The LYCO® EFV I (U.S. Patent 4,257,452) is primarily for 3/4 IPS through 1 IPS “Stick” applications, though many carrier options are available for adapting to other service sizes.

Series - Available today in 5 of the most common Trip-Point ranges (@ 10 psig).

• EFV I Series 350
• EFV I Series 475
• EFV I Series 775
• EFV I Series 1200
• EFV I Series 1800

Configurations:
View Configuration Guide

• Medium or High Density PE
• Your specified lengths "Sticks" (10" lengths are standard)
• Reducer or Socket Fusion Coupler Ends
• Adapted to Service Tees

LYCO® EFV I - Specifications:

• Service Temperatures: -20°F to 140°F
• Operating Pressure: 5 – 125 psig (depending on housing)
• By-pass Flow Rate: 5 to 20 SCFH at a line pressure of 10 psig*
• Actuation Flow Rate: Dependent on line pressure and EFV model (See graph)*

* For additional data, please reference the LYCO® EFV I Technical Data Package.

A complete set of specifications and test results for Lyall’s Excess Flow Valves is available upon request. Please contact your R.W. Lyall & Company Sales Representative for additional information.

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