Excess Flow Valves

Excess Flow valves are known by other names such as velocity check, emergency shutdown device, seismic valve, shutdown valve, surge preventer, earthquake valve, and line rupture valve. These valves are designed to close when a sudden flow surge occurs. Excess Flow valves are in-line valves through which pressurized gas or liquid flows in either direction. These are spring-loaded flow shut-off valves, which will only close when the flow through the valve exceeds a predetermined closing flow rate in the direction marked on the valve. Each valve has a closing flow rate based on specified conditions. Our 2000 series Excess Flow valves can be used for several types of fluids and processes including LP gas, butane, anhydrous ammonia, anhydrous chlorine, nitrogen air, water, and others. Excess Flow valves are available in a wide variety of pressure classes, materials, flange designs and end connections. All valves are tested in our certified flow laboratory. Test certificates and performance graphs are provided by our state-of-the-art data-acquisition system, Total Valve Live.

To schedule a brief presentation that can be held at your location or via Webinar, please contact us at Sales@totalvalve.com.

Series

• 2100 Between Flanges for Bypass Resetting
• 2400 Tank Applications
• 2600 Externally Adjustable - Fire Safe API 6F Rated
• Note: All valves are available by different pressure classes. We will custom design and manufacture an excess flow valve to meet customer and federal requirements. Dimensions shown are for standard design and are subject to change without notice. See our product catalog for individual valve specifications.