b3b9-40fa-bb1d-b85a459ba8d9) ![Variable flow controller](https://www.pumptec.com/hs-fs/hubfs/product-catalog/images-primary/variable-flow-controller.webp?width=427&name=variable-flow-controller.webp "Variable flow controller") [DESCRIPTION](https://www.pumptec.com/products/variable-speed-flow-controllers#description) [SPECIFICATIONS](https://www.pumptec.com/products/variable-speed-flow-controllers#specifications) [CONFIGURATIONS](https://www.pumptec.com/products/variable-speed-flow-controllers#configurations) [DOWNLOADS & RELATED CONTENT](https://www.pumptec.com/products/variable-speed-flow-controllers#downloads) [ Request a Quote ](https://www.pumptec.com/products/variable-speed-flow-controllers#qrpop) # Variable Speed Flow Controllers #### Adjust pump flow rate by turning a knob --- ## Description Control the flow rate of any Pumptec 100 series pumps by turning a knob. Great for systems requiring precise flow rates. Calibrate your pump during initial installation for repeatable flow performance. Also protects against overloads by monitoring and limiting motor amps. --- ## Specifications **Mounting Plate** Stainless Steel **Control Box** Nema 4X plastic **Speed Range (ratio)** 50:1 --- ## Configurations Select a model - Select a model - 100FC-12VDC - 100FC-24VDC - 100FC-120VAC - 100FC-230VAC **Model** 100FC-12VDC **Input Voltage** 10-15VDC **Amp Rating** 14A (Max Continuous) **Control Type** PWM **Operating Frequency** > 16kHz **Dimensional Images** [View PDF](https://www.pumptec.com/hubfs/product-catalog/pdf/DIMS%20100%20SERIES%20FLOW%20CONTROL.pdf) **CAD File** [View STEP file](https://www.pumptec.com/hubfs/product-catalog/cad/100%20SERIES%20FLOW%20CONTROL.step) **Model** 100FC-24VDC **Input Voltage** 20-30VDC **Amp Rating** 14A (Max Continuous) **Control Type** PWM **Operating Frequency** > 16kHz **Dimensional Images** [View PDF](https://www.pumptec.com/hubfs/product-catalog/pdf/DIMS%20100%20SERIES%20FLOW%20CONTROL.pdf) **CAD File** [View STEP file](https://www.pumptec.com/hubfs/product-catalog/cad/100%20SERIES%20FLOW%20CONTROL.step) **Model** 100FC-120VAC **Input Voltage** 115VAC-60Hz **Amp Rating** 3.5A (Max DC Load) **Control Type** SCR **Operating Frequency** NA **Dimensional Images** [View PDF](https://www.pumptec.com/hubfs/product-catalog/pdf/DIMS%20100%20SERIES%20FLOW%20CONTROL.pdf) **CAD File** [View STEP file](https://www.pumptec.com/hubfs/product-catalog/cad/100%20SERIES%20FLOW%20CONTROL.step) **Model** 100FC-230VAC **Input Voltage** 208/230VAC - 50/60Hz **Amp Rating** 3.5A (Max DC Load) **Control Type** SCR **Operating Frequency** NA **Dimensional Images** [View PDF](https://www.pumptec.com/hubfs/product-catalog/pdf/DIMS%20100%20SERIES%20FLOW%20CONTROL.pdf) **CAD File** [View STEP file](https://www.pumptec.com/hubfs/product-catalog/cad/100%20SERIES%20FLOW%20CONTROL.step) --- ## Downloads & Related Content - [Variable Speed Flow Controller Operating Instructions and Parts Manual](https://www.pumptec.com/hubfs/product-catalog/pdf/ServiceOIPManual_100%20SERIES%20FLOW%20CONTROLLER.pdf) - [View Related Blog Article](https://www.pumptec.com/blog/benefits-of-variable-speed-flow-controller-for-pumps) ## Request a Quote Get additional information on the accessory line by completing the form below! [![pumptec_logo](https://www.pumptec.com/hubfs/logos/pumptec_logo.svg "pumptec_logo")](https://www.pumptec.com/) 700 McKinley Street Anoka, MN 55303 Phone: (763) 433-0303 Fax: (763) 433-0404 Toll Free Fax: (888) PUMPTEC © 2026 PUMPTEC. ALL RIGHTS RESERVED. [PRIVACY POLICY](https://www.pumptec.com/privacy-policy) ![](https://px.ads.linkedin.com/collect/?pid=2051674&fmt=gif)